Mannerheimia pleshanovi Shavrin, 2021

Shavrin, Alexey V., 2021, On the genus Mannerheimia Mäklin, 1880 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini), with taxonomic and faunistic notes on some species, Zootaxa 5040 (3), pp. 301-333 : 325-328

Mannerheimia pleshanovi Shavrin , sp.n.

( Figs. 7 , 25 , 65–69 )

Mannerheimia arctica: Shavrin et al. 1999: 28

Mannerheimia divergens: Shavrin et al. 1999: 28

Type material examined: Holotype ♂: ‘Хамар-Дабан, ИркутскаЯ обл[асть]. | ур[очиЩе]. [реки] Подкомарной, окр[естности]. метеост[анции]. | “Хамар-Дабан” | 10- 14.06.1996. 1600 m a.s.l. | Шаврин А.В. leg [Khamar- Daban, Irkutsk Area, tract of Pokomarnaya River, environs of meteorological station “Khamar-Daban … Shavrin A.V…”].’ <printed>, ‘ HOLOTYPE | Mannerheimia | pleshanovi sp.n. | Shavrin A.V. des. 2021’ <red, printed> ( ZMM).

Paratypes: RUSSIA: IRKUTSK AREA: 1 ♂ [dissected], 3 ♀♀: same data as the holotype (1 ♀: ZMM; 1 ♀: BMNH; 1 ♂, 1 ♀: cSh); 1 ♂ [dissected; left antennomeres 3-11 missing]: ‘Хамар-Дабан | Комаринский | хр. h=1900 | 14.VI.96. | Шаврин А. [Khamar-Daban, Komarinskiy Mt….Shavrin A.]’ <printed>, ‘ Mannerheimia [handwritten] | divergens Mäkl. [handwritten] |V.I. Gusarov det. 1997’ <printed> (cSh); 1 ♂: ‘E Siberia, Khamar- Daban | Mts., Komarinskiy Mt., | upper flow of Slyudyanka R. | 15- 16.07.2013, A.V. Shavrin | & I.V. Enushchenko’ (cSh); 1 ♀: ‘Хамар-Дабан | ср[еднее]. т[ечение реки]. Бабхи | 10-12.05.[19]99 | Шаврин А. [Khamar-Daban, middle flow of Babkha River… A.V. Shavrin leg.]’ (cSh); 1 ♂, 1 ♀: ‘E Siberia | Khamar-Daban Mts. | upper of Babkha R. 27.06.06. | Babkha mountain h= 1600 m | Shavrin A.V.’ (cSh); 1 ♀: ‘ИркутcкаЯ область, СлюдЯнский р-н, хр[ебет]. | Хамар-Дабан, пр[авый]. бер[ег]. р. Утулик выше по | теч[ению]. от п[осёлка]. Утулик, N 51°31’12.1’’ E | 104°02’34.8’’, h= 497 m. 09.08.2016. A.B. | Шаврин, А.В. ЕнуЩенко [Irkutsk Area, Slyudyanskiy District, Khamar-Daban Mts., right side of Utulik River, upstream of Utulik … A.V. Shavrin, A.V. Enushchenko]’ (cSh); 1 ♂ [dissected]: ‘East Siberia | Khamar-Daban Mts. | valley of Kharlakhta R. | 17- 18.06.2000 | Shavrin A. leg.’ (cSh); 2 ♂♂ [dissected; left antenna and right antennomeres 3-11 missing], 1 ♀ [elytra, prontoum and head missing]: ‘Mts. Khamar-Daban | Solzan River | 20.09.1978 | V. Shilenkov leg.’ (cSh); 2 ♀♀: ‘East Siberia | Khamar-Daban Mts. | valley of Snezhnaya R. | 5- 8.6.2007 | Shavrin A. leg.’ (cSh); BURYATIA: 2 ♂♂ [one specimen dissected]: ‘Хамар-Дабан | дол[ина]. р[еки]. Б[ольшаЯ]. Осиновка | пихтовый лес. 21.08.1981 | И. Вейнберг [Khamar-Daban, valley of Bolshaya Osinovka River, fir-forest… I. Veinberg leg.]’ <printed> (1 ♂: ZIN, 1 ♂♂: cSh); 1 ♂: ‘Хамар-Дабан, 2000 м | верх[овьЯ]. р[еки]. Осиновки | 25-31.07.95 | Шаврин А. [Khamar-Daban, 2000 m, upper flow of Osinovka River… A.V. Shavrin leg.]’ <printed>, ‘тундра | на гр[анице]. снега [tundra at the border of snow]’ <printed> (cSh). All paratypes with red label: ‘ PARATYPE | Mannerheimia | pleshanovi sp.n. | Shavrin A.V. des. 2021’.

Description. Measurements (n=20): HW: 0.47–0.54; HL: 0.30–0.37; OL: 0.10–0.12; AL (averaged): 0.77–0.91; PL: 0.37–0.44; PW: 0.72–0.82; EL: 0.53–0.74; EW: 1.00–1.14; AW: 1.05–1.22; MTbL (holotype): 0.47; MTrL (holotype): 0.27 (MTrL 1–4: 0.17; MTrL 5: 0.10); AedL: 0.40–0.52; TL: 1.90–2.85 (holotype: 2.30).

