Centroscelis (Centroscelis) kadleci, Bezděk & Daccordi & Kantner, 2012

Bezděk, Jan, Daccordi, Mauro & Kantner, František, 2012, Centroscelis kadleci sp. nov. from Yemen and a new synonymy in the genus Centroscelis (Coleoptera: Chrysomelidae: Chrysomelinae), Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 237-244 : 238-242

Centroscelis (Centroscelis) kadleci sp. nov.

( Figs. 1–13 )

Type locality. South Yemen, Kawr Saybān Mt., NW of Al Mukallā, 14°37′N, E 49° 03′ E.

Type material. HOLOTYPE: ♂, ‘S YEMEN, Kawr Saybān Mt. / NW Al Mukallā , N 14°37’ / E 49° 03’, 29.III.2007 / lgt. S. Kadlec [w, p]’ ( NMPC). PARATYPES: 12 ♂♂ 32 ♀♀, same data as holotype (1 ♂ 4 ♀♀ in NMPC, 4 ♂♂ 11 ♀♀ in FKCK, 3 ♂♂ 9 ♀♀ in JBCB, 4 ♂♂ 3 ♀♀ in MDCV, 2 ♀♀ in NHMB, 2 ♀♀ in BMNH, 1 ♀ in ZMHB); 5 ♀♀, ‘S YEMEN, Kawr Saybān Mt. / NW Al Mukallā , N 14°37’ / E 49° 03’, 575 m / lgt. S. Kadlec, 29.III.2007 [w, p]’ ( FKCK) ; 7 ♂♂ 25 ♀♀, ‘S YEMEN, Kawr Saybān / Mt., NW Al Mukallā / N 14°37’ E 49° 03’ 575m / 29.III.2007 S. Kadlec lgt. [w, p]’ ( JVCJ); 1♂ 2♀♀, ‘S Yemen, Kawr Saybān mt. / NW Al Mukallā , 29.III.2007 / N14°37’ E49° 03’, 575 m, / lgt. S. Kadlec [w, p]’ ( JVCJ). The specimens are provided with additional printed red labels: ‘ HOLOTYPUS [or PARATYPUS], / Centroscelis / kadleci sp. nov., / Bezděk, Daccordi & / Kantner det., 2011’.

Description. Body length:♂♂ 5.2–5.7 mm (holotype 5.2 mm), ♀♀ 5.1–6.6 mm; body width: ♂♂ 3.6–3.7 mm, ♀♀ 3.7–4.2 mm; body height: ♂♂ 2.6–2.7 mm, ♀♀ 2.8–3.2 mm.

Male (holotype, Fig. 1 ). Body shortly elongate, strongly convex, glabrous. Head including mouthparts pale orange, lateral parts of ventral side of head and apices of mandibles black. Pronotum mahogany with pale orange anterior and posterior margins, anterior angles, thin stripe from the middle of anterior margin reaching the middle of pronotal disc and two thin oblique stripes from the middle of posterior margin reaching pronotal midlenght. Scutellum dark mahogany. Elytra pale orange with black extreme anterior margin, wide sutural margin, spot on humeral callus touching anterior margin, posthumeral spot touching humeral one, postscutellar spot widely touching sutural margin, postmedian spot touching sutural margin and large elongate lateroapical spot touching both elytral apex and postmedian spot. Prosternum pale orange with central part mahogany. Meso- and metasternum black with paler extreme posterior margin of metasternum. Abdomen black, last ventrite with posterior margin and transverse furrow along posterior margin orange. Antennae orange with last 5 antennomeres darkened. Legs orange with basal halves of pro- and mesofemora and basal three quarters of metafemora infuscated.

Labrum lustrous, wide and short, lateral margins rounded and convergent, anterior margin with distinct shallow incision, with 6 large punctures in transverse row along basal margin, laterally covered with several long pale setae. Clypeus and frons semiopaque, covered with sparse large punctures, more dense at ocular margins, sparsely mixed with very fine punctures. Frontoclypeal suture very widely obtusangulate. Eyes elongated. External margin of mandibles with shallow hollow covered with large punctures. Maxillar palpomeres elongated, last palpomere truncated apically, not dilated ( Fig. 8 ). Antennae ( Fig. 12 ) short, not reaching the posterior margin of pronotum.

Pronotum transverse, twice as wide as long (pronotal length 1.4 mm, width 2.8 mm), widest at posterior angles, strongly convex with even surface, glabrous. Middle part of anterior margin straight, laterally bent anteriorly, lateral margins convergent, nearly straight, posterior margin widely regularly rounded. All margins very thinly bordered. Anterior angles moderately protruding anteriorly, widely rounded, posterior angles nearly rectangular. Surface lustrous, disc sparsely covered with small punctures, towards lateral margins with gradually larger and deeper punctures (Fig. 4). Posterior angles with distinct setigerous pore bearing pale seta, anterior angles with setigerous pore placed on ventral margin (invisible from dorsal view), only long pale seta visible. Scutellum large, as wide as long, widely rounded with almost indistinct tip, lustrous, impunctate.

