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Escarabajos (coleopteros) de Peru: un reconocimiento de las familias. Attelabidae Billberg, 1820.

Beetles (Coleoptera) of Peru: A Survey of the Families. Attelabidae Billberg, 1820

Introduction

Curculionid beetles have been poorly studied in Peru. There are many separate descriptions of species (Erichson 1847; Kirsch 1874; Voss 1954; Howden 2001; Hespenheide 2018; etc.). General information about the species of Peru is provided by Wood and Bright (1992), Wibmer and O'Brien (1986), Rheinheimer (2004), and Sforzi and Bartolozzi (2004). Recently, checklists of some groups (Brentidae, Scolytinae, Platypodinae) were compiled as part of the 'Beetles of Peru' (see Chaboo 2015; Kirkendall 2017; Mantilleri et al. 2017; Smith et al 2017).

The leaf-rolling weevils, or family Attelabidae, are geographically widespread (Legalov 2007, 2008a, 2008b, 2010) and currently comprise more than 170 genera and about 1300 species in the world. Attelabidae includes two subfamilies, Attelabinae and Apoderinae and it is represented in the New World by the subfamily Attelabinae with three tribes. Data on Attelabidae from Peru are published by Kirsch (1874), Voss (1925, 1929, 1937), Legalov (2004, 2007, 2008a) and Hamilton (2005).

As their common name suggests, leaf-rolling weevils actually cut leaves of host trees and roll the leaves into tubes (called "nidus") where they live and eat. The adult cuts the mid-rib of the leaf, lets it go limp, then bits along the lower surface to make notches where it folds the leaf with its legs (Kono 1930; Legalov 2007). The largest number of species of Attelabidae examined develops on cosmopolitan and tropical plant families. In all the zones, the richest fauna of Attelabidae was found on representatives of such widespread families as Rosaceae and Fagaceae, and also on cosmopolitan Betulaceae. Fagaceae, Myrtaceae, and Lauraceae are very important food sources for tropical species (Legalov 2005). Biology of Attelabidae is summarized in Legalov (2007).

The genus Omolabus includes 76 species distributed in Central and South America but absent in the West Indies (Voss 1925; Hamilton 2005; Legalov 2007, 2008b). Species of the genus have been reproductively associated with plants from families Anacardiaceae, Myrtaceae, Tiliaceae and Euphorbiaceae (Voss, 1953; Hamilton 2005). Larvae develop in curled fragments of leaves (Wheeler et al. 2013).

In this article, I describe a new species and present the first checklist of the Attelabidae of Peru. This is another installment in Caroline Chaboo's Beetles of Peru' project.

Material and methods

The studied specimens are kept at the Museo de Historia Natural, San Marcos University (Peru: Lima)--MUSM, Institute of Systematic and Ecology of Animals (Russia: Novosibirsk)--ISEA, collection of A.V. Korshunov (Russia: Kemerovo)--KKC, collection of E.V. Obidin (Kazakhstan: Temirtau)--EOC, Zoological Museum of Moscow State University (Russia: Moscow)--ZMM, Lund University (Sweden: Lund); Museo Civico di Storia Naturale "Giacomo Doria" (Italy: Genova), Museum fur Tierkunde, Senckenberg Naturhistorische Sammlungen Dresden (Germany: Dresden), Natural History Museum (UK: London); Petr Kresl Collection (Czech Republic: Janovice nad Uhlavou), Zoological Institute of Russian Academy of Sciences (Russia: St. Petersburg). Description, body measuring, and photographs were performed using the Zeiss Stemi 2000-C dissecting stereomicroscope.

Results

Nineteen species from eight genera of two tribes are documented for the fauna of Attelabidae from Peru. Below, I describe a new species based on 9 specimens. Locality records for all 18 species now documented in Peru are available in the original citations. Future field collections and study of specimens from more museums may uncover more diversity.

