Thaumastopeus pugnator insulanus, Jákl, 2011

Jákl, Stanislav, 2011, Description of seven new taxa of Cetoniinae from Indonesia (Coleoptera: Scarabaeidae), Acta Entomologica Musei Nationalis Pragae 51 (2), pp. 535-550 : 548-549

Thaumastopeus pugnator insulanus subsp. nov.

( Figs. 7a–c )

Type locality. Indonesia, North Sumatra province, Nias Island.

Type material. HOLOTYPE: J ( NMPC):‘ Indonesia, Nias island , X. 1993 [handwritten], native collectors’ . PARATYPES: ♀ (no. 1), same label data as holotype ( SJPC) ; J (no. 2), ♀ (no. 3): ‘ Indonesia, Nias island , 1. 1995 [handwritten], native collectors’ ( SJPC) .

Description. Holotype length 28.8 mm, maximum humeral width 11.4 mm. Narrow, rather parallel-sided; dark olive green with golden reflection.

Head. Dark green, shining, widest in apical third. Frons simply punctate. Clypeus with two densely wrinkled lateral furrows.Apex of clypeus deeply incised, its apical margin sharp but termination obtuse. Antenna moderately long, stalk black, club dark brown, setation brownish.

Pronotum. Olive to green with golden-metallic reflection. From base sharply narrowing to apex. Lateral margins with double emargination, first very mild in front of anterolateral margin, second deeper in front of posterolateral margin. Microreticulation densely developed throughout length. Apical half of lateral margins with fine wrinkles.

Scutellum. Small, dark green, shining. Moderately narrowing to apex, here obtusely rounded. Impunctate.

Elytra. Olive to green with golden lustre. Basal half almost parallel-sided, apical half moderately narrowing toward apex. Apical two-thirds laterally wrinkled, wrinkles denser along apical third.Apex and apical calli also with moderately developed wrinkling. Each elytron with three to four indistinctly punctured lines. Fine microreticulation present throughout length. Basal half also with three to four irregularly shaped transverse impressions. Humeral calli small, apical calli not developed. Epipleura present only in basal half. Sutural ridge elevated in apical third, its termination rather obtuse, indistinctly protruding over apex.

Pygidium. Brownish with green-metallic lustre. Densely wrinkled throughout length.

Venter. Abdomen brownish with green reflection. Each ventrite laterally wrinkled, middle part impunctate, but microreticulated. Metasternum green with mild lustre, laterally wrinkled, middle part only with microreticulation. Mesometasternal process long and robust, sharply pointed at apex, not reaching level of procoxae. Prosternum and mentum dark green, wrinkled, with blackish setation.

Legs. Femora, tibiae and tarsi dark green, with mild lustre. Tibiae and tarsi elongated. Protibiae tridentate. Meso- and metatibiae with carina approximately between posterior third and fourth.

Male genitalia. Similar to other subspecies ( Figs. 7d–e ).

Sexual dimorphism. Both female paratypes are bigger, 29.0 and 32.5 mm. Punctation of the pronotum is almost the same as in the holotype male, but punctation of elytra is more developed. Both specimens have eight punctate lines on each elytron. The body is wider and much more robust. Also legs are more robust, especially the protibia. The abdomen is more arched, without a distinct abdominal furrow.

Differential diagnosis. Thaumastopeus pugnator insulanus subsp. nov. differs from the nominotypical subspecies by the much less developed punctation of pronotum and elytra, shining appearence, body slender and more parallel-sided, and also by smaller size. From Thaumastopeus pugnator arrowi Allard, 1995 , described from northern Thailand, new subspecies differs by the presence of elytral punctured lines ( T. pugnator arrowi has elytra only indistinctly punctate) and by the punctation of the pronotum, which is finer than in the nominotypical subspecies, but still present (almost glabrous in T. pugnator arrowi ).

Etymology. The name emphasizes that this is the first population of Thaumastopeus pugnator discovered on a small island off the continental mainland or large islands of the Great Sundas (Sumatra, Java).

Distribution. Nias Island, Indonesia.

Figures

Figs. 6–7. 6 – Thaumastopeus striatus siberutanus subsp. nov.; 7 – T. pugnator insulanus subsp. nov. a – habitus dorsally; b – habitus laterally; c – habitus ventrally; d – aedeagus apically; e – aedeagus laterally. Not in scale.