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Diversidad de murcielagos de la Concesion para Conservacion Rio La Novia, Ucayali, Peru.

Bat diversity from the Rio La Novia Conservation Concession, Ucayali, Peru

Introduction

In Peru, no less than 180 bat species have been recorded, representing more than 30% of the Peruvian mammalian species (Pacheco V. pers. comm.); and this richness is more concentrated in the Peruvian Tropical lowland forest (Pacheco 2002, Pacheco et al. 2009). The Ucayali Department is covered with extensive area of lowland forest and has a record of more than 87 bat species (Quintana et al. 2009, Medina et al. 2016); however, most of the territory is still unexplored, especially near the frontier with Brazil, in the Purus province.

The first expeditions to study the diversity of Purus were conducted in Balta, at the left bank of Rio Alto Purus, between 1963 and 1971 by J. O'Neil, A. L. Gardner, and J. L. Patton, who recorded 130 species of mammals, including 56 bats (Voss & Emmons 1996). Later, other studies in the province focused on large mammals (INRENA 2001, ADAR 2002, Leite et al. 2003, Lleellish et al. 2003, Pacheco & Amanzo 2003, Ruelas et al. 2016a) and non-volant small mammals (Leite et al. 2003, Ruelas et al. 2016b). Unfortunately in the last 45 years, few studies on bat diversity were conducted (Voss & Emmons 1996).

The main objective of this study was to study the diversity (species richness) and the relative abundance of bats from the Rio La Novia Conservation Concession (RLN), located on the right margin of the Purus River (Ucayali, Peru), to compare it with other regions in the Peruvian Amazonia, and to support the efforts on the conservation and the sustainable use of biodiversity in this area.

Materials and methods

The Rio La Novia Conservation Concession (RLN) is on the right bank of Rio La Novia, a tributary of Purus River, in Purus district and province, Ucayali department, Peru (9[degrees]0'42"S, 70[degrees]41'42"W, elevation 281 m). The RLN is managed by the Asociacion de Manejo y Conservacion de Bosques Sin Fronteras (MABOSINFRON) created by residents of Puerto Esperanza, Purus (Fig. 1).

La Novia River area is a primary and dense forest with low human intervention with a very high canopy (20 to 30 m high) and abundant timber trees such as "Cedro" (Cedrela odorata), "caoba" (Sweitenia macrophyla), "ishpingo" (Amburana cearensis), "estoraque" (Myroxylon balsamun), "copaiba" (Copaifera paupera), and "azucar huayo" (Hymenaeacourbaril) (Cornejo 2016, Mena 2016). The area presents numerous hills and streams, with gentle and steep slopes, up to 75[degrees] of tilt (Ruelas D. pers. obs.). The soil is mostly clay. In the dry season, La Novia river dries almost completely, the water level drastically from 3 or 2 m (wet season) until 0.10 to 0.50 m (Ruelas D. pers. obs.).

We conducted two surveys, in wet season (April-May 2015) and dry season (July - August 2015). In each survey, we installed 13 mist nets (12 x 2.5 m), 6 on the ground and 7 at canopy level (approximately to 15 m high). Mist nets were active during 24 nights in the wet season and 27 nights in the dry season, from 18:00 to 00:00 hours. Captured bats were placed in cloth bags. We followed the ethical guidelines of the American Society of Mammalogist for the euthanasia of specimens (Sikes et al. 2016). We recorded the standard biometrical measurements, sex, and reproductive condition. Some specimens were fixed in 10% formalin for seven days, then washed with water and preserved in alcohol at 70[degrees] (Kingston 2016). Other individuals were preserved as dry skins. We removed the skulls of specimens in the field, then cleaned at the lab using a dermestid colony. All specimens are deposited in the Museo de Historia Natural of the Universidad Nacional Mayor de San Marcos (MUSM).