Description of new species

Omolabus (Sternolaboides) sokolovi Legalov, new species

(Figs. 1-5)

Diagnosis. The new species is very similar to Omolabus (Sternolaboides) bogotensis Legalov, 2007 from Colombia but differs in the elytra weakly narrowed to apex and wider pronotum. It is distinguished from O. (S.) ecuadorensis in the distinct dorsal posthumeral humplike protuberance on the elytra, weaker convex pronotum and form (narrow and long) of the basal sclerite of the endophallus.

Description. Body black, lustrous, naked. Pronotum usually brownish or brown.

Male: Head conical, elongate, distinctly widened at base. Rostrum quite long, arcuate, widened to apex, densely punctate, with two longitudinal striae from antennal insertion to base, with apico-lateral denticulate on each side. Antennae inserted near middle dorso-laterally. Eyes large, oval, weakly convex. Forehead narrow, weakly concave, sparsely punctate. Temples elongate, weakly transversely wrinkled. Vertex flattened, finely transversely wrinkled. Antennae long, reaching temples. Antennomere 1 oval. Antennomere 2 oval, slightly shorter and narrower than antennomere 1. Antennomeres 2-8 conical. Antennomere 3 shorter and narrower than antennomere 2. Antennomere 4 shorter and equal in wide to antennomere 3. Antennomere 5 shorter and slightly wider than antennomere 4. Antennomere 6 slightly shorter than Antennomere 5. Antennomere 7 slightly wider than antennomere 6. Antennomere 8 distinctly wider than Antennomere 7. Club compact, 0.6 times as long as antennomeres 1-8 combined. Antennomeres 9 and 10 subequal. Antennomere 11 distinctly wider than antennomere 10.

Pronotum almost conical, widest at base. Sides almost straight. Disk convex, sparsely punctate, near slightly transversely wrinkled. Scutellum almost rectangular, wide.

Elytra slightly longer than wide, with dorsal posthumeral hump-like protuberance. Greatest width in humeri. Humeri strongly convex. Intervals flat, almost smooth. Striae distinct, without deep points.

Precoxal portion of prosternum long, transversely wrinkled, concave in middle. Procoxal cavities contiguous. Postcoxal portion short. Metaventrite slightly longer than metacoxa. Metanepisternum wide, finely punctate. Metepimera wide-triangular, punctate.

Abdomen convex, punctate. Ventrites subequal in lenghth. Pygidium convex, densely punctate.

Legs long. Forelegs elongated. Profemora enlarged. Protibiae long, weakly curved, with long mucro. Meso- and metatibiae shorter, weakly biconcave, weakly expanded to apex. Tarsi long. Tarsomere 1 long-conical, longer than tarsomere 2. Tarsomere 2 wide-conical, flattened. Tarsomere 3 bilobed. Tarsomere 5 elongate. Claws long, fused at base.

Length of body (without rostrum): 5.2-6.0 mm. Length of rostrum: 1.1-1.4 mm.

Female: Rostrum shorter. Prementum without tooth. Antennae inserted closer to rostrum base. Temples shorter. Precoxal part of prosternum shorter. Tibiae with mucro and premucro. Protibiae shorter and wider.

Length of body (without rostrum): 4.7-5.4 mm. Length of rostrum: 0.8-1.1 mm.

Type material. Holotype, male (MUSM), PERU, Junin Dep., Satipo Prov., near Rio Venado vill., 11[degrees]11'787"S, 74[degrees]46'168"W, 1122 m, 23.XI-6.XI.2014, A. Sokolov. Paratype: female (ISEA), female (MUSM), idem; male (EOC), idem, 21.X.2013; 4 males (ISEA), female (EOC), 22.IX-18.X.2017, idem; female (ISEA), female (KKC), idem, 15-28.I.2016, A. Korshunov; female (ZMM), Satipo env., Calabaza vill., 2500 m, V.2004, A. Sokolov.

Etymology. The species named in honour of Dr. Alexander V. Sokolov (Russia), who collected this species.

