Macrocoma hulai, Zoia, 2012

Zoia, Stefano, 2012, Eumolpinae (Coleoptera: Chrysomelidae) of Socotra Island, Insect biodiversity of the Socotra Archipelago (Acta Entomologica Musei Nationalis Pragae 52), pp. 449-501 : 480-497

Macrocoma hulai sp. nov.

( Figs. 98–104 , 137–138 , 144 )

Type locality. Yemen, Socotra Island, Diksam plateu, Bidehor, Digeila Cave env., 12°30′31″N, 53°56′18″E, 920 m.

Type material. HOLOTYPE: J, ‘ Yemen, Socotra Island, Diksam plateu, Bidehor, Digeila Cave env., 920 m, 8.ii.2010, N 12°30′31″, E 53°56′18″, L. Purchart & J. Vybíral lgt. [printed white label]; Holotypus Macrocoma hulai n. sp. S. Zoia det. 2012 [printed red label]’ ( NMPC). PARATYPES (49 spec.): ‘ Yemen, Socotra Island, Diksam plateu, Bidehor, Digeila Cave env., 920 m, 8.ii.2010, N 12°30′31″, E 53°56′18″, L. Purchart & J. Vybíral lgt.’ (2 JJ NMPC; 1 ♀ SZCM); ‘ Yemen, Soqotra Is., 1.-2.xii.2003, Dixam plateau: Sirhin area, N12°31′08″ E53°59′09″, 812 m [GPS]; Jan Farkač lgt.’ (1 ♀ CULS; 1 ♀ JBCB; 1 ♀ SZCM); ‘ Yemen, Socotra Isl., Wadi Zirik, 12.vi.2010, N 12°29,584′, E 053°59,475′, V. Hula & J. Niedobová leg.’ (1 J SZCM); ‘ Yemen, Socotra Isl., Thar area, 24.II2009, pitfall trap (TR 92)’ (1J MCSC); ‘ Yemen. Socotra Island, Dixam plateau, 14.-15.vi.2012, Firmihin, Dracaena woodland, 12°28.6′N, 54°01.1′E, 490 m, Socotra expedition 2012, J. Bezděk, J. Hájek, V. Hula, P. Kment, I. Malenovský, J. Niedobová & L. Purchart leg.’ (10 JJ 13 ♀♀ NMPC; 3 JJ 4 ♀♀ JBCB; 3 JJ 6 ♀♀ SZCM); ‘ Yemen, Socotra Island, Dixam plateau, 15.+ 22.vi.2012, wadi Dirhor, open woodland with Boswellia ameero trees, 12°28.0′N, 54°00.5′E, 340 m, Socotra expedition 2012, J. Bezděk, J. Hájek, V. Hula, P. Kment, I. Malenovský, J. Niedobová & L. Purchart leg.’ (1 ♀ NMPC); ‘ Yemen, Socotra Island, Deiqub cave, 12.vi.2012, cave & Croton socotranus + Jatropha unicostata shrubland, 12°23.1′N, 54°00.9′E, 115 m, Socotra expedition 2012, J. Bezděk, J. Hájek, V. Hula, P. Kment, I. Malenovský, J. Niedobová & L. Purchart leg.’ (1 J NMPC).

Description. Habitus as in Figs. 137–138 ; body length of holotype 2.5 mm, of paratypes 2.0– 2.5 mm (JJ), 2.0– 2.6 mm (♀♀).

Body, including head, pronotum and elytra, metallic, dark green with golden reflections; labrum, mandibles and palpi reddish; antennomeres I–VI reddish, antennomere I dorsally darkened, antennomeres VII–XI dull, blackish; legs bicolored, femora metallic, dark greenish with golden reflections, tibiae reddish, darkened proximally; tarsomeres reddish, the ultimate one darkened distally.

Frons almost regularly convex; pubescence of frons and clypeus relatively long, silvery; punctation strong, close; surface between punctures convex, shiny; clypeus not separated from frons, distal border of clypeus concave, V-shaped. Two apical palpomeres oblong, penultimate nearly two thirds of ultimate one in length, nearly as long as wide. Antennomere I nearly 1.2 times longer than II and nearly 1.2 times as wide, feebly bent on outer side; antennomere II

Figs. 19–28. 19–23 – Colasposoma (Falsonerissus) distinguendum sp. nov. (19, 20, 22, 23:J holotype; 22:J, Noged Plain, Qaareh): 19 – aedeagus, apex, dorsal view; 20 – aedeagus, lateral view; 21 – tegmen; 22 – ventral sclerite of sternite IX; 23 – scutellum. 24–28 – Colasposoma (Falsonerissus) villosum sp. nov. (24, 25, 27, 28: J holotype; 26: J, Homhil area): 24 – aedeagus, apex, dorsal view; 25 – aedeagus, lateral view; 26 – tegmen; 27 – ventral sclerite of sternite IX; 28 – scutellum.

two times longer than wide; antennomere III slightly shorter than II, nearly two times longer than wide; antennomeres IV–VI subequal, shorter than III; antennomere VI slightly wider, subquadrate; antennomeres VII–X dull, widened, VII longest, nearly as wide as following ones, VIII–X transverse; antennomere XI 1.2 times longer than wide.