For the taxonomic determination, we followed taxonomic keys (Gardner 2008, Diaz et al. 2016), revisions (Barquez et al. 1999, Woodman & Timm 2006, Garbino et al. 2012, Ruelas 2017), and the specimens of the MUSM collection for comparisons. The taxonomic nomenclature used by Pacheco et al. (2009) was complemented with more recent taxonomic changes (Parlos et al. 2014). In addition, species representing new records were compared using diagnostic morphological characters and measurements available in the literature. We took the measurements of the specimens using a Mitutoyo caliper (Error: [+ or -] 0.01 mm).

Sampling effort was expressed as mist nets-night:

N= No. mist nets * No. nights

Accumulation curve was estimated for each season by Clench model with the formula

v2= (a*v1)/(1+(b*v1),

where a is the rate of increase of new species at the start of the sampling, and b is the parameter related to the shape of the curve (Jimenez-Valverde & Hortal 2003). To estimate the parameters of the curve, we used Estimates v.9 software, and to make the graphics, we used Statistica v.13 software. According to this model, the probability of adding species to the list decreases when sampling effort increase (Moreno 2001).

We determinate the relative abundance (RA) in relation to the sampling effort, which was expressed as individuals per mist net-night (ind/NN) (Pucek 1981, Pacheco et al. 2007). To estimate the accumulation curve and RA, we only included the individuals captured by mist nets. Other types of records were considered occasional.

We assigned species to trophic guilds following Emmons and Feer (1999) and Wetterer et al. (2000), and the percentage of each guild was calculated by dividing the number of individuals recorded of the guild "n" by the total of individuals recorded (Hice et al. 2004). For species with several trophic guilds, we considered only the most important, following Emmons and Feer (1999) and Wetterer et al. (2000).

In addition, we evaluated the similarity between Purus and other Amazonian forests using the Sorensen index and test whether this similarity is correlated with linear geographic distances using a Mantel test (Mantel 1967). We selected seven Peruvian Amazonian places considered well-inventoried for bats with records below 500 m of elevation. These were: Cusco Amazonico (Voss & Emmons 1996), Centro de Investigaciones Jenaro Herrera (Ascorra et al. 1992, Fernandez-Arellano & Torres-Vasquez 2013), Reserva Nacional Matses (Fleck et al. 2002), Parque Nacional Allpahuayo-Mishana (Hice et al. 2004, Diaz 2011), Reserva de Biosfera del Manu (Solari et al. 2006), Iquitos (Angulo & Diaz 2004, Willig et al. 2007, Diaz 2011, Rengifo et al. 2013) and Parque Nacional Sierra del Divisor (Medina et al. 2015). For this purpose, the Purus bat list includes the records from Balta (Voss & Emmons 1996) and RLN (this study).

We used R v.3.3.0 (R Core Team 2016) with the packages Vegan and Fossil (Oksanen 2015, Vavrek 2015). The linear geographic distances between areas were estimated in Google Earth. The level of statistical significance was p<0.05.

Results

Richness species.- We gathered a total sampling effort of 725 NN (334 NN in the wet season and 391 NN in the dry season) in the RLN (Table 1). With this effort, we recorded 30 species of bats. Phyllostomidae was the most diverse family (24 species), followed by Molossidae (2 species) and Vespertilionidae (3 species), and finally the Emballonuridae (1 species). In addition, two occasional records were recorded in roosting in the wet season: 1) Peropteryx macrotis, six individuals found in a fallen tree, and 2) Molossus molossus, one individual, found in a house at Puerto Esperanza, 15 km N from the RLN. We did not include these specimens in the accumulation curve and the analysis of abundance. We also captured a female adult of Sturnira sp., apparently S. lilium, which was accidentally released before identification. In total, we report 32 bat species for RLN. In the appendix 1 some species from RLN are shown.

The species Phylloderma stenops, Peropteryx macrotis, Eumops cf. delticus, and Molossops temminckii were new additions for Purus. The last two species were captured with mist nets set up at about 15 m above the ground and are also the first records for the Ucayali department and represent a significant extension from their previous distributional range. The record of E. cf. delticus is also the second to Peru (Fig. 2, Table 2).

