Description of a new species of Orphinus Motschulsky, 1858 in Pakistan, with a key to known Himalayan species (Coleoptera: Dermestidae: Megatominae).
Representatives of Orphinus are distributed mainly in the Afrotropical, Indomalayan and Australasian ecozones (Hava 2013; Kadej & Hava 2013; Zahradnik & Hava 2014). Orphinus is currently split into 4 subgenera (Curtophinus Pic, Falsoorphinus Pic, Orphinus s. str., and Picorphinus Hava). With regard to the genus Orphinus Motschulsky, most of the Himalayan species (8 species, including the 1 described here) have been classified to the nominal subgenus. Only 1 species has been included in subgenus Falsoorphinus Pic (see Table 1). Nominal subgenus Orphinus s. str. consists of the species that can be distinguished from the rest of the subgenera by the following morphological features: relatively small, oval, and convex body; elytra with variable color patterns and pubescence; 11-segmented antennae and spherical rather than suboval last antennal club segment in males (Kadej & Kitano 2010; Kadej & Hava 2013). In contrast, subgenus Falsoorphinus Pic is defined by the following characters: a long and suboval male antennal terminal segment. In this paper, a new species of Orphinus from Pakistan is described.
Materials and Methods
Morphological structures (genitalia, antenna, abdominal segments IX-X, pygidium) were boiled for 3 to 10 min in 10% KOH, and placed in distilled water for about 1 h to clean and soften the cuticle. The structures such as genitalia, antenna, abdominal segments IX-X, and pygidium were placed on glycerin mounts. Morphological structures were examined with a Nikon Eclipse E 600[R] (Tokyo, Japan) phase contrast microscope, and a Nikon SMZ-800[R] (Tokyo, Japan) binocular microscope. Photographs were taken with a Canon 500D[R] (Taiwan) and a Nikon D5100[R] (Tokyo, Japan) camera under a Nikon Eclipse 80i[R] (Tokyo, Japan) and a Nikon SMZ-800[R] (Tokyo, Japan) microscope. Image stacks were processed using Combine ZM[R] (Hadley 2010).
The terminology used in this paper follows Kadej & Kitano (2010) and Kadej & Hava (2013). The distribution and classification used follow the world catalogs of Hava (2013). The following abbreviation denotes the type depository for the specimens of the new species: OUMNH Oxford University Museum of Natural History, Oxford, United Kingdom.
Dermestidae Latreille, 1807
Megatominae Leach, 1815
Megatomini Ganglbauer, 1904
Orphinus Motschulsky, 1858
Orphinus (s. str.) pakistanus sp. nov. (Figs. 1-11)
HOLOTYPE. Adult male, deposited at OUMNH. Type locality: PAKISTAN, Islamabad, 33[degrees]40>56>>N, 73[degrees]6>44>>E, 27-VII-2000, 700 m swept, mixed vegetation, Coll. Mann & McGavin / OUM-2002-013 Pres. Mann & McGavin, Hope Entomol. Coll. The type specimen possesses the following red label: "HOLOTYPE Orphinus pakistanus sp. nov. Kadej & Hava det. 2014."
Body oval, strongly convex, densely covered with subrecumbent simple setae, and visible punctuation (Figs. 1-4). Measurements for holotype: length from anterior margin of pronotum to apex of elytron 2.0 mm, median length of pronotum 0.6 mm, maximum width of pronotum 1.05 mm, length of elytron (suture) 1.7 mm, maximum width across elytra 1.2 mm. Ratio of width (across humeri) to length (of pronotum and elytra combined) 0.6:1. Dorsal and ventral integument dark brown with greyish pubescence (Figs. 1 and 2); antennae (Figs. 6 and 7), tarsi, and tibia light brown (femora brown, darker than tibia, Fig. 2). Distance between punctures on pronotum and elytra approximately the same as their diameter.