Remarks. The new species belongs to the genus Omolabus based on the femora without teeth of males and weakly convex eyes. It is placed in the subgenus Sternolaboides Legalov, 2007 because the humeri without tooth, apex of the elytra without blades, pronotum without protuberance or tooth near apex, rostrum shorter than pronotum, and the basal sclerite of the endophallus almost symmetric.

Key to Species of Subgenus Sternolaboides

1. Elytra with distinct dorsal posthumeral hump-like protuberance. 2

--. Elytra without dorsal posthumeral hump-like protuberance. 3

2. Elytra weakly narrowed to apex. Pronotum wider, width in middle 1.5 times as long as length. Peru.

Omolabus sokolovi Legalov, new species

--. Elytra more narrowed to apex. Pronotum narrower, width in middle 1.4 times as long as length. Colombia.

Omolabus bogotensis Legalov, 2007

3. Elytra narrowed to apex. Brazil.

Omolabus curticornoides Legalov, 2007

--. Elytra almost rectangular. 4

4. Pronotum more densely punctate, with two impressions. Brazil.

Omolabus niger Legalov, 2007

--. Pronotum smooth or sparsely punctate. 5

5. Eyes slightly convex. Protibia wider. Bolivia.

Omolabus bolovicus Legalov, 2007

--. Eyes stronger convex. Protibia narrower. 6

6. Pronotum slightly narrowed to apex. Armament of endophallus (Fig. 8). Ecuador, Peru. Omolabus ecuadorensis Legalov, 2007

--. Pronotum strongly narrowed to apex. 7

7. Pronotum stronger narrowed to apex. Armament of endophallus (Fig. 6). Columbia, Peru. Omolabus curticornis Voss, 1929

--. Pronotum weaker narrowed to apex. Armament of endophallus (Fig. 7). Brazil. Omolabus bowringi Voss, 1938

New Material

Hybolabus ater (Olivier, 1789)

Material. female (KKC), PERU, Junin Dep., Satipo Prov., near Rio Venado vill., 11[degrees]11787''S, 74[degrees]46'168"W, 1122 m, 15-28.I.2016, A. Korshunov; male (ISEA), PERU, Loreto, Padre Cocha, 20.I.2007, R. Westeruijn.

Omolabus (Perulabus) peruanus Legalov, 2004

Material. Male (ZMM), PERU, Iquitos env., Botanical garden, 5-8.VI.2004, A. Sokolov.

Omolabus (Pseudomolabus) westerduijni Legalov, 2008

Material. Female (ZMM), PERU, Iquitos env., Botanical garden, 5-8.VI.2004, A. Sokolov.

Omolabus (Sternolaboides) ecuadorensis Legalov, 2007

Material. Female (ZMM), PERU, Iquitos env., Botanical garden, 5-8.VI.2004, A. Sokolov.