FAMILY MOLOSSIDAE

Eumops cf. delticus Thomas, 1923

Specimens examined: One male subadult collected in the wet season (MUSM 44156), and one female adult collected in the dry season (MUSM 44455), both collected at subcanopy level (Fig. 2, Table 2).

Remarks: The specimens of this species are characterized by the following characters corresponding the ones described for the species by Barquez et al. (1999): small size (Forearm length: 47.40 - 49.30 mm), brown dorsal pelage, belly paler than the back, tail protruding from the uropatagium at least half of its length, rostrum slightly naked, pointed muzzle, smooth lips without pronounced folds, thick ears, rounded and widely separated in the crown, inner ear keel ends up behind the posterior border of the antitragus, sagittal and lambdoid crest poorly developed, basisphenoid pits moderately deep and rounded. The morphological differences among our specimens are probably related to sexual dimorphism or age as size and developed of lambdoid ridge. In Peru, this species was first reported from Iquitos, Loreto (Diaz 2011). This species also occurs in Colombia and Brazil. Its natural history, distribution and morphological differentiation is poorly known (Eger 2008).

Molossops temminckii (Burmeister, 1854)

Specimen examined: One male adult collected in the dry season (MUSM 44456), captured at the subcanopy level near to a small stream (Fig. 2, Table 2).

Remarks: Following Eger (2008) and by comparison with specimens of the MUSM mammal collection, this species is characterized by a small size (Forearm length: 31.30 mm), dark brown dorsal pelage and belly paler than the back, dorsal fur with pale base, at least half the length of the tail free, naked rostrum, triangular ears with slightly rounded tips and widely separated in the crown, pointed muzzle, smooth lips without folds, the upper lip tilted backwards coinciding with the lower lip. In Peru, M. temminckii is known only from two localities in Loreto: Curaray River mouth (AMNH 71634, Eger 2008), and Reserva Nacional Allpahuayo-Mishana (Hice et al. 2004). An additional specimen was found in the MUSM collection from Flor de Yarina, Samiria River, Loreto collected by V. Pacheco on August 2, 1980 (MUSM 799). This species also occurs in Colombia, Venezuela, and Guyana, southwestward through Ecuador, Bolivia, Paraguay, and Brazil, into Uruguay and northern Argentina (Eger 2008). This bat uses human dwellings or abandoned buildings as diurnal roosts (Eger 2008, Barquez & Diaz 2015).

Species accumulation.- The accumulation curve predicted 44 species for the wet season (a= 2.20, b= 0.05, a/b= 44), that is, 19 species more than those recorded in the mist nets. Whereas for the dry season 36 species were predicted (a=1.09, b=0.03, a/b= 36.33); 20 more than those recorded in the mist nets (Fig. 3). Both estimates satisfactorily fitted on the Clench model ([r.sub.wet] = 99.83%, [r.sub.dry] = 99.74%). In the wet season, we recorded 55.55% (25 species) odfrythe estimated richness by the Clench model; while for the dry season, only 47.10% (16 species) of the total ofestimated richness.

Relative abundance.- The greatest abundance occurred during the wet season with 25 recorded species (21.88 ind/ NN), where Carolliaperspicillata (4.69 ind/NN), Glossophaga soricina (2.50 ind/NN), and Phyllostomus hastatus (2.19 ind/ NN) were the most abundant species. During the dry season, the species richness and relative abundance were unexpectedly low (11.26 ind/NN), only 16 species were recorded. In this season, Artibeus obscurus (3.58 ind/NN), A. planirostris (2.30 ind/NN), and C. perspicillata (1.28 ind/NN) were the most abundant species. In general, C. perspicillata (5.97 ind/NN) and A.planirostris (5.46 ind/NN) were the most abundant in the study area (Table 1).