Body wide, moderately small and convex ( Fig. 7 ). Coloration yellow-brown to reddish brown, with darker head and abdomen; mouthparts, antennae and legs yellow (sometimes antennomeres 5–11 or 8–11 darker). Body without microreticulation except for latero-apical portion of head in some specimens with fine diagonal meshes, sometimes neck and scutellum with very fine transverse microsculpture and abdomen with isodiametric microreticulation. Head with irregular and sparse punctation, larger and deeper in middle; punctation of pronotum about as that on head, but somewhat denser, larger and deeper (punctation of some specimens with sparser and finer middle and with impunctate area in mediobasal third); scutellum with several fine punctures or without them; punctation of elytra slightly sparser than that on pronotum, but larger and deeper, coarser in prescutellar portion and finer in middle along suture, each elytron with or without indistinct five to six tangled longitudinal rows of punctures; abdominal tergites with or without very fine and sparse punctation.

Head 1.4–1.5 times as broad as long, with distinctly elevated median portion, with or without very short and deep anteocellar foveae. Ocelli small and sometimes indistinct, distance between ocelli about as distance between ocellus and posterior margin of eye. Apical segment of maxillary palpi from twice to about three times as long as preceding segment, wider in about middle than previous segment, gradually narrowed toward subacute apex. Antenna with distinctly transverse antennomeres 5–10, progressively widened apically; antennomere 3 about as long as antennomere 2, 4 about as broad as long, 5–6 slightly broader and longer than 4, 7 broader than 6, 8 broader than 7, 9 broader and longer than 8, 10 broader than 9, apical antennomere about twice as long as preapical antennomere.

Pronotum strongly transverse, 1.8–1.9 times as broad as long, 1.5 times as broad as head, widest in about middle, markedly more narrowed posteriad than anteriad, sometimes with distinctly sinuate laterobasal margins in front of obtuse angles; apical margin widely rounded or somewhat straight; anterior angles widely rounded, slightly protruded anteriad.

Elytra short, 1.5–1.8 times as broad as long, significantly widened apicad, with lateral portions disitnctly explanate; some specimens with diagonal longitudinal elevations between rows of punctures; apical margins straight of rounded. Hind wings reduced.

Metatarsus 1.7 times as long as metatibia.

Abdomen slightly broader than elytra, without tomentose wing-folding patches in middle of abdomianl tergite V and palisade fringe on apical margin of abdominal tergite VII.

Male. Apical margin of abdominal tergite VIII slightly and sternite VIII deeply concave. Aedeagus with wide basal portion, gradually narrowed apically toward rounded apex; parameres slightly widened in apical portions, distinctly exceeding apex of median lobe ( Figs. 66, 68 ). Lateral aspect of aedeagus as in Fig. 67 .

Female. Apical margins of abdominal tergite VIII and sternite VIII rounded.

Comparative notes. Based on the general shape of the body and the aedeagus, M. pleshanovi sp.n. is closely related to M. arctica (similar shape of the laterobasal parts of the pronotum) and M. brevipennis (similar shapes of preapical antennomeres). From both species it can be distinguished by shorter and wider elytra, reduced hind wings and wing-folding patches in the middle of abdominal tergite V, and the different shape of the apical part of the median lobe.

Distribution. The species is known from several localities in the northern slopes of Khamar-Daban Mts. in Cisbaikalia (Irkutsk Area, Buryatia), East Siberia ( Fig. 65 ).

Bionomics. The species was collected in mixed forests with Larix , Pinus , Betula and flood plain deciduous forest with Salix and Populus . It was most often found in wet litter and mosses along streams ( Fig. 69 ). The elevations range from 400 m a.s.l. to 2000 m a.s.l. The specimens were collected during the period from May to September.

Etymology. Patronymic, the species is named in memory of the Siberian entomologist and phytopathologist Andrey S. Pleshanov (1941–2011).

Figures

FIGURE 69. Type locality of the paratype of Mannerheimia pleshanovi in upper reaches of Babkha River, Khamar-Daban Mts., Russia.

FIGURES 1–9. Habitus of Mannerheimia: 1—M. afghanica (paratype), 2—M. arctica, 3—M. asiatica, 4—M. brevipennis, 5—M. japonica, 6—M. obscura, 7—M. pleshanovi (paratype), 8—M. yasudai, 9—M. zanettii (paratype). Scale bar: 1.0 mm.

FIGURES 16–25. Antenna (Figs. 16–19) and pronotum (Figs. 20–25) of Mannerheimia arctica (Figs. 16–17, 20–22), M. brevipennis (Figs. 18–19, 23–24) and M. pleshanovi (Fig. 25): 16, 18—right antenna of male, 17, 19—right antenna of female, 20—Irkutsk Area: Vitimskiy Nature Reserve, 21—Krasnoyarsk Territory: Potapovo, 22—Murmansk Area: Khibiny, 23—Krasnoyarsk Territory: Lebyazhya River, 24—China (Xinjiang), 25—Irkutsk Area: Khamar-Daban (paratype). Scale bar: 0.1 mm.

FIGURES 63–65. Distribution of Mannerheimia obscura in Pakistan and India (Fig. 63), M. yasudai in Russia and Japan (Fig. 64) and M. pleshanovi in Khamar-Daban Mts., Russia (Fig. 65).

FIGURES 66–68. Aedeagus of Mannerheimia pleshanovi (paratypes): 66, 68—parameral view, 67—lateral view. Scale bar: 0.1 mm.