Check list

Tribe Eusceuni VOSS, 1925

Subtribe Cunolabina Legalov, 2003

Genus Clinolabus Jekel, 1860

1. Clinolabus flavomarginatus Voss, 1925 (Fig. 9, Madre de Dios, square)

=Clinolabus boliviensis Janczyk, 1960

Subtribe Euscelina Voss, 1925

Genus Vossieuscelus Legalov, 2007

2. Vossieuscelus huanucus (Legalov, 2004) (Fig. 9, Huanuco, circle)

3. Vossieuscelus lineatus (Voss, 1925) (Fig. 9, Pasco, Huanuco, rhombus)

= Euscelus lineatus f. geniculata Voss, 1937

4. Vossieuscelus loretoensis Legalov, 2008 (Fig. 11, Loreto, circle)

Genus Alleuscelus Voss, 1937

5. Alleuscelus (Alleuscelus) violaceipennis Voss, 1937

Genus Euscelus Schoenherr, 1833

6. Euscelus (Meteusceliodes) peruanus Voss, 1925 (Fig. 9, Madre de Dios, square)

Genus Pheleuscelus Jekel, 1860

7. Pheleuscelus (Pheleusceloides) subimpressus (Voss, 1925) (Fig. 9, Loreto, hexahedron)

= Euscelus subimpressus f. testaceicornis Voss, 1937

Genus Emphyleuscelus Voss, 1925

8. Emphyleuscelus (Emphyleuscelus) iquitensis (Legalov, 2004) (Fig. 9, Loreto, triangle)

Tribe Hybolabini Voss, 1925

Subtribe Hybolabina Voss, 1925

Genus Hybolabus Jekel, 1860

9. Hybolabus ater (Olivier, 1789) (Fig. 10, Loreto, circle)

= Attelabus atratus Fabricius, 1801

= Attelabus cupripennis Perty, 1832

= Attelabus variabilis Gyllenhal, 1833

= Attelabus sallei Jekel, 1860

= Hybolabus ater ssp. peruanus Voss, 1925

= Hybolabus ater f. ruficollis Voss, 1938

Subtribe Omolabina Legalov, 2003

Genus Neoxestolabus Voss, 1943

10. Neoxestolabus (Hamiltonilabus) megalomus (Hamilton, 2005) (Fig. 11, Loreto, circle)

Genus Omolabus Jekel, 1860

11. Omolabus (Perulabus) peruanus Legalov, 2004 (Fig. 9, Loreto, triangle)

12. Omolabus (Pseudomolabus) tricolor (Kirsch, 1874) (Fig. 11, Pasco, Huanuco, square)

13. Omolabus (Pseudomolabus) westerduijni Legalov, 2008 (Fig. 12, Loreto, circle)

14. Omolabus (Paralabus) lituratus Voss, 1938 (Fig. 9, Madre de Dios, square)

15. Omolabus (Xestolabus) rubellus (Voss, 1925) (Fig. 9, Madre de Dios, square)

16. Omolabus (Sternolaboides) sokolovi Legalov, new species (Fig. 12, Junin, hexahedron)

17. Omolabus (Sternolaboides) curticornis Voss, 1929 (Fig. 10, Madre de Dios, rhombus)

18. Omolabus (Sternolaboides) ecuadorensis Legalov, 2007 (Fig. 12, Loreto, circle)

doi: http://dx.doi.org/10.15381/rpb.v26i1.15908

Literature Cited

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Erichson GF 1847. Conspectus Insectorum Coleopterum, quae in republica Peruana observata sunt. Archiv for Naturgeschichie 13: 67-185.

Hamilton RW 2005. Omolabus Jekel (Coleoptera: Attelabidae) in north and central America. Zootaxa 986: 1-60.

Howden AT 2001. A new species of Pandeleteius from Peru. Revue Francaise d' Entomologie 23 (2): 171-175.

Kirkendall LR 2017. Beetles (Coleoptera) of Peru: a survey of the families. Curculionidae: Platypodinae. The Coleopterists Bulletin 71 (1):99-115. DOI: 10.1649/0010065X-71.1.99

Kirsch T 1874. Beitrage zur Kenntniss der Peruanischen Kaferfauna auf Dr. Abendroth's Sammlungen basirt. Berliner Entomologische Zeitschrift 18 (3-4): 385-432.

Kono H 1930. Die biologischen Gruppen der Rhynchitinen, Attelabinen und Apoderinen. Journal of the Faculty of Agriculture, Hokkaido Imperial University. Sapporo 29 (1): 1-36.

Legalov AA 2004. New data of the leaf-rolling weevils (Coleoptera: Rhynchitidae, Attelabidae) of the world fauna with description of 35 new taxons. Baltic Journal of Coleopterology 4 (1): 63-88.

Legalov AA 2005. Trophic links of leaf-rolling weevils (Coleoptera, Rhynchitidae and Attelabidae). Entomological Review 85 (4): 361-370.

Legalov AA 2007. Leaf-rolling weevils (Coleoptera: Rhynchitidae, Attelabidae) of the world fauna. Novosibirsk: Agro-Siberia. 523 p.

Legalov AA 2008a. To the knowledge of the leaf-rolling weevils of subfamily Attelabinae (Coleoptera, Attelabidae). Altaiskii Zoologichesky Zhurnal 2: 69-77, 80-82.