The frugivorous bats were the best represented trophic guild, in wet (58.11%, RA= 13.44 ind/NN) and dry season (84.44%, RA= 9.72 ind/NN), followed by the insectivorous guild (wet season: 22.97%, RA= 4.06 ind/NN; dry season: 11.11%, RA= 1.02 ind/NN). Whereas, the nectarivorous (wet season: 16.22%, RA= 3.75 ind/NN; dry season: 2.22%, RA= 0.26 ind/NN) and carnivorous guild (wet season: 1.35%, RA= 0.31 ind/NN; dry season: 2.22%; RA= 0.26 ind/NN) fluctuated in abundance. Desmodus rotundus, the only hematophagous bat, was recorded in the wet season (1.35%, RA= 0.31 ind/NN) (Table 1).

Similarity.--Purus shared more similarities in bat species with Cusco Amazonico (40 shared species, distance: 350 km) and Parque Nacional Manu (50 shared species, distance: 270 km). The northern localities form a different cluster with low similarities (Fig. 4). Mantel test showed that the similarity indexes among pairs of localities and geographical distance had a low correlation (R= 0.473, p<0.01, Fig. 4).

Discussion

Our study is the first on bat diversity from La Novia river and the second assessment for the Purus province. We increased the list of bats for Purus from 56 to 60 species, which included two new records for the Ucayali department. The first report for Purus was conducted in the Balta community, at 60 km NW from the RLN, and was a compilation of several expeditions in different years with different sampling efforts (Voss & Emmons 1996). These new records suggest that the true diversity of Purus is still unknown and more studies are needed. Purus still maintains an extensive primary forest with almost no deforestation (Mena 2016) representing a suitable place to study the diversity and assemblage patterns of the biota.

Despite having a total sampling effort of 725 NN, greater than the effort employed in other Peruvian localities (Medina et al. 2015 [n= 43 species, 284 NN]; Medina et al. 2016 [n= 27 species, 136 NN]), the species' accumulation curves suggested that many more species could be captured. Also, at least 24 species occurring in Balta could also be present in RLN: Rhynchonycteris naso, Saccopteryx leptura, Noctilio albiventris, Gardnerycteris crenulatum, Macrophyllum macrophyllum, Micronycteris megalotis, Trinycteris nicefori, Lophostoma brasiliense, L. carrikeri, Tonatia saurophila, Anoura caudifer, A. peruana, Choeroniscus minor, Artibeus cinereus, A. concolor, Platyrrhinus brachycephalus, Sturnira tildae, Uroderma magnirostrum, Vampyriscus bidens, Vampyrodes caraccioli, Thyroptera tricolor, Eptesicus brasiliensis, E. furinalis, Lasiurus blossevillii, L. ega, Myotis riparius, Cynomops abrasus, and C. paranus (Voss & Emmons 1996).

The family Phyllostomidae was the most abundant and rich in species (24 species), which is comparable to other reports in different localities from the Peruvian Amazon (Hice et al. 2004, Solari et al. 2006, Medina et al. 2015). This pattern probably is due to the sampling method using mist nets, which is the most effective for catching phyllostomid bats (Kingston 2016). We suggest using other methods such as ultrasound detectors to increase the number of species, especially those that fly above the canopy (Kingston 2016), and roosting exploration (Voss et al. 2016)

Our results also suggest a seasonal change in the bat community, evidenced in the composition, relative abundance of species, and percentage of the trophic guilds by season. We found fewer records in the dry season despite having a greater sampling effort (dry: 391 NN versus wet: 334 NN). A similar finding was reported in Allpahuayo-Mishana (Hice et al. 2004) where the authors recorded less bat diversity in the dry season than in the wet season; however, the abundance of the RLN was much lower than Allpahuayo-Mishana. We suggest that more studies are needed to test this pattern in lowland forests (Hice et al. 2004, Klingbeil & Willig 2010).

