Anthobium monticola ( Cameron, 1924 )

Shavrin, Alexey V. & Smetana, Aleš, 2018, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). II. fusculum group, and two additional species of the nigrum group, Zootaxa 4508 (4), pp. 451-506 : 485-488

Anthobium monticola ( Cameron, 1924)

( Figs. 7, 9, 11, 13 , 15, 17, 19, 21, 23, 25, 27, 33–37, 75, 81–83)

Lathrimaeum monticola Cameron, 1924: 169

Lathrimaeum monticola: Cameron, 1930: 154

Lathrimaeum monticola: Scheerpeltz, 1933: 1056

Lathrimaeum (Lathrimaeum) monticola: Scheerpeltz, 1961: 78

Anthobium monticola: Herman, 2001: 236

Anthobium (Anthobium) monticola: Smetana, 2004: 239 ; Schülke & Smetana, 2015: 307

Type material examined: Lectotype (here designated) of Lathrimaeum monticola Cameron, 1924 ♂: ‘SYN- | TYPE’ <round label with blue margin, printed>, ‘Type | H. T.’ <round label with red margin, printed>, ‘Chakrata Dist., | Korawa Khud 9100`’ <rectangular label, printed>, ‘Dr. Cameron. | 4. V. 22.’ <rectangular label, printed>, ‘ Lathrimaeum | monticola | Cam.’ <rectangular label, handwritten in black Indian ink>, ‘E. I. 40 ’ <rectangular label, handwritten in black>, ‘M. Cameron | Bequest. | B.M. 1955-147.’ <rectangular printed label>, ‘ LECTOTYPE | Lathrimaeum | monticola | Cameron, 1924 | Shavrin A.V. des. 2016’ <red rectangular label, printed>, ‘ Anthobium | monticola ( Cameron, 1924) | Shavrin A.V. det. 2016’ <rectangular label, printed> (BMNH).

Paralectotypes of Lathrimaeum monticola Cameron, 1924: 1 ♂: ‘SYN- | TYPE’ <round label with blue frame, printed>, ‘United Prov., | N. India. [underlined by yellow] | B.M. 1924-335.’ <rectangular label, printed>, ‘Chakrata Dist. | Korawa Khud 9100`| Dr. Cameron. | 4. V. 22.’ <rectangular label, printed>, ‘ Lathrimaeum | monticola | Cam. | Co-type’ <rectangular label, handwritten in black Indian ink> (BMNH); 3 ♂♂, 1 ♀: ‘SYN- | TYPE’ <round label with blue frame, printed>, ‘Gahan 7000`| Simla Hills’ <rectangular label, printed>, ‘Dr. Cameron. IX.1921.’ <rectangular label, printed>, ‘M. Cameron. | Bequest. | B.M. 1955-147.’ <rectangular label, printed> (BMNH); 1 ♀: ‘SYN- | TYPE’ <round label with blue frame, printed>, ‘Bindal Gadh. | Konain.’ <rectangular label, printed>, ‘Dr. Cameron. | 5. V. 21., M. Cameron. | Bequest. | B.M. 1955-147.’ <rectangular label, printed> (BMNH); 1 ♂ [specimem without left elytron]: ‘Gahan 7000`| Simla Hills’ <rectangular label, printed>, ‘Dr. Cameron. IX.1921.’ <rectangular label, printed>, ‘COTYPE’ <red rectangular label, handwritten>, ‘ Lathrimaeum | monticola | Cam’ <rectangular label, handwritten in black Indian ink>, ‘ Lathrimaeum | monticola | Cameron’ <rectnagular label, printed>, ‘Coll. W. Champman | in Coll. P. Griveau | MHNG - 2007’ <rectangular label, printed>, ‘monticola | Cam’ <rectnagular label in yellow frame, handwritten in black Indian ink> (MHNG); 2 ♂♂, 3 ♀♀: ‘SYN- | TYPE’ <round label with blue frame, printed>, ‘Theog 7600 | Simla Hills.’ <rectangular label, printed>, ‘Dr. Cameron | IX. 1921.’ <rectangular label, printed>, ‘M. Cameron. | Bequest. | B.M. 1955-147.’ <rectangular label, printed> (BMNH).