Head with large convex compound eyes, median ocellus distinct and well developed (Fig. 4). Frons with greyish pubescence (Fig. 4) and moderate punctuation (punctures smaller and shallower than those on pronotum and elytra). Antenna light brown, 11-segmented (Figs. 6 and 7). Antennal club of 2 segments: segment 1 short and transverse, segment 2 considerably larger (Figs. 6 and 7). Last segment of antennal club rounded; 5 times as long and nearly twice as wide as first (Fig. 7). Antennal fossa deeply excavated and occupying almost all of hypomeron; surface gently punctate (punctures are shallow and poorly visible), integument between punctures smooth; posterior area closed.
Pronotum punctate with lateral margin faintly visible from above. Posterior angles acute; posterior edge bisinuate, so that median flat-rounded lobe is located between 2 emarginations. Scutellum triangular, dark brown, small but visible (Fig. 1). Elytra parallel-sided, gently tapering at apical 1/3, each elytron densely punctate, those punctures slightly deeper than on pronotum. Elytra covered with greyish pubescence (Fig. 1). Prosternum punctate on disc, without impunctate median line. Metepisternum densely and conspicuously punctate. Abdomen densely punctate, punctures denser on 2nd to 5th visible ventrite, and with sublateral distal carinae on 1st visible ventrite. Posterior margin of 5th abdominal ventrite not impressed, without pair of tubercules or pair of sharp spines. Legs covered with stout setation. Tibiae without distinct teeth (tibial spines). Tarsus with 2 claws.
Male genitalia as in Figs. 10 and 11. Parameres deeply u-shaped, covered with short setae on the lateral margins as well as in the central and inner areas; longer setae present only on apex of parameres. Distal parts of parameres slightly curved inward. Penis (median lobe) with distal end pointing up; in frontal view straight (Figs. 10 and 11). Ninth abdominal segment (Fig. 9) spatula-like [spatuliform]; apex somewhat truncate; setae present on the dorsal and lateral margins, but only in the anterior part. Pygidium in basal part (from margin to 2/3 length of pygidium) with short setae; remaining area with densely located, slightly prominent, but longer setae (Fig. 5). Tenth abdominal segment pentagonal-like with flat apex and 3 prominent setae on dorsal margin in the anterior part (Fig. 8).
Female not known.
Pakistan (Islamabad Capital Territory).
By its unicolorous elytral integument and shape of the body, the new species closely resembles Orphinus (s. str.) nilgirensis Arrow, but differs from it and other species by the following morphological features: in Orphinus pakistanus Kadej & Hava, sp. nov., the elytra are without patterns or fasciae and possess uniform greyish setation; in O. nilgirensis Arrow, 4 spots with whitish setae are present on the elytra: one medial and another near the scutellum.
From cosmopolitan species O. (s. str.) fulvipes (Guerin-Meneville), the newly described species differs by the dark brown color of dorsal and ventral surfaces covered by greyish pubescence, whereas in O. fulvipes the dorsal and ventral surfaces are brown with brownish pubescence; likewise in O. pakistanus sp. nov. the ratio of width to length of last antennal segment in males is 0.85:1, in O. fulvipes 1:1; in O. pakistanus sp. nov. pronotum is convex, in O. fulvipes flattened. It also differs from the known Himalayan species by the characteristics mentioned in the key given below.
The specific epithet "pakistanus," derived from the country where the species was discovered: Pakistan.
Identification key for the Himalayan (1) species of Orphinus
1. -- Terminal antennomere circular--subgenus Orphinus (s. str.) 2
1'.-- Terminal antennomere elongate-oval--subgenus Falsoorphinus (each elytron with large humeral orange spot, not reaching suture and with orange spot in apical part Orphinus (F.) yeti Hava
2. -- Elytra unicolorous 3
2'.-- Elytra bicolorous 4
3. -- Elytra evenly covered with greyish setation Orphinus pakistanus Kadej & Hava, sp. nov.