Several authors found that seasonality influences diet diversification and dispersion of bats for foraging food resources (as fruits or flowers), producing a remarkable variation in the bat assemblages between seasons, for example, it is known that "opportunistic" bats can adapt to available resources in the dry season, as a survival strategy, so they are not greatly affected by seasonality (Giannini & Kalko 2004, Klingbeil & Willig 2010, Ramos-Pereira et al. 2010, Garcia-Garcia & Santos-Moreno 2014). This last pattern has been registered for some frugivorous and nectarivorous bats as Carollia perspicillata, C. brevicauda, Glossophaga soricina, and Artibeus jamaicensis (Heithaus et al. 1975, Fleming & Heithaus 1986, Hice et al. 2004), of which two first also were abundant in the RLN.

Pacheco et al. (2013) found that similarity index is inversely proportional to the linear geographic distance among sampled sites for montane rodents, whereas Hice et al. (2004) found the same pattern for bats in rainforests. However, our analyses found a low correlation between those variables, which might suggest bat assemblages are structured by some factor different to geographic proximity. Although, different sampling effort could explain this result, we suggest to continue investigating this pattern with more detail. -Purus has much less inventory effort than Manu or Cusco Amazonico or the northern areas as Iquitos and Allpahuayo-Mishana.

On the other hand, it is likely that bat species from Cusco Amazonico or Parque Nacional Manu (found below 500 m elevation) also occur in Purus, because there are no significant geographic barriers for volant mammals among those localities. This potential species occurring in Purus are: the emballonurids Diclidurus albus, Peropteryx kappleri, P. leucoptera, and Saccopteryx leptura, the phyllostomids Anoura caudifer, A. peruana, Artibeus concolor, A. cinereus, A. glaucus, A. gnomus, Choeroniscus minor, Diaemus youngi, Diphylla ecaudata, Enchisthenes hartii, Gardenycteris crenulatum, Glossophaga commissarisi, Lichonycteris degener, Lonchophylla handleyi, Lophostoma brasiliense, L. carrikeri, Macrophyllum macrophyllum, Micronycteris megalotis, Phyllostomus discolor, Sphaeronycteris toxophyllum, Sturnira magna, Sturnira tildae, Tonatia saurophila, Uroderma magnirostrum, Vampyriscus bidens, Vampyrodes caraccioli, and Vampyrum spectrum, the mormoopid Pteronotus gymnonotus, the noctilionids Noctilio albiventris, and N. leporinus, the furipterid Furipterus horrens, the thyropterids Thyroptera discifera, and T. lavali, the molossids Cynomops abrasus, C. milleri, C. paranus, Eumops auripendulus, E. trumbulli, and Molossus rufus, and the vespertilionids Eptesicus brasiliensis, Lasiurus blossevillii, L. ega, and Myotis riparius (Voss & Emmons 1996, Solari et al. 2006, Gardner 2008, Quintana et al. 2009).

Although Purus maintains still large areas of pristine forests, it is under serious threats due to a terrestrial connectivity Project between Purus (Ucayali department) and Inapari (Madre de Dios department) (Draft Law No. 0075-2016-CR). The impact of this project is estimated to be highly negative for local residents and biodiversity, it will generate newer environmental problems and social risks for Ucayali department, as is happening in Madre de Dios department due to the construction of the Interoceanic highway: land use change, illegal logging and hunting, invasion of uncontacted indigenous territory and social problems (Naughton-Treves 2004, Pieck 2013, Aguilar-Amuchastegui et al. 2014, Goldstein 2015). The construction of roadways and other infrastructure was proposed to be highly damaging to biodiversity in many countries (Spellerberg 1998, Laurance et al. 2009, Benitez-Lopez et al. 2010, Daigle 2010).

Conservation measures based on research and the implementation of biodiversity monitoring stations in this region are necessary and should include the participation of local populations and stakeholders to ensure that conservation is not considered an "obstacle" but a way of progress.