One paralectotype is deposited in the collection of FMNH; the photograph of habitus and labels are available in Arthropod Collections Database of FMNH: http://emuweb.fieldmuseum.org/arthropod/coleop.php (last Access: 18.06.2018).

Additional material: PAKISTAN: 1 ♀: AZAD JAMMU AND KASHMIR: Pakistan (AJK) Leepa-Top, Muzaffarābad. 3200-3300 m a.s.l. 14.06.1997. [W.] Heinz leg. ( CAP) ; INDIA: HIMACHAL PRADESH: 4 ♂♂: ‘ Parbatti V. Kulu. Punjab. 6-8,000ft. H. G.C. ’, ‘ Lathrimaeum monticola Cam. ’ ( BMNH) ; UTTARANCHAL PRADESH: 1 ♂: ‘ Konain , 7800. Chakrata, U.P. ’, ‘ M. Cameron. Bequest. B.M. 1955-147.’ ( BMNH) ; NEPAL: 1 ♂: SW Dhaulagiri Himal env. Jaljala La , 28°30'N 83°15'E. 3300-3500 m a.s.l. 12-13, 21.05.2012. J. Schmidt leg. ( NME) ; 1 ♀: Mahakali / Darchula, 14 km NNE Ghusa, river before Api , 29°56'06''N 80°56'36''E. 3450 m a.s.l. 10.06.2005. A. Weigel leg. ( CS) ; 1 ♂: Karnali Province, Jumla District, Gothichaur , 29°12.1'N 82°18.1'E. 2850 m a.s.l., forest. 13.06.1997. A. Weigel leg. ( NME) ; 1 ♀: same Province and District, Maharigaon , 29°21.3'N 82°23.46'E. 3750 m a.s.l. NN. 0 6.07.1999. M. Hartmann leg. ( NME) ; 1 ♀: P: Seti /D: Bajhang, 42 km NE Chainpur, Kalapani Khola , 29°48'23''N 81°29'04''E. 3750 m NN (#27). 23.06.2009. D. Mattern leg. ( NME) ; 1 ♂: Lamjung, S-Sundar Danda , 28°22'57''N 84°20'57''E. 3140 m a.s.l. 21.09.2013. [J.] Hagge & [J.] Schmidt leg. ( NME) ; 1 ♂: Manang District, For. W Bagarchhap. 22.09. 1983. 2250 m a.s.l. A. Smetana & I. Löbl ( MHNG) .

Redescription. Measurements (n=20): HW: 0.67–0.80, HL: 0.40–0.55; AL: 1.62; OL: 0.17–0.25; PL: 0.50–0.60; PW: 1.02–1.37; ESL: 1.37–1.75; EW: 1.40–1.85; AW: 1.11–1.41; MTbL(lectotype): 0.90, MTrL(lectotype): 0.40 (MTrL 1–4: 0.25; MTrL 5: 0.15); AedL: 0.60–0.67; TL: 3.10–4.50(lectotype).

Body more or less elongate to moderately wide, subconvex. Body reddish brown, with dark-brown head and abdomen, some specimens with elytra paler, yellow-brown to brown; mouthparts, antennomeres 1–3, lateral and basal margins of pronotum (some specimens) and legs yellow to yellow-brown. Body shiny, without microsculpture on pronotum and elytra; head between supra-antennal elevation and anterior margin of eye with very fine, indistinct or well-developed diagonal cellular-shaped meshes, basolateral portions of head behind eyes and posterior portions of infraorbital ridges with indistinct to distinct coarse microsculpture, some specimens with small elevated wrinkles between punctures; middle part of neck and abdominal tergites with distinct isodiametric microsculpture. Head with irregular and large punctation, denser and deeper on middle portion between eyes and on posterior half of infraorbital ridges; middle part of neck with more or less regular, small and deep punctures; pronotum with irregular punctation as that on middle part of head, distinctly sparser and smaller on mediobasal third between impressions and latero-apical portions; scutellum with several small punctures; punctation of elytra dense, markedly larger, deeper and sometimes coarser than that on pronotum, smaller on parascutellar area and along basal margins, each elytron with five to seven vague and tangled longitudinal rows of punctures, remaining elytral punctures forming indistinct and tangled diagonal rows and becoming irregularly scattered laterally; abdominal tergites with sparse, indistinct small punctures. Habitus as in Fig. 75 .

