Intestinarius longiceps

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Taxonavigation

Ordo: Coleoptera
Familia: Staphylinidae
Genus: Intestinarius

Name

Intestinarius longiceps Yin and Li sp. n. – Wikispecies link – ZooBank link – Pensoft Profile

Type locality

Kuankuoshui Nature Reserve, Guizhou Province, Southwest China

Type material

(2 ♂♂, 10 ♀♀). Holotype: ♂, labelled ‘CHINA: Guizhou Prov. / Kuankuoshui N. R. / Baishaogou / 04.vi.2010 / alt. 700 m / YIN & ZHAI leg.’; Paratypes: 1 ♂, 8 ♀♀, same label data as holotype; 1 ♀, same, but ‘750–900 m / 05.vi.2010 / YIN & ZHAI leg.’; 1 ♀, same, but ‘03.vi.2010 / alt. 700 m’.

Description

Measurements: male (female). BL 2.54–2.63 (2.49–2.57), HL 0.59–0.60 (0.59–0.62), HW 0.51–0.52 (0.51–0.52), PL 0.56–0.57 (0.55–0.56), PW 0.55–0.57 (0.55–0.56), EL 0.74–0.75 (0.73–0.75), EW 0.90–0.91 (0.85–0.88), AL 0.63–0.69 (0.61–0.64), AW 0.76–0.80 (0.78–0.80). Length of aedeagus 0.50. Width of female genitalia 0.27.
General morphology similar to Intestinarius guangdongensis sp. n., but it differs in the followings: Male maxillary palpomere IV not modified; postocular margins remarkably long; antennae (Fig. 8) more robust; mesotibiae (Fig. 11) constricted in apical portion, apical tooth slightly shorter than first tarsomere; metatrochanter (Fig. 14) on posterior margin with broad protuberance, not setose; tergite VII as in Figs 31–32; tergite VIII as in Fig. 33; sternite VIII as in Fig. 34; sternite IX as in Fig. 35; aedeagus as in Figs 36–38; female tergite VIII as in Fig. 43; sternite VIII as in Fig. 44; genitalia as in Figs 49–50.

Distribution

Known only from the type locality.

Etymology

The new species is named after its long postocular margins.

Remarks

The new species may be distinguished from all its congeners by the combination of the male secondary sexual characters, viz. the mesotibiae and metatrochanter, the tergites VII–VIII and the sternites VIII–IX, and the shapes of male and female genitalia.

Key to Chinese species of the genus Intestinarius Kurbatov All the Chinese species are externally very similar, thus, a faithful identification must be based on the dissection of the male and female genital organs combined with certain male secondary sexual characters included in the following key.

Key to Chinese species of the genus Intestinarius Kurbatov — Z. Yin , L. Li , M. Zhao

1		Male: fourth maxillary palpomere with tuft of dense and short setae on exterior margin; mesotibiae lacking apical protuberance (Fig. 9); aedeagus robust, shape as in Figs 20–22. Female: sternite VIII as in fig. 40, female genitalia membranous in most parts, shape as in Figs 45–46. (Guangdong)    Intestinarius guangdongensis sp. n.
–		Male: maxillary palpi unmodified, mesotibiae with apical protuberance; aedeagus elongate, not fitting above. Female: sternite VIII not as in Fig. 40, female genitalia weekly sclerotized in most parts, structure not as above    2
2		Postocular margins not straight, shorter than anterior half of head (Fig. 4). Male: apical protuberance of mesotibiae much longer than first tarsomere (Fig. 10), metatrochanters on posterior margin with apically narrowed and abruptly curved thick spine, setose (Fig. 13), aedeagus as in Figs 28–30 (also see Kurbatov 2007: 284, fig. 12). Female: tergite VIII with median prominence (Fig. 41) and tergite VIII with median emargination (Fig. 42) on each posterior margin; female genitalia as in Figs 47–48. (Yunnan)    Intestinarius kuzmini Kurbatov
–		Postocular margins straight, about as long as anterior half of head (Fig. 5). Male: apical protuberance of mesotibiae slightly shorter than first tasomere (Fig. 11), metatrochanters on posterior margin with apically broad protuberance, lacking setae (Fig. 14), aedeagus as in Figs 36–38. Female: tergite VIII with posterior margin almost flat (Fig. 43), sternite VIII not emarginated medially (Fig. 43), female genitalia as in Figs 49–50. (Guizhou)    Intestinarius longiceps sp. n.

Original Description

• Yin, Z; Li, L; Zhao, M; 2011: On the Chinese species of the genus Intestinarius Kurbatov (Coleoptera, Staphylinidae, Pselaphinae) ZooKeys, 116: 15-24. doi

Images

Figures 1–2. Male habitus of Intestinarius spp. 1 Intestinarius guangdongensis 2 Intestinarius longiceps. Scales: 1.0 mm.  Figures 3–5. Head and pronotum of Intestinarius spp., male. 3 Intestinarius guangdongensis 4 Intestinarius kuzmini 5 Intestinarius longiceps. Scales: 0.3 mm.  Figures 6–14. Details of Intestinarius spp., male. 6–8 antenna 9–11 mesotibia 12–14 metatrochanter 6, 9, 12 Intestinarius guangdongensis 7, 10, 13 Intestinarius kuzmini 8, 11, 14 Intestinarius longiceps. Scales: a–c = 0.3 mm, d–f = 0.2 mm, g–i = 0.1 mm.  Figures 15–22. Details of Intestinarius guangdongensis, male. 15 tergite VII 16 same, anterior view 17 tergite VIII 18 sternite VIII 19 sternite IX 20 aedeagus, lateral view 21–22 same, dorsal view. Scales: 0.2 mm (scale with ‘*’ = 0.1 mm).  Figures 23–30. Details of Intestinarius kuzmini, male. 23 tergite VII 24 same, anterior view 25 tergite VIII 26 sternite VIII 27 sternite IX 28 aedeagus, lateral view 29–30 same, dorsal view. Scales: 0.2 mm (scale with ‘*’ = 0.1 mm).  Figures 31–38. Details of Intestinarius longiceps, male. 31 tergite VII 32 same, anterior view 33 tergite VIII 34 sternite VIII 35 sternite IX 36 aedeagus, lateral view 37–38 same, dorsal view. Scales: 0.2 mm (scale with ‘*’ = 0.1 mm).  Figures 39–50. Details of Intestinarius spp., female. 39, 41, 43 tergite VIII 40, 42, 44 sternite VIII 45, 47, 49 female genitalia, posterior view 46, 48, 50 same, dorsal view 39, 40, 45, 46 Intestinarius guangdongensis 41, 42, 47, 48 Intestinarius kuzmini 43, 44, 49, 50 Intestinarius longiceps.