Pronotum nearly as long as wide (0.8 × 0.8 mm in holotype); base as wide as distal bor- der; lateral margin absent; sides near anterior edge with small rounded or oval, low, smooth tubercle ( Fig. 104 ) with single median puncture; pronotal surface with strong, close punctation; pubescence relatively long, silvery.

Scutellum quadrate, not punctured, with few relatively long silvery setae.

Hypomeron shiny, with strong and close punctation and long silvery pubescence; distal margin of prosternum and hypomerae regularly concave; notosternal suture vanished; prosternum 1.4 times longer than wide between procoxae, nearly flat, strongly punctate, with long silvery pubescence. Mesoventrite short, nearly as wide as prosternum between procoxae, its distal edge nearly straight, surface regularly punctured, with long pubescence; mesepimera finely punctured, pubescent. Metaventrite with strong punctures and moderately long silvery pubescence, median line impressed, distal border shortly incised in middle; metacoxae little more spaced than mesocoxae; metanepisterna lightly tapering toward rear, nearly 4.5 times longer than wide, punctured and densely pubescent.

Elytra 1.3–1.4 times longer than wide at humeri (1.4 × 1.1 mm in the holotype); surface regularly convex, humeri distinct; sides subparallel from humeri up to two thirds in J, feebly widened up to three fifths of their length in ♀, then regularly curved to apex; apices at slight acute angle; punctation relatively strong, partly irregular, with alternate lines of recumbent fine silvery setae (10 rows on each elytron, the tenth along elytral lateral margin) and lines of erected wide setae (10 rows on each elytron) ( Fig. 103 ). Epipleura wide proximally, gradually tapering toward rear, relatively strongly punctured, pubescent.

Legs moderately long; femora with small median tooth, moderately swollen; metatibiae nearly straight, mesotibiae feebly arched, with fine silvery pubescence. Pro– and mesotarsi slightly widened in males, pro– and mesotarsomere I wider than II. Claws bifid, with long, subparallel inner tooth, division starting near base of claw.

Dorsal side of abdomen sclerotized, dark in color, with some metallic reflections, pygidium fully covered by elytra; abdominal ventrites punctured and pubescent.

Aedeagus as in Figs. 98–99 .

Spermatheca as in Fig. 102 ; coxites short, conical, sclerotized; spiculum ventrale relatively long and thin; vagina without any sclerotization.

Differential diagnosis. Macrocoma hulai sp. nov. is a small species characterized by elytral pubescence with alternate rows of scale-like setae and thin setae. It is close to M. niedobovae sp. nov. from which it differs mainly in its smaller size and the presence of a small and flat tubercle on the pronotal sides.A related species from Eastern Africa, Macrocoma fuscoaenea , differs in completely reddish antennae and legs, more cylindrical prothorax, finer elytral punctation, and sparser dorsal pubescence.

Etymology. I am pleased to name this species after Vladimír Hula (Brno, Czech Republic), who collected part of the specimens studied.

Collection circumstances. Specimens from Firmihin were collected on flowers of Launaea crepoides Balf. f. (Compositae) (J. Bezděk, pers. comm. 2012).

Figures

Figs. 98–104. Macrocoma hulai sp. nov. (98–99, 101, 103–104: J holotype; 100: J, wadi Zirik; 102: ♀, Bidehor, Digeila cave): 98 – aedeagus, apex, dorsal view; 99 – aedeagus, lateral view; 100 – tegmen; 101 – ventral sclerite of sternite IX; 102 – spermatheca; 103 – elytral punctation and pubescence; 104 – tubercle on pronotal side.

Figs. 129–138. Habitus, dorsal and lateral view of: 129–130 – Colasposoma (Colasposoma) hajeki sp. nov.(Jholotype); 131–132 – Erythraella bicuspidata gen. et sp. nov. (J holotype); 133–134 – Macrocoma niedobovae sp. nov. (J holotype); 135–136 – Macrocoma bezdeki sp. nov. (J holotype); 137–138 – M. hulai sp. nov. (J holotype).

Figs. 139–144. Distribution maps of the species based on the studied material (in Fig. 142, question marks indicate a possible montane form of C. (C.) brevepilosum sensu lato, see species description).