Head 1.4–1.6 times as wide as long; vertex irregularly elevated, with middle transverse triangular impression between eyes at posterior third, with distinct occipital furrow between ocelli, with elongate grooves in front of ocelli, reaching middle or anterior third of eye; postocular ridges slightly protruded, acute, distance between postocular ridge and posterior margin of eye as long as two nearest facets; anterior portion between antennal insertion and anterior margin of eye with wide semicircular notch. Eyes large and convex. Ocelli very large, equal to diameter of two-three nearest punctures, convex, situated at level of posterior margin of eyes; distance between ocelli usually slightly longer than distance between ocellus and posterior margin of eye. Labrum moderately wide, with widely rounded membranous latero-apical portions, with deep apical emargination and with very long basolateral projections ( Fig. 7 ). Mandibles short, with moderately narrow basal portion, with small distinct preapical tooth on right mandible ( Fig. 9 ). Labium wide, with elongate submentum ( Fig. 13 ). Apical segment of maxillary palp about twice as long as preceding segment ( Fig. 11 ). Gular sutures with widely rounded apical part, more or less narrowly diverging posteriad; shortest distance between sutures located at level of posterior third of eyes (Fig. 15). Antenna moderately long, reaching anterior third of length of elytra when reclined; length × width of antennomeres (lectotype): 1: 0.25 × 0.07; 2: 0.16 × 0.05; 3: 0.17 × 0.05; 4–8: 0.13 × 0.05; 9–10: 0.11 × 0.07; 11: 0.17 × 0.07.

Pronotum transverse, twice as wide as long, 1.5–1.7 times as wide as head, widest in front of middle, evenly narrowed posteriad and anteriad; apical margin distinctly narrower than posterior margin, sinuately emarginate and widely rounded; anterior angles more or less widely rounded, distinctly protruded anteriad; posterior angles obtuse; lateral edges of pronotum with regular small, smooth crenulation; pronotum with wide, slightly elevated middle portion, with wide, indistinct to distinct, short or long longitudinal impression reaching basal third of pronotum, with a pair of moderately deep semioval impressions on mediobasal third; lateral portions distinctly explanate, each with deep oval pit at middle. Prothorax (Fig. 17) with elongate intercoxal process and wide, strongly protruded mesosternal processes. Mesothorax (Fig. 23) transverse, moderately narrow in middle, with acute intercoxal process almost reaching posterior margin of mesocoxae. Scutellum (Fig. 19) with triangular apex. Metathorax (Fig. 25) wide, with wide and deep intercoxal cavities and wide intercoxal process. Metendosternite with long paired medioapical protrusions (Fig. 27).

Elytra about as long as wide, slightly less than three times as long as pronotum, slightly or distinctly widened apicad, reaching apical margin of abdominal tergite IV or VI, with widely rounded apical margins truncated at suture; shoulders of elytra indistinctly protruded anteriad (Fig. 21); lateral portions of elytra narrow to moderately wide, slightly explanate, latero-apical margins with small acute crenulation, flattened and reduced in middle; middle part of each elytron with irregular, indistinct to distinct elevations between punctures, sometimes forming three very indistinct longitudinal elevations. Wings fully developed.

Abdomen distinctly narrower than elytra, with pair of small rounded tomentose wing-folding spots in middle of tergite V; intersegmental membranes between tergites IV–VII narrow to wide, covered by brickwall-like sculpture.

