Mannerheimia grandilobata Shavrin, 2018

Shavrin, Alexey V., 2018, Four new species of the genus Mannerheimia Mäklin, 1880 (Coleoptera: Staphylinidae: Omaliinae) from south-western China and Taiwan, Zootaxa 4407 (4), pp. 521-532 : 522-525

publication ID	https://doi.org/ 10.11646/zootaxa.4407.4.4
publication LSID	lsid:zoobank.org:pub:D112CD45-7907-4F42-9D32-0DC7DC3A39EB
DOI	https://doi.org/10.5281/zenodo.5949828
persistent identifier	https://treatment.plazi.org/id/FD5D6D7E-FFD2-FF94-9D80-6050FAE08693
treatment provided by	Plazi
scientific name	Mannerheimia grandilobata Shavrin
status	sp. nov.

Treatment

Mannerheimia grandilobata Shavrin View in CoL , sp.n.

( Figs. 1 View FIGURES 1–4 , 5–6 View FIGURES 5–8 , 9 View FIGURES 9–10 , 11 View FIGURE 11 )

Paratypes (138 specimens): 32 ♂ [two specimens dissected], 24 ♀: same data as the holotype (4 ♂, 4 ♀: CS; 14 ♂, 10 ♀: CNC; 14 ♂, 10 ♀: NSMT); 12 ♂, 22 ♀: ‘CHINA, Yunnan, 15km | W Deqin, Mingyong, | N28°27'29'' E98°45'28'', | 7.vi.2012, 3289m, | sift16, V. Grebennikov’ <rectangular label, printed> (4 ♂, 6 ♀: CS; 8 ♂, 16 ♀: CNC); 1 ♀: ‘CHINA, Yunnan, 15km | W Deqin, Mingyong, | N28°27'39'' E98°46'19'', | 8.vi.2012, 2735m, | sift17, V. Grebennikov’ <rectangular label, printed> (CS); 10 ♂ [one specimen dissected], 5 ♀: ‘CHINA: N-Yunnan [C 2005-09] | Diqing Tibet. Aut. Pref., | Deqin Co., Meili Xue Shan, | E-side, 14 km W Deqin, 2580 m,’ <rectangular label, printed>, ‘28°27.47'N, 98°46.35'E, creek | valley below glacier, mixed forest, | leaf litter, moss, dead wood, sifted, | 11.VI.2005, M. Schülke [C 2005-09]’ <rectangular label, printed> (MNB); 7 ♂ [two specimens dissected], 2 ♀ [one specimen dissected]: ‘CHINA: N-Yunnan Diqing Tibet. | Aut.Pr. Deqin Co. Meili Xue | Shan E-side 14 km W Deqin | 28°27.47'N 98°46.35'E 2580m | 11.VI.2005 A.Smetana [C158]’ <rectangular label, printed> (NSMT); 1 ♂: ‘CHINA: N-Yunnan Nujiang Lisu | Aut.Pr.Gongshan Co. Gaoligong | Shan, valley at 3000- 3050 m | 27°47.90'N 98°30.19'E | 21.VI.2005 A.Smetana [C169]’ <rectangular label, printed> (NSMT); 2 ♂ [one specimen dissected], 5 ♀: ‘CHINA: Yunnan [CH07-24], Nujiang | Lisu Aut. Pref., Gaoligong Shan, valley 18 | km W Gongshan, 3020 m, 27°47'54''N, | 98°30'13''E, mixed forest, litter, moss, | wood sifted, 7.VI.2007, M. Schülke’ <rectangular label, printed> (MNB); 1 ♂, 2 ♀: ‘CHINA: N-Yunnan [C 2005-16] | Nujiang Lisu Aut. Pref., Gongshan Co., | Gaoligong Shan, sidevalley, | 3000-3050 m, 27°47.90'N, 98°30.19'E’ <rectangular label, printed>, ‘conif[erous]. forest with Rhododendron , broad | leaved bushes, litter, moss, dead wood | sifted along creek and snowfields, | 21.VI.2005, M. Schülke [C 2005-16]’ <rectangular label, printed> (MNB); 1 ♂: ‘CHINA (Yunnan) | Nujiang Lisu Aut. Pref. | Gaoligong Shan, valley 18 km | W Gongshan, 3020 m | 27°47'54''N, 98°30'13''E | (mixed forest, litter, moss, | wood sifted) | 7.VI.2007 D.W.Wrase [24]’ (MNB); 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan, | N27°47'22.1'' E098°32' | 17.7'', 24.v.2010, 3027m | sifting20, V.Grebennikov’ <rectangular label, printed> (NSMT); 2 ♂ [one specimen dissected], 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan, | N27°59'01.0'' E098°32'56.9'' 27.v. 2010. 3018m | sifting 22. V. Grebennikov’ <rectangular label, printed> (NSMT); 1 ♂, 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan, | N27°46.8' E098°33.1', 12 | - 15.vi.2009, 200- 3000m, | sifting 1-7, V.Grebennikov’ <rectangular label, printed> (NSMT); 1 ♂, 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan, | N27°59'11.5'' E098°33' | 25.3'', 28.v.2010, 3086m, | sifting 24. V. Grebennikov’ <rectangular label, printed> (NSMT); 2 ♂, 1 ♀: ‘P.R. CHINA, Yunnan, E | slope N Gaoligongshan, | N27°59'01.0'' E098°32' | 56.9'', 27.v.2010, 3018m | sifting 23. V. Grebennikov’ <rectangular label, printed> (CS). All paratypes with additional red rectangular printed label: ‘PARATYPE | Mannerheimia | grandilobata sp.n. | Shavrin A.V. des. 2017’.