Elytra glabrous, semiopaque, strongly convex, widest in the middle, 0.7 times as long as body and 1.05 times as long as wide (measured in elytral midlength), densely covered with small confused punctures and sparsely with very fine wrinkles (more distinct on lateral sides of posterior third). Humeral calli distinct, wide, impunctate, sparsely covered with fine wrinkles. Epipleura glabrous, impunctate, moderately wide in anterior third, in middle part gradually narrowed, in posterior third thin, reaching elytral tip; in lateral view visible for its entire length. Macropterous. Ventral surface semiopaque, sparsely covered with small punctures with short pale setae. Proepimera distinctly concave, covered with irregular striae. Prosternum narrow with sparse large punctures, prosternal process short, slightly enlarged posteriorly, covered with large punctures. Mesosternum with deep subtriangular cavity in the middle. Metasternum thinly bordered along anterior margin, with thin longitudinal groove in the middle. Last visible ventrite with semicircular impression in the middle deepest along posterior margin.

All femora short, slightly enlarged. Protibiae slightly widened without any distinct lateral tooth, meso- and metatibiae apically dilated in large tooth.

Protarsomere 1 subtriangular, 1.2 times as long as wide, as wide as protarsomere 2, onychium long, thin, as long as protarsomeres 2 and 3 combined, length ratios of protarsomeres 1–4 equal to 12-8-10-17. Metatarsomere 1 subtriangular, 1.2 times as long as wide, as wide as metatarsomere 2, onychium long, 1.1 as long as metatarsomeres 2 and 3 combined, length ratios of metatarsomeres 1–4 equal to 12-8-8-18. Third tarsomeres of all tarsi undivided. Claws shortly bifid, with inner branch shorter than outer one.

Apex of median lobe of aedeagus with sharp pointed tip, divided in the middle, bent laterally and strongly curved ventrally. Apical part of median lobe with wide lamellar expansion on ventral side. In lateral view, median lobe obtusely bent behind the middle ( Figs. 2, 3 ).

Female has no spermatheca.

Sexual dimorphism. Males differ in the presence of a distinct semicircular impression in the middle of the last visible ventrite, deepest along posterior margin (missing in females). Tarsomeres of all legs in males are slightly wider than in females. Antennae of males are slightly thiner than in females ( Figs. 12, 13 ).

Variability. The coloration of dorsum is very variable amongst the specimens in the type series. Head is usually orange or at most with darker vertex, very rarely almost completely black. Pronotum varies from completely orange (14 % of specimens), through orange with four indistinct brownish spots transversely (7 %), orange with two large mahogany lateral spots (12 %), orange with an irregular confused mahogany pattern (26 %), black with orange lateral sides or anterior corners (9 %), to completely black (32 %). The black elytral pattern varies from the palest with 5 isolated small black spots with postscutellar spots connected at suture ( Fig. 5 ) (7 % of specimens), through small spots slightly touching each other ( Fig. 1 ) (28 %), spots more expanded ( Fig. 6 ) (16 %), elytra almost black with the rest of orange colour ( Fig. 7 ) (7 %), to elytra completely black (42 %). Coloration of femora varies from completely orange to completely black; tibiae are orange in most specimens, only rarely their inner sides are darkened.

Differential diagnosis. Centroscelis kadleci sp. nov. can be easily distinguished from any other described species of this genus by anterior tibiae only slightly enlarged and broadly sinuate in the apical part, without the lateral tooth which is always presented in other Centroscelis species. Onychium on hind tarsi in C. kadleci sp. nov. is longer than tarsomeres 2 and 3 combined while shorter in other Centroscelis species (ratio length of onychium / length of tarsomeres 2 and 3 combined: 1.1 in C. kadleci sp. nov., 0.8 in C. notata ( Fabricius, 1781) , 0.75 in C. decempustulata ( Thunberg, 1787) and 0.8 in C. murrayi ( Baly, 1864)) . Also, the peculiar structure of the median lobe of aedeagus with apex laterally bent and strongly curved down cannot be confused with any other Centroscelis species (all other species have apex laterally straight or only slightly turned down and ventral part of apex always without lamellar extension – for figures see DACCORDI (1983)).

Etymology. This species is dedicated to our good friend and specialist in Cerambycidae , the late Stanislav Kadlec (1948–2008).

Distribution. Yemen. Known only from the type locality.

Figures

Fig. 1. Habitus of Centroscelis kadleci sp. nov. (holotype, male, 5.2 mm).

Figs. 2–3. Median lobe of aedeagus of Centroscelis kadleci sp. nov. (SEM micrographs): 2 – lateral view; 3 – apex in dorso- lateral view.

Figs. 4–13. Details of Centroscelis kadleci sp. nov. 4 – sculpture of pronotum; 5–7 – variability of elytral pattern; 8 – maxillary palpus; 9 – right male protibia and protarsus; 10 – male mesotibia and mesotarsus; 11 – male metatibia and metatarsus; 12 – male antenna; 13 – female antenna. Scale bar = 0.5 mm for Figs. 4 and 8–13, 1 mm for Figs. 5–7.