Male. Apical margin of abdominal tergite VIII ( Fig. 33 ) and sternite VIII ( Fig. 34 ) vaguely sinuate. Aedeagus ( Fig. 81 ) with median lobe very wide basally, gradually, markedly narrowed toward rounded apex; parameres narrow, slightly exceeding apex of median lobe, with two small apical and preapical setae; internal sac very narrow and moderately long, with curved basal portion. Aedeagus laterally as in Fig. 82 .

Female. Apical margin of abdominal tergite VIII ( Fig. 35 ) straight. Apical margin of abdominal sternite VIII ( Fig. 36 ) narrowly rounded. Genital segment ( Fig. 37 ) with narrow elongate sternite IX, gonocoxites moderately narrow, slightly widened basally, styli elongate and narrow.

Comparative notes. Based on the general shape of the distinctly transverse pronotum and the wide elytra with indistinct to distinct longitudinal elevations between punctures, A. monticola is most similar to the Himalayan A. altivagans and Chinese A. confucii Shavrin & Smetana , sp.n. and A. laozii Shavrin & Smetana , sp.n. From A. altivagans it differs by anterior angles of pronotum strongly protruded anteriad and by the lack of sclerotized teeth in internal sac of aedeagus; from A. confucii sp.n. by smaller punctation of elytra and by obtuse posterior angles of pronotum; from A. laozii sp.n. by darker elytra, coarser microsculpture of basolateral portions of head and larger punctation of distinctly longer elytra. Additionally, from A. altivagans and A. confucii sp.n. it differs by slightly longer elytra; from A. confucii sp.n. and A. laozii sp.n. by the lateral portions of narrower pronotum evenly narrowed posteriad and anteriad. From all these species, A. monticola differs by wider aedeagus and the very narrow internal sac.

Distribution. The species is known from Pakistan, India (Himachal Pradesh, Uttarakhand), and from western and central Nepal ( Fig. 83 ).

Bionomics. Specimens were collected at elevations from 2100 to 3750 m a.s.l. Specimens from Nepal were taken by sifting leaf litter in Rhododendron forest and Rhododendron - Abies forest, by sifting wet moss, various

debris and fallen leaves along a small brook (J. Schmidt, pers. comm.). Specimen from Jaljala La was sifted together with A. sociale , specimen from Sundar Danda with A. besucheti sp.n. (see below). Remarks. Anthobium monticola is here recorded for the first time from Pakistan and Nepal.

Figures

FIGURE 83. Distribution of Anthobium monticola in the Himalayan Region.

FIGURES 6–13. Mouthparts (dorsal view) of Anthobium fusculum group (6, 8, 10, 12—A. fusculum, 7, 9, 11, 13—A. monticola): 6–7—labrum, 8–9—mandibles (left and right), 10–11—maxilla (right), 12–13—labium and submentum. Scale bar: 0.1 mm.

FIGURES 74–78. Habitus of Anthobium fusculum group: 74—A. liliputense (paratype), 75—A. monticola (NEPAL: Lamjung), 76—A. rugosum (NEPAL: Dhaulagiri), 77—A. sociale (INDIA: Uttarakhand), 78—A. splendidulum (CHINA: Yunnan, Gaoligong Shan). Scale bar: 1.0 mm.

FIGURES 28–37. Abdominal segments of Anthobium fusculum group (28–32—A. fusculum, 33–37—A. monticola): 28, 33—male tergite VIII (dorsal view), 29, 34—male sternite VIII (ventral view), 30, 35—female tergite VIII (dorsal view), 31, 36—female sternite VIII (ventral view), 32, 37—female genital segment (dorsal view). Scale bar: 0.1 mm.

FIGURES 79–82. Aedeagus of Anthobium liliputense (79–80: holotype) and A. monticola (81–82: NEPAL: Lamjung): 79, 81—parameral view, 80, 82—lateral view. Scale bar: 0.1 mm.