Description. Measurements (n=137): HW: 0.52–0.66; HL: 0.31–0.42; AL (holotype): 0.81; OL: 0.13–0.18; PL: 0.44–0.55; PW: 0.77–1.02; EL: 0.77–1.06; EW: 1.15–1.49; AW: 1.11–1.50; MTbL (holotype): 0.56; MTrL (holotype): 0.33 (MTrL 1–4: 0.21; MTrL 5: 0.12); AedL: 0.74–0.78; TL: 2.37–3.17 (holotype: 2.82).

Body more or less wide, convex. Yellow-brown to reddish-brown, some with head brown; mouthparts, antennomeres 1–6 and legs yellow; antennomeres 7–11 yellow-brown. Body shiny, without microsculpture except abdominal tergites with indistinct or distinct isodiametric microsculpture. Head with irregular and sparse, moderately large and deep punctation, sometimes denser on median portion; pronotum with sparse and dense punctation similar to that on median part of head, sometimes deeper on medio-apical portion, with small impunctate medio-basal and latero-basal portions; scutellum without or with several small punctures; punctation of elytra as that on pronotum, each elytron with six longitudinal rows of punctures, confused in basal and apical portions, remaining elytral punctures forming indistinct and sometimes tangled diagonal rows or becoming irregularly scattered laterally; abdominal tergites with very small and sparse punctures, sometimes very indistinct and visible only under high magnification. Body largely glabrous; lateral portions of head, median portion of pronotum and elytra with very sparse, short and erect setae; abdomen with very sparse small setae, distinctly longer on paratergites and apical tergites. Habitus as in Fig. 1 View FIGURES 1–4 .

Head 1.5–1.6 times as wide as long, with slightly elevated median portion, with shallow occipital furrow between ocelli, with distinct very short grooves in front of ocelli; some paratypes with very indistinct small transverse impression between between eyes at posterior third; head abruptly narrowed toward neck behind eyes; anterior portion of head between antennal insertion and anterior margin of eye widely concave. Eyes very large and convex. Ocelli large and slightly convex, apical margin of ocelli situated at level of posterior margins of eyes; distance between ocelli about one and a half times as long as distance between ocellus and posterior margin of eye. Apical segment of maxillary palp more than three times as long as preceding segment, gradually narrowing toward apex. Antenna reaching basal portion of elytra when reclined, with antennomere 4 slightly longer than wide; length × width of antennomeres (holotype): 1: 0.10 × 0.06; 2: 0.07 × 0.05; 3: 0.08 × 0.03; 4: 0.05 × 0.03; 5: 0.07 × 0.03; 6–7: 0.07 × 0.04; 8–9: 0.06 × 0.06; 10: 0.06 × 0.07; 11: 0.12 × 0.08.

Pronotum 1.7–1.8 times as wide as long, 1.4–1.5 times as wide as head, widest slightly in front of middle, markedly more narrowed posterad than anterad; apical margin slightly narrower than posterior margin; anterior angles more or less widely rounded, distinctly protruded anteriad; posterior angles obtuse; lateral portions with finely bordered margins, very slightly explanate, sometimes with indistinct pit at middle.

Elytra 1.4 times as wide as long, distinctly widened apicad, 1.7–1.9 times as long as pronotum; lateral portions of elytra narrow, distinctly explanate; lateral margins distinctly bordered, latero-apical margins with sparse and very smooth crenulation visible under high magnification. Wings fully developed.

Metatarsus about 1.7 times as long as metatibia.

Abdomen about as wide as elytra, with pair of small oval tomentose wing-folding spots on middle of tergite V; apical margin of abdominal tergite VII with very narrow palisade fringe in some.

Male. Protarsomeres 1–4 slightly widened. Apical margin of abdominal tergite VIII straight or rounded. Apical margin of abdominal sternite VIII widely and moderately deep sinuate. Aedeagus ( Fig. 5 View FIGURES 5–8 ) with median lobe very wide basally, gradually narrowing toward apex, which is widely rounded; parameres slightly exceeding apex of median lobe, with slightly widened moderately short apical portions; internal sac complicated, moderately wide and long, with characteristic diagonally curved apical fields of sclerites consisting of elongated thorns. Aedeagus laterally as in Fig. 6 View FIGURES 5–8 .

Female. Protarsomeres 1–4 not widened.Apical margin of abdominal tergite VIII straight. Apical margin of abdominal sternite VIII rounded.

Comparative notes. Based on the body size, coloration and presence of the shortened elytra, the new species is most similar to M. brevipennis ( Motschulsky, 1860) and M. arctica ( Erichson, 1840) , from which it differs by the more shiny body, significantly larger punctation of the narrower elytra, and by internal and external structure of the aedeagus. Mannerheimia grandilobata sp.n. differs from all species of the genus by the wide median lobe apex of the aedeagus.

Distribution. The new species is known from several locations in Meili Xue Shan and Gaoligong Shan ranges in Yunnan, China ( Fig. 9 View FIGURES 9–10 ).

Bionomics. Specimens were collected at elevations from 2580 to 3289 m a.s.l. and were taken by sifting leaf litter, moss and dead wood in creek valleys with mixed forest near a glacier (locality: C 2005-09), wet leaf litter, debris and moss on and around small seepages and on edges of a small creek in a mixed broadleaved forest (locality: C158), leaf litter, moss and various debris under rhododendrons and various broadleaved shrubs near small creeks and snowfields (locality: C169), litter, moss and wood in mixed forest (locality: CH 07-24), litter, moss and dead wood along creek and snowfields near coniferous forest with Rhododendron and broad leaved bushes (locality: C 2005-16 ( Fig. 11 View FIGURE 11 )).

Etymology. The specific epithet is an adjective composed of the Latin adjectives grandis, - e (large) and lobatus, - a, - um (lobed). It alludes to the wide and extended apical part of the median lobe of the aedeagus.