Acknowledgments

We thank World Wildlife Fund (WWF Peru) for the Fieldwork Travel Grants. We also thank Maribel Taco, Rocio Bardales, Carlos Ruelas, Mercedes Molina, Lisset Gomez, Pedro Huanca, and the MABOSINFRON personnel for their participation in the fieldwork; Jose Luis Mena for his support in this study, and Ruben M. Barquez for the confirmation of Eumops cf. delticus; finally, the Ministerio de Agricultura y Riego (MINAGRI) for the research permit (Resolucion de Direccion General No. 0125-2015-SERFOR-DGGSPFFS).

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Appendix 1: Species recorded from the Rio La Novia Conservation Concession. Family Emballonuridae: 1. Peropteryx macrotis. 2. Saccopteryx bilineata. Family Molossidae: 3. Eumops cf. delticus. 4. Molossops temminckii. Family Phyllostomidae: 5. Carollia benkeithi. 6. Carollia brevicauda. 7. Carollia perspicillata. 8. Rhinophylla pumilio 9. Glossophaga soricina. 10. Hsunycteris thomasi. 11. Lophostoma silvicolum. 12. Phylloderma stenops. 13. Phyllostomus elongatus. 14. Phyllostomus hastatus. 15. Trachops cirrhosus. 16. Desmodus rotundus. 17. Artibeus lituratus. 18. Artibeus obscurus. 19. Artibeus planirostris. 20. Chiroderma trinitatum. 21. Chiroderma villosum. 22. Dermanura anderseni. 23. Mesophylla macconnelli. 24. Platyrrhinus incarum. 25. Platyrrhinus infuscus. 26. Uroderma bilobatum 27. Vampyressa thyone. Family Vespertilionidae: 28. Myotis albescens. 29. Myotis nigricans. 30. Myotis simus.

Dennisse Ruelas (1) *, Victor Pacheco (1,2), Nadia Espinoza (1), and Christian Loaiza (1)

(1) Universidad Nacional Mayor de San Marcos, Museo de Historia Natural, Av. Arenales 1256, Lima 11, Peru.

(2) Universidad Nacional Mayor de San Marcos, Facultad de Ciencias Biologicas, Instituto de Ciencias Biologicas "Antonio Raimondi".

* Autor para correspondencia

E-mail Dennisse Ruelas: dennisse.ruelas@unmsm.edu.pe

E-mail Victor Pacheco: vpachecot@unmsm.edu.pe

E-mail Nadia Espinoza: ncelujan@gmail.com

E-mail Christian Loaiza: christian.loaiza@unmsm.edu.pe

Funding: This study was founded by Travel Grants of World Wildlife Peru: TD 10 - TD 16, TD 96 - TD 99, TE 01 and TE 02

Presentado: 30/12/2017

Aceptado: 25/04/2018

Publicado online: 25/09/2018

Author contributions:

DR designed the research, collected the specimens, analyzed the data, and drafted the article. VP contributed in the collection of specimens, research design, data analysis, and critically reviewed the draft. NE contributed in the collection of specimens, photo edition, measuring specimens and reviewing the draft. CL contributed in the collection of specimens and reviewing the draft. All authors approved the final draft. There is no conflict of interest among the authors.

Research permit:

Resolucion de Direccion General No. 0125-2015-SERFOR-DGGSPFFS

Caption: Figure 1. Map of Rio La Novia Conservation Concession, the study area is shown with a black star, a projection is shown on the upper left edge.

Caption: Figure 2. Skull and mandible of Eumops cf. delticus (left: MUSM 44455, female; center: MUSM 44156, male) and Molossops temminckii (right: MUSM 44456, male) recorded in La Novia river sector. Scale: 10 mm.

Caption: Figure 3. Accumulation curves of bats from Rio La Novia Conservation Concession, in A) wet season, and B) dry season.

