Mordellina (Pseudomordellistena) stastnyi, Horák & Farkač & Nakládal, 2012

Horák, Jan, Farkač, Jan & Nakládal, Oto, 2012, Mordellidae (Coleoptera) from Socotra Island, Acta Entomologica Musei Nationalis Pragae 52, pp. 253-268 : 261-262

Mordellina (Pseudomordellistena) stastnyi sp. nov.

( Figs. 32–43 )

Type locality. Yemen, Socotra Island, wadi Zerig, ca. 12°29.6′N, 53°59.5′E, 655 m.

Type material. HOLOTYPE: J, Yemen, Socotra Isl., Zerik , 25.– 27.3.2001, V. Bejček & K. Šťastný leg. ( NMPC) . ALLOTYPE: ♀, same data as holotype ( JHCP) . PARATYPES: 2 JJ 4 ♀♀, same data as holotype ( JHCP) ; 1 J 4 ♀♀, Yemen, Socotra Isl. , Wadi Far, 69 m, 1.4.2001, GPS 12.433N 54.195E, V. Bejček & K. Šťastný leg. ( JHCP) ; 2 JJ 12 ♀♀, Yemen, Socotra Isl. , Calanthia, 29.– 30.3.2001, V. Bejček & K. Šťastný leg. ( JHCP, BMNH, CULS, NMPC) ; 4 ♀♀, Yemen, Socotra Isl. , Ayhaft, 15.3.2000, V. Bejček & K. Šťastný leg. ( JHCP) ; 1 ♀, Yemen, Socotra Isl. , Hamadero, 20.11.2000, V. Bejček & K. Šťastný leg. ( JHCP) ; 1 J 2 ♀♀, Yemen, Socotra Island E, Homhil area , 12°34′25″N 54°18′53″E, 400–510 m, at light, 9.–10.ii.2010, L. Purchart & J. Vybíral leg. ( JHCP) ; 2 JJ 3 ♀♀, Yemen, Socotra Isl. , Zemhon area, 270–300 m, N 12°20.58′ E 054°06.39′ 16.–17.vi.2010, V. Hula leg. ( JHCP) ; 4 ♀♀, Yemen, Socotra Isl. , Firmihin plato, 400–500 m, N 12°28′46″ E 54°00′89″, 18.–19.vi.2010, V. Hula & J. Niedobová leg. ( JHCP) .

Description. Male holotype. Body ( Fig. 32 ) slender, sides rather rounded and only moderately convex. Ground colour yellowish-brown, only anteclypeus, entire maxillary palpi, anterior legs, mesotibiae and terminal spurs of metatibia yellow. Pubescence of dorsal surface goldenyellow, without lustre.

Body length from tips of mandibles to tips of elytra 3.3 mm, to tip of pygidium 4.1 mm.

Head rather flatly convex, sparsely punctate, distinctly wider than long (width to length ratio 6.0: 5.0), distinctly narrower than pronotum (ratio of head width to pronotal width 6.0: 7.5). Eyes ( Fig. 33 ) large, coarsely facetted, with short and rather dense setae. Temples not developed, only temporal angles moderately distinct. Maxillary palpomeres II–III ( Fig. 34 ) almost equally broad, terminal palpomere securiform with strongly rounded inner angle. Antennae ( Fig. 36 ) of medium length, antennomeres IV and V almost subequal, antennomeres V–X approximately 1.6 times longer than wide, terminal antennomere narrowly oval, twice as long as wide and nearly one third longer than preceding one.

Pronotum flat, widest at basal third, wider than long (width to length ratio 7.5: 6.0), anterior margin semicircular, with short and distinct neck-shaped protuberance. Lateral margins in lateral view gently emarginate, posterior angles almost rectangular with rounded apex. Punctation sparse, rasp-like.

Scutellum small, triangular, with dense and rather fine rasp-like punctation, covered with golden-yellow pubescence.

Elytra distinctly convex, rounded at sides, 2.4 times longer than their combined width, separately rounded at apex.

Pygidium narrowly conical, 2.3 times longer than hypopygium and reaching about one third of elytral length.

Protibiae ( Fig. 38 ) straight, with long calf-like swelling and without longer setae at base. Protarsus only indistinctly narrower than protibia. Protarsomere I nearly 1.3 times longer than protarsomere II. Protarsomere IV 2.5 times as long as wide and truncate at apex, terminal protarsomere long and narrow, overlapping it by one third of its length. Mesotarsi distinctly shorter than mesotibiae. Metatibiae ( Fig. 39 ) besides short and rather oblique apical ridge with two very long and oblique lateral ridges, upper ridge longer than lower one. Metatarsomeres I and II with two very oblique ridges, metatarsomere III without ridges. Outer terminal spur of metatibia small, reaching one fourth of inner one.

Male genitalia as in Figs. 40–42 , shape of urosternite VIII as in Fig. 43 .

Female allotype. Female more robust and convex, with strongly arcuate sides. Terminal maxillary palpomere ( Fig. 35 ) with strongly rounded inner angle. Protibia without calf-like swelling and without longer setae at base. Pygidium shorter and broadly conical, only one third longer than hypopygium. Body length from tips of mandibles to tips of elytra 3.7 mm, to tip of pygidium 4.2 mm.

Variability. Body shape and colour uniform. Total length, measured from tips of mandibles to apex of pygidium, varying between 2.8 and 5.3 mm.

Differential diagnosis. The new species is similar to M. (P.) fuscocastanea Ermisch, 1952 from the Congo ( ERMISCH 1967), from which it is distinguished at first glance by robust body, different proportions of antennomeres and shape of pygidium. Diagnostic characters are included in key to species.

Etymology. New species is dedicated to our teacher and friend Karel Šťastný, who underwent, along with Vladimír Bejček (both Czech University of Life Sciences, Prague, Czech Republic), the research in Socotra Island, which lead to the discovery of this species.

Figures

Figs. 32–43. Mordellina (Pseudomordellistena) stastnyi sp. nov. 32 – habitus; 33 – eye; 34–35 – maxillary palpus; 36–37 – antenna; 38 – protibia and tarsus; 39 – metatibia and tarsus; 40 – paramere; 41 – phallobasis; 42 – apical part of penis; 43 – sternite VIII. 32–34, 36, 38–42 – holotype (J); 35, 37 – allotype (♀) Scale: a – 34–35; b – 40; c – 32; d – 39, 41–42; e – 33; f – 36–38; g – 43.