Triomicrus anfractus Shen and Yin

Shen, Jia-Wei, Yin, Zi-Wei & Li, Li-Zhen, 2015, Triomicrus Sharp of Eastern China (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4007 (4), pp. 509-528 : 512-515

publication ID

https://doi.org/ 10.11646/zootaxa.4007.4.3

publication LSID

lsid:zoobank.org:pub:680E5EBB-05B4-457F-A27A-B2A52FBB28BD

DOI

https://doi.org/10.5281/zenodo.6098042

persistent identifier

https://treatment.plazi.org/id/BF1B8789-FF8D-FFAB-93E5-F9BDBF69FEB1

treatment provided by

Plazi

scientific name

Triomicrus anfractus Shen and Yin
status

sp. nov.

Triomicrus anfractus Shen and Yin View in CoL , new species

( Figs 3–4 View FIGURE 3 View FIGURE 4 )

Type material (12 ♂♂, 6 ♀♀). Holotype: China: ♂, labeled ‘ China: Zhejiang, Anji County, Longwang Shan N. R. (龙王山), Dongguan-Qianmutian (千亩田), 30°24’17’’N, 119°26’37’’E, mixed leaf litter, sifted, alt. 1050–1250 m, 08.vi.2012, Jia-Yao Hu & Zi-Wei Yin leg.’ ( SNUC). GoogleMaps Paratypes: China: 1 ♂, 1 ♀, same data as holotype ( SNUC); 3 ♂♂, labeled ‘ China: Zhejiang Prov, Longwang Shan N. R., Parking lot, alt. 1300 m, 27.v.2009, Yuan leg.’ ( SNUC); 2 ♀♀, labeled ‘ China: Zhejiang Prov, Longwang Shan N. R., Dongguan (东关), alt. 1300 m, 26.v.2009, Feng, Yuan & Yin leg.’ ( SNUC); 2 ♂♂, labeled ‘ China: Zhejiang Prov, Qingliangfeng N. R. (清凉峰), Guanlizhan-Baibuling (百步岭), alt. 1000 m, 15.vii.2009, Feng & Yuan leg.’ ( SNUC); 1 ♀, also from Qingliangfeng, ‘Qingsongling (青松岭), alt. 1300 m, 16.vii.2009, Feng, Yuan & Yin leg.’ ( SNUC); 5 ♂♂, 2 ♀♀, labeled ‘ China: Anhui, Yuexi County, Yaoluoping Shan N. R. (鹞落坪), Jingangling (±NJΚ), 30°00’18’’N, 116°07’14’’E, beech forest, mixed leaf litter, humus, sifted, 1273 m, 18.vi.2013, Dai & Peng leg.’ ( SNUC). GoogleMaps

Diagnosis. Antennomere XI with disc-like protuberance, slightly prominent. Head lacking median vertexal carina. Pronotum relatively smooth. Elytral subhumeral sulci absent. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Apical lamina of abdominal sternite VII stout, widest near middle, apical margin obliquely narrowed. Aedeagus with right paramere curved mesally, internal sac bearing several sclerotized spines, lacking hairy sclerite.

Description. Male ( Fig. 3 View FIGURE 3 A). Length 1.95–2.08 mm. Head longer than wide, HL 0.44–0.46 mm, HW 0.43– 0.45 mm, lacking median vertexal carina; lateral portions of frons sparsely punctate; each eye composed of about 32 facets. Antennomere XI ( Fig. 3 View FIGURE 3 B–C) with disc-like protuberance, slightly prominent, diameter of protuberance about one-ninth of segmental length. Pronotum wider than long, PL 0.40–0.41 mm, PW 0.50–0.53 mm, relatively smooth. Profemora simple, protrochanters and protibiae lacking spur or spine, mesotibiae lacking denticle. Elytra wider than long, EL 0.68–0.73 mm, EW 0.76–0.82 mm, smooth; subhumeral sulci absent; mesotibiae lacking denticle. Abdomen wider than long, AL 0.44–0.48 mm, AW 0.75–0.78 mm; abdominal tergite IV (first visible tergite) with discal carinae extending to three-fifths of tergal length; abdominal sternite VII modified ( Fig. 3 View FIGURE 3 D), with apical lamina stout, widest near middle, apical margin obliquely narrowed. Length of aedeagus ( Fig. 3 View FIGURE 3 E) including parameres 0.31 mm, with right paramere curved mesally, internal sac bearing many sclerotized spines, lacking hairy sclerite.

Female. Similar to male; antennomere XI unmodified. Each eye composed of about 20 facets. Measurements: BL 1.80–1.91 mm, HL 0.40–0.43 mm, HW 0.39–0.40 mm, PL 0.38–0.40 mm, PW 0.48–0.50 mm, EL 0.65–0.67 mm, EW 0.75–0.80 mm, AL 0.38–0.41 mm, AW 0.73–0.75 mm.

Distribution. Eastern China: Zhejiang and Anhui.

Etymology. The specific epithet ‘ anfractus ’ means ‘curved, bent’, referring to the shape of the apical lamina of sternite VII.

Remarks. Populations from the Longwang Shan, Qingliangfeng and Yaoluoping exhibit only slight geographic variation. Right paramere of aedeagus of the population from Longwang Shan ( Fig. 3 View FIGURE 3 E) is more straight than the other two populations ( Fig. 4 View FIGURE 4 C–D). Form of the sternite VII ( Figs 3 View FIGURE 3 D, 4A–B) found in all populations are almost the same.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Triomicrus

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