Caption: Figure 4. Similarity based on the Sorensen coefficients of eight localities of the Peruvian Amazonian. Purus: Balta and Rio La Novia Conservation Concession; Iquitos: Iquitos city and surroundings.; PNSD: Parque Nacional Sierra del Divisor; PNM: Parque Nacional del Manu; RNAM: Reserva Nacional Allpahuayo-Mishana; CIJH: Centro Investigaciones Jenaro Herrera; CAM: Cusco Amazonico. See the similarity values in Table 3.
Table 1. Species richness and relative abundance of bats from the RLN.
Trophic guild: C: carnivorous, F: frugivorous, I: insectivorous, N:
nectarivorous, H: hematophagous. The main guild is shown before the
parentheses. Relative abundance: WS = wet season, DS = dry season. New
records: (a) = for Purus, (b) = for Ucayali.

                                          Relative abundance

Family / Species               Guild        WS         DS

Emballonuridae
Peropteryx macrotis (a)          I
Saccopteryx bilineata            I         0.31
Phyllostomidae
Artibeus anderseni               F                    0.51
Artibeus lituratus            F(I, N)                 0.26
Artibeus obscurus             F(I, N)      1.88       3.58
Artibeus planirostris         F(I, N)      1.56       2.30
Carollia benkeithi            F(I, N)      0.31
Carollia brevicauda           F(I, N)      0.31       0.77
Carollia perspicillata        F(I, N)      4.69       1.28
Chiroderma trinitatum         F(I, N)      0.31
Chiroderma villosum           F(I, N)      0.63       0.26
Desmodus rotundus                H         0.31
Glossophaga soricina          N(I, F)      2.50       0.26
Hsunycteris thomasi           N(I, F)      1.25
Lophostoma silvicolum         I(F, N)      0.31
Mesophylla macconnelli        F(I, N)      0.31       0.26
Phylloderma stenops           I(F, N)      0.31
Phyllostomus elongatus        I(F, N)      0.31
Phyllostomus hastatus         I(F, N)      2.19
Platyrrhinus incarum          F(I, N)      1.25       0.26
Platyrrhinus infuscus         F(I, N)      0.63
Rhinophylla pumilio           F(I, N)      0.31
Sturnira sp.                  F(I, N)      0.31
Trachops cirrhosus (a)        C(I, F)      0.31       0.26
Uroderma bilobatum            F(I, N)      0.63       0.26
Vampyressa thyone             F(I, N)      0.31
Molossidae
Eumops cf. delticus (a,b)        I         0.31       0.26
Molossops temminckii (a,b)       I                    0.26
Molossus molossus                I
Vespertilionidae
Myotis albescens                 I                    0.26
Myotis nigricans                 I                    0.26
Myotis simus                     I         0.31
TOTAL                                     21.88      11.26

                                   Vouchers (MUSM)

Family / Species

Emballonuridae
Peropteryx macrotis (a)       44151-44154
Saccopteryx bilineata         44155
Phyllostomidae
Artibeus anderseni            44473, 44474
Artibeus lituratus            44458
Artibeus obscurus             44157-44162, 44459-44465
Artibeus planirostris         44163-44167, 44466
Carollia benkeithi            44168
Carollia brevicauda           44467-44469
Carollia perspicillata        44170-44184, 44469-44471
Chiroderma trinitatum         44185
Chiroderma villosum           44186, 44187, 44472
Desmodus rotundus             44188
Glossophaga soricina          44189-44196, 44475
Hsunycteris thomasi           44197-44200
Lophostoma silvicolum         44201
Mesophylla macconnelli        44202, 44476
Phylloderma stenops           44203
Phyllostomus elongatus        44204
Phyllostomus hastatus         44206-44211
Platyrrhinus incarum          44212-44215, 44477
Platyrrhinus infuscus         44216, 44217
Rhinophylla pumilio           44218
Sturnira sp.
Trachops cirrhosus (a)        44219, 44478
Uroderma bilobatum            44220, 44221, 44479
Vampyressa thyone             44222
Molossidae
Eumops cf. delticus (a,b)     44156, 44455
Molossops temminckii (a,b)    44456
Molossus molossus             44457
Vespertilionidae
Myotis albescens              44480
Myotis nigricans              44481
Myotis simus                  44223
TOTAL

Table 2. External and cranial measurements of Eumops cf. delticus and
Molossops temminckii. Measurements are in millimeters and ordered as
it follows, above: mean [+ or -] standard deviation (number of
specimens), and below the range. Sex: m = male, f = female.