3'.-- Elytra covered with 1 median and 1 scutelar spot of whitish setae Orphinus nilgirensis Arrow
4. -- Elytra with orange (or reddish) transverse band and apical Spot 5
4'.-- Elytra with only an orange-reddish transverse band, apical spot absent Orphinus unifasciatus Hava
5. -- Apical spot reaching posterio-lateral part of elytron; terminal antennomere of male 2-3 times larger than in female 6
5'.-- Apical spot isolated, not reaching posterio-lateral part of elytron; size of terminal antennomere of both sexes comparable Orphinus hartmanni Hava
6. -- Integument of dorsal surface brown; apical spot small, occupying less than 1/3 of each elytron 7
6'.-- Integument of dorsal surface black; apical spot large, occupying almost 1/3 of each elytron Orphinus jucundus Arrow
7. -- Elytral transverse band broad near lateral margin of elytra, while narrow near suture Orphinus kresli Hava
7'.-- Elytral transverse band evenly broad throughout (from lateral margin of elytra to suture) Orphinus sikkimensis Hava & Herrmann
We thank James Hogan (OUMNH) for the loan of types and other specimens used in this study, and Jon Cooter (OUMNH) for commenting on a draft of the manuscript. This study was funded by the Institute of Environmental Biology, Faculty of Biological Science, University of Wroctaw, Poland (project no. 1076/S/IBS/2015).
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Marcin Kadej (1) * and Jiri Hava (2)
(1) Department of Invertebrate Biology, Evolution and Conservation, Institute of Environmental Biology, Faculty of Biological Science, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland
(2) Department of Forest Protection and Game Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamycka 1176, CZ-165 21, Prague 6--Suchdol, Czech Republic.
* Corresponding author; E-mail: firstname.lastname@example.org
(1) Himalayan, defined as a region comprising following territories: Nepal, Tibet, Sikkim, Bhutan, Uttar Pradesh, Assam, Arunachal Pradesh.
Caption: Figs. 1-7. Orphinus (s. str.) pakistanus sp. nov., holotype. 1, Habitus, dorsal; 2, habitus, ventral; 3, abdominal ventrites I-V; 4, head and pronotum, front; 5, pygidium; 6, left antenna, fronto-lateral; 7, left antenna, lateral.
Caption: Figs. 8-11. Orphinus (s. str.) pakistanus sp. nov., holotype. 8, Abdominal sternite X; 9, abdominal segment IX; 10, male genitalia, dorsal; 11, male genitalia, ventral.
Table 1. Checklist of Himalayan species of Orphinus Motschulsky, 1858. Nepal N. India (a) Pakistan Subgenus: Falsoorphinus Pic Orphinus yeti Hava, 2008 * * Subgenus: Orphinus (s. str.) Orphinus hartmanni Hava, 2001 * * Orphinus jucundus Arrow, 1915 * Orphinus kresli Hava, 2003 * Orphinus nilgirensis Arrow, 1915 * Orphinus pakistanus sp. nov. * Orphinus sikkimensis Hava & * Herrmann, 2004 Orphinus unifasciatus Hava, 2006 * Bhutan Subgenus: Falsoorphinus Pic Orphinus yeti Hava, 2008 Subgenus: Orphinus (s. str.) Orphinus hartmanni Hava, 2001 * Orphinus jucundus Arrow, 1915 Orphinus kresli Hava, 2003 Orphinus nilgirensis Arrow, 1915 Orphinus pakistanus sp. nov. Orphinus sikkimensis Hava & Herrmann, 2004 Orphinus unifasciatus Hava, 2006 (a) Defined as a region comprising the provinces: Sikkim, Assam, Uttar Pradesh, Himachal Pradesh, Kashmir.
Please note: Some tables or figures were omitted from this article.
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|Author:||Kadej, Marcin; Hava, Jiri|
|Date:||Sep 1, 2015|
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