Globicornis (Pseudomesalia) emeii Háva & Kadej, sp. nov. is described from China. The habitus, antenna and genitalia are illustrated and compared with those of related species.
Genus Globicornis Latreille in Cuvier, 1829 is one of the 62 genera established in the skin beetle family (Dermestidae) so far. It has been divided into five subgenera so far: Dearthrus LeConte, 1861; Elania Mulsant and Rey, 1868; Globicornis Latreille in Cuvier, 1829; Hadrotoma Erichson, 1848; and Pseudomesalia Ganglbauer in Bodemeyer, 1900 (Kadej & Jaroszewicz 2013, Háva 2007, 2014). Morphological characteristics of adults that distinguish Globicornis from related genera were given by Peacock (1993) and Herrmann et al. (2011). The same has been provided by Beal (1967), Peacock (1993) and Kadej & Jaroszewicz (2013) for larval stages. In this paper, a new species of Globicornis from China is described.
Materials and Methods
Morphological structures were boiled for 3–10 minutes in 10% KOH, and placed in distilled water for about 1 hour to clean and soften the cuticle. For taking the photos all structures were placed on drop of glycerin and then deposited in micro vials filled with glycerin. Morphological structures were examined with a Nikon Eclipse E 600® (Tokyo, Japan) phase contrast microscope, and a Nikon SMZ—800® (Tokyo, Japan) binocular microscope. Photographs were taken with a Canon 500D® (Taiwan) and a Nikon D5100® (Tokyo Japan) camera under a Nikon Eclipse 80i® (Tokyo, Japan) and/or a Nikon SMZ—800® (Tokyo, Japan). Image stacks were processed using Combine ZM® (Hadley 2010).
The following abbreviations were used in this study:
Naturhistorisches Museum, Basel, Switzerland.
Private Entomological Laboratory & Collection, Jiří Háva, Prague-west, Czech Republic.
The types are labelled in red, with a printed label bearing the text as follows: “HOLOTYPE [ALLOTYPE/PARATYPE respectively] Globicornis (Pseudomesalia) emeii sp. n. J. Háva & M. Kadej det. 2014”.
Subfamily Megatominae Leach, 1815
Tribe Megatomini Leach, 1815
Genus Globicornis Latreille in Cuvier, 1829
Globicornis (Pseudomesalia) emeii sp. nov. (Figs 1–10)
Holotype (male): China, Sichuan pr., Emei Mt., 500 m, 4–20.v.1989 Vít Kubáň leg., (HNMB) [both antenna broken, both antennal clubs incomplete and together with three legs glued on the label; tarsi broken]. Allotype: ( female): the same data as holotype, (HNMB) [tarsi broken, antennal club of right antenna glued on the label-the rest of the antenna lost]; Paratypes: (1 male [both antenna broken, antennal clubs incomplete and together with three legs glued on the label; tarsi broken], 3 females [tarsi broken, antennal club lost]): China, Sichuan, Emei Mt., 600–1050 m, 5.19.v.1989, Lad. Bocák lgt., (2 females HNMB, male and female JHAC).
Body convex and elongated (nearly 2.5 times as long as wide); measurements: body length from anterior margin of pronotum to apex of elytron 2.25–2.85 mm, median pronotal length 0.5–0.6 mm, maximum width of pronotum 1.15 mm, maximum width of elytron 1.25 mm, median length of visible abdominal sternites I-V 1.25 mm, maximum width of visible abdominal sternites I-V 11.25 mm. Dorsal and ventral pubescent recumbent, entirely light golden brown (in transparent light seems to be grayish, Figs. 1–3). Head visible from above; integument of head is dark-brown (almost black); densely punctured (Figs. 1 and 2). Eyes are tan/ light-brown, large, and convex without internal emargination. Ratio of length of antennal fossa to length of lateral margin of pronotum (hypomeron) is 0.5:1.0. Median ocellus is present. Antenna has 9 antennomeres (Fig. 5). Antennal club with three antennomeres; shorter than the flagellum (Fig. 5). Terminal antennomere in male elongated and subtriangular (Fig. 4), while in female flattened (Fig. 5). Antennomeres I-VI brown, while antennomeres VII-IX brownish-black (Fig. 5); all antennomeres are covered with erect brown hairs. Pronotum dark-brown (almost black) with punctation deeper than those on head. Pronotal dorsal rim of antennal fossa of male slightly visible from above, while in female is less visible. Scutellum triangular and small. Elytra brown, only anterior parts (above humeri calli) and margins along suture are dark-brown; entire area is sparsely punctured and covered by tan light brown pubescence (Figs. 1 and 2). Sternites I-V with surfaces of integument dark-brown, sparsely punctured, and covered by light brown (tan) pubescence (Fig. 3). Visible sternite I without two oblique striae on each side extending from anterior margin of ventrite. Legs brown; trochanters, coxae, and femora are dark-brown; tibiae and tarsi are brighter than other parts. Dorsal surface is covered with light golden brown pubescence. Tibiae without tibial teeth on dorsal margin. Tarsus has two slightly curved claws. Male genitalia symmetrical (Fig. 6). Ratio of length to width like 1.5:1.0. Penis (median lobe) reaching apices of parameres, distinctly extending beyond bridge, apex of penis in lateral view appears hook-like, acute, and strongly curved (Fig. 7); bridge of parameres slightly arcuate to phallobase, poorly sclerotized; parameres has few scattered, short, erect setae on inner subapical parts; apex of parameres is slightly curved inward (Fig. 6). Abdominal sternite IX appears like a trapeze with distinct extension at half of total length; few prominent setae are located on apical margin and on lateral margins to half/ two-third their length, a few setae are also present on central part of flat area below apex (Fig. 8). Abdominal sternites VII and VIII as in Figs. 9 and 10.
The new species belongs to the subgenus Pseudomesalia because of presence of 9-segmented antennae and bicolorous dorsal surfaces. It differs from the other known species of Pseudomesalia by the characteristics given in Table 1 below.
The new species closely resembles unicolorous species G. (G.) nigripes, but differs from it by the number of antennomeres: in G. (P.) emeii sp. nov. antenna with 9 antennomeres, whilst in G. (G.) nigripes with 10 antennomeres.
Named after the Emei Mt. (Sichuan Province), the place where the species was discovered.
China: Sichuan Province.
Comparison between some of Globicornis species.
The new species has been classified in subgenus Pseudomesalia which is placed between such subgenera as: Globicornis s. str. (18 species), Hadrotoma (seven species), Elania (two species) and Socotracornis (with one species). In spite of the fact that most Globicornis species have a primarily Palaearctic distribution, so far no Globicornis species has been recorded from China, thus the newly described G. emeii is the first. It is more than likely that in the near future (parallel with the intensification of taxonomical studies) another new species will be found and described.
We are grateful to Michel Brancucci (NHMB) for loaning the interesting material. Sincere thanks to anonymous reviewers for a critical reading of this paper. This research was supported by the Internal Grant Agency (IGA n.20124364), Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague and Department of Invertebrate Biology, Evolution and Conservation, Institute of Environmental Biology, Faculty of Biological Science, University of Wrocław (project no. 1076/S/IBŚ/2014).