Anisolabella haasi, Kočárek, 2014

Kočárek, Petr, 2014, Earwigs (Dermaptera) of Socotra Island: checklist, distribution, and description of a new genus and four new species, Acta Entomologica Musei Nationalis Pragae 54, pp. 1-21 : 11-13

Anisolabella haasi sp. nov.

( Figs 16–19 , 27 )

Type locality. Yemen, Homhil basin, 12°34.5′N, 54°18.5′E, 360-500 m a.s.l.

Material examined. HOLOTYPE: J, ‘ Yemen, Socotra Island / Homhil protected area / open woodland with Boswellia & / Dracaena trees; 10.-11.vi.2012 / 12°34.5′N, 54°18.5′E, 360-500 m // Socotra expedition 2012 / J. Bezděk, J. Hájek, V. Hula, P. Kment, I. Malenovský, J. Niedobová & L. Purchart lgt. // HOLOTYPUS / Anisolabella / haasi sp. nov. / det. P. Kočárek 2013 ’ ( NMPC).

Description. Male. Body pale yellowish to reddish brown, shiny; head reddish brown, antennae, pronotum, mesonotum, metanotum and legs yellowish brown, abdomen and forceps reddish brown. Cuticle regularly punctured, shiny; tegmina and wings entirely absent.

Head ( Fig. 16 ) as long as wide, postfrontal and coronal sutures fine, but distinct, frons and vertex convex, posterior margin of head feebly emarginate in middle. Eyes blackish brown, approximately 0.5 times as long as length of head posterior to eyes. Antennae of holotype with 20 antennomeres (incomplete); antennomere 1 shorter than distance between antennal bases, narrowed basally, widened terminally, as long as antennomeres 2–4 combined; antennomere 2 transverse, slightly longer than wide; antennomere 3 shorter than antennomeres 4–5 combined. Antennomeres 2–20 conical, distal antennomeres relatively short, 3.0–3.5 times longer than wide. All antennomeres pubescent, setae short.

Pronotum ( Fig. 16 ) smooth, about as long as broad, slightly widened posteriorly, margins nearly straight; median sulcus well-distinct. Meso- and metanotum transverse, smooth; mesonotum slightly emarginate posteriorly, metanotum broadly emarginate. Median sulcus visible on mesonotum, on metanotum absent. Legs comparatively short, yellowish brown; femora stout; tibiae with thick and fine setae; metatarsi with metatarsomere 1 slightly longer than length of metatarsomeres 2–3 combined.

Abdomen ( Fig. 16 ) densely regularly punctulate, tergites (except for ultimate tergite) convex, somewhat widened posteriorly; lateral glandular folds not visible. Ultimate tergite transverse, punctate, sides convex, slightly narrowed posteriorly, slightly depressed medially, median longitudinal furrow not visible, posterior margin rugoso-striate. Penultimate sternite widely rounded posteriorly with posterior margin roundly emarginate ( Fig. 17 ). Pygidium flat. Male forceps bicoloured, proximal half reddish brown, distal part blackish brown, asymmetrical, right branch more curved in middle than left one. Both branches remote and stout at base, tapering apically, with apices gently hooked; inner margin finely crenulated, dorsally trigonal in basal half, cylindrical posteriorly.

Genitalia ( Figs 18, 19 ) with oval short parameres, parameres 1.4 times longer than broad, broadened in the distal third, rounded apically and weakly emarginate in middle ( Fig. 19 ). Longer genital lobe robust and short, 1.6 times longer than length of paramere ( Fig. 18 ).

Female. Unknown.

Measurements. Total body length without forceps 11.4 mm, length of forceps 2.0 mm.

Differential diagnosis. Anisolabella haasi sp. nov. differs from the other species of the genus Anisolabella in the following combination of characters: antennomeres 2–20 are conical, distal antennomeres are short, 3.0–3.5 times longer than wide; all abdominal tergites of male are densely regularly punctulate, without keels or ridges laterally, penultimate sternite of male is widely rounded posteriorly, with posterior margin roundly emarginate; parameres of male genitalia are oval, broadened in the distal third, rounded apically and weakly emarginate in the middle. From the other Anisolabella species occurring on Socotra Island, A. planata sp. nov., it can be distinguished using the identification key below.

Etymology. The species is dedicated to Fabian Haas ( Germany), my dermapterist colleague, who first revisited the earwigs of Socotra and thus inspired this study.

Bionomy. Unknown. Collected in an open woodland with Boswellia elongata and Dracaena cinnabari trees on limestone plateau.

Distribution. Yemen, Socotra Island ( Fig. 27 ). Most likely an endemic species.

Figures

Figs 16–19. Anisolabella haasi sp. nov. 16 – habitus of male holotype; 17 – male penultimate sternite, ventral view; 18 – male genitalia; 19 – right paramere of male genitalia.

Figs 27–29. Sketch maps of Socotra Island displaying the known and newly recorded distribution of Dermaptera. Published records are based on HAAS at al. (2004); the occurrence of Labidura riparia (Pallas, 1773) on Samha Island published by these authors is not displayed.