Legalov AA 2008b. To the knowledge of Attelabid-beetles (Coleoptera) of the world fauna // Acta biologica Universitatis Daugavpiliensis. Acta biologica Universitatis Daugavpiliensis 2 (2): 193-226.

Legalov AA 2010. Contribution to the knowledge of the leaf-rolling weevils (Coleoptera, Rhynchitidae, Attelabidae). Amurskii Zoologicheskii Zhurnal 2 (1): 13-38, I-X.

Mantilleri A, L Bartolozzi & A Sforzi. 2017. Brentidae of Peru (Coleoptera: Curculionoidea). Zootaxa 4221 (1): 60. Doi: http://dx.doi.org/10.11646/zootaxa.4221.1.2

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Acknowledgements

I am grateful to M.VL. Barclay (UK: London), R. Danielsson (Sweden: Lund), O. Jaeger (Germany: Dresden), K.-D. Klass (Germany: Dresden), A.V. Korshunov (Russia: Kemerovo), B.A. Korotyaev (Russia: St. Petersburg), P. Kresl (Czech Republic: Janovice nad Uhlavou), N.B. Nikitsky (Russia: Moscow), E.V Obidin (Kazakhstan: Temirtau), R. Poggi (Italy: Genova), A.V Sokolov (Russia: Moscow), for the opportunity to study the material and to J. M. Morrone for his reviewing of the manuscript. I also thank Caroline Chaboo for motivating the study and commenting on an early draft.

Andrei A. Legalov (1,2)

(1) Institute of Systematics and Ecology of Animals of the Siberian Branch of the Russian Academy of Sciences, Russia

(2) Altai State University, Russia

Publicacion registrada en Zoobank/ZooBank article registered: LSIDurn:lsid:zoobank.org:pub:6C34BBEA-04C7-446B-8327-64F1A2FC0885

Acto nomenclatural/nomenclatural act: LSIDurn:lsid:zoobank.org:act:F19261C5-A71F-48B1-B5C9-C868736B0AE9

Presentado: 23/09/2018

Aceptado: 29/01/2019

Publicado online: 18/03/2019

Correspondencia:

(1) Institute of Systematics and Ecology of Animals of the Siberian Branch of the Russian Academy of Sciences, Frunze str., 11, Novosibirsk 630091, Russia

(2) Altai State University, Lenina str., 61, Barnaul 656049, Russia Email Andrei Legalov: fossilweevils@gmail.com

Caption: Figures 1-5. Omolabus (Sternolaboides) sokolovi Legalov, new species. 1) habitus, dorsally, holotype. 2) habitus, dorsally, paratype, female. 3) tegmen, dorsally, holotype. 4) aedeagus, dorsally, holotype. 5). aedeagus, ventrally, holotype.

Caption: Figures 6-8. Omolabus (Sternolaboides) ssp., armament of the endophallus. 6). O. curticornis, 7). O. bowringi, lectotype, 8). O. ecuadorensis.

Caption: Figure. 9. Distribution of Attelabinae. Vossieuscelus huanucus, circle. Clinolabus flavomarginatus, square. Euscelus peruanus, Omolabus lituratus and O. rubellus, square. Vossieuscelus lineatus, rhombus. Pheleuscelus subimpressus, hexahedron. Emphyleuscelus iquitensis and Omolabus peruanus, triangle.

Caption: Figure. 10. Distribution of Hybolabini. Hybolabus ater, circle. Omolabus curticornis, rhombus.

Caption: Figure. 11. Distribution of Omolabus. Vossieuscelus loretoensis and Neoxestolabus megalomus, circle. Omolabus tricolor, square.

Caption: Figure. 12. Distribution of Attelabinae. Omolabus ecuadorensis and O. westerduijni, circle. O. sokolovi new species, hexahedron.
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Title Annotation:Trabajos originales
Author:Legalov, Andrei A.
Publication:Revista peruana de biologia
Date:Feb 1, 2019
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