                                         Eumops cf. delticus

Measurements                Diaz (2011)     MUSM 44156     MUSM 44455
                                (f)            (m)            (f)

Total length                   110.00         101.00         105.00
Tail length                    45.00          33.00          39.00
Hind foot length               10.00           9.00           7.00
Ear length                     22.00          19.00          22.50
Forearm length                 47.68          47.40          49.30
Greatest skull length          18.38          18.27          18.86
Condylobasal length                           17.34          18.09
Condyle-incisive length        18.11          18.17          18.69
Condyle-canine length                         17.13          17.57
Postorbital constriction        4.42           4.22           4.28
Braincase width                 8.78           8.80           8.97
Zygomatic width                11.08          11.32          11.69
Mastoid width                  10.17           9.83          10.29
Palatal length                  7.13           7.03           7.09
Maxilar toothrow length         6.93           7.40           7.61
Canine width                    4.42           4.98           5.02
M1 width                                       7.46           7.32
M2 width                        7.67           8.19           7.94
M3 width                                       8.6            8.31
Braincase height                               6.7            7.32
Palatal width                                  4.42           4.70
Foramen magnum width                           5.26           5.76
Mandibular length              13.18          13.07          13.46
Mandible height                                1.74           1.69
Mandibular toothrow             7.79           8.17           8.78
  length

                                      Molossops temminckii

Measurements                 Barquez et al. (1999)      MUSM 44456
                                                           (m)

Total length                76.50 [+ or -] 5.01 (33)      72.00
                                  60.00-84.00
Tail length                 27.80 [+ or -] 3.41 (32)      25.00
                                   21.0-34.00
Hind foot length                                           6.50
Ear length                                                11.00
Forearm length                                            31.30
Greatest skull length       13.40 [+ or -] 0.32 (40)      14.15
                                  12.70-14.10
Condylobasal length         13.00 [+ or -] 0.39 (42)      13.72
                                  12.10-13.80
Condyle-incisive length                                   14.08
Condyle-canine length                                     13.47
Postorbital constriction    3.70 [+ or -] 0.16 (46)        4.07
                                   3.40-4.10
Braincase width             7.10 [+ or -] 0.18 (40)        7.68
                                   6.80-7.60
Zygomatic width             8.80 [+ or -] 0.25 (19)        9.68
Mastoid width               8.30 [+ or -] 0.35 (38)        7.98
                                   7.70-9.30
Palatal length              5.90 [+ or -] 0.22 (37)        6.37
                                   5.50-6.40
Maxilar toothrow length     5.30 [+ or -] 0.19 (47)        5.59
                                   4.80-5.70
Canine width                3.70 [+ or -] 0.16 (44)        3.94
                                   3.40-4.10
M1 width                                                   6.00
M2 width                                                   6.42
M3 width                    6.40 [+ or -] 0.21 (45)        6.82
                                   6.00-6.80
Braincase height                                           5.40
Palatal width                                              3.71
Foramen magnum width                                       4.28
Mandibular length           10.10 [+ or -] 0.30 (37)      10.05
                                   9.50-10.80
Mandible height                                            1.48
Mandibular toothrow         5.80 [+ or -] 0.21 (41)        6.28
  length                           5.40-6.30
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Title Annotation:TRABAJOS ORIGINALES
Author:Ruelas, Dennisse; Pacheco, Victor; Espinoza, Nadia; Loaiza, Christian
Publication:Revista peruana de biologia
Date:Aug 1, 2018
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