Macrocoma niedobovae, 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 : 477-478

Macrocoma niedobovae sp. nov.

( Figs. 84–89 , 133–134 , 144 )

Type locality. Yemen, Socotra Island, Deiqub cave env.

Type material. HOLOTYPE: J, ‘ Yemen,Socotra Isl., Deiqub cave env., 10.vi.2010, V.Hula & J. Niedobová leg.[printed white label] ; Holotypus Macrocoma niedobovae n. sp. S. Zoia det. 2012 [printed red label]’ ( NMPC). PARATYPES (114 spec.): ‘ Yemen, Socotra Isl. , Deiqub cave env., 10.vi.2010, V. Hula & J. Niedobová leg.’ (3 JJ 1 ♀ NMPC; 1 J 1 ♀ SZCM) ; ‘ Yemen, Socotra Isl., S, Noged plain, Deiqyub cave env., 16.vi.2009, L. Purchart lgt.’ (1 J NMPC; 1 J 1 ♀ JBCB; 1 ♀ SZCM) ; ‘ Yemen, Socotra Island S, Noged plain, Deiqyub Cave, 16.vi.2009, L. Purchart lgt.’ (1 ♀ NMPC; 1 J SZCM) ; ‘ 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.’ (56 JJ 24 ♀♀ NMPC; 5 JJ 4 ♀♀ JBCB; 8 JJ 5 ♀♀ SZCM) .

Description. Habitus as in Figs. 133–134 ; body length of holotype 2.9 mm, of paratypes 2.6–3.1 mm (JJ), 2.6–3.1 mm (♀♀).

Body black with metallic reflections; head, pronotum and elytra dark with bronze metallic reflections; labrum black, mandibles dark brown to black, palpi dark brown; antennomeres I–VI reddish, scape partially darkened, antennomeres VII–XI dull, blackish; legs with some metallic reflections, femora black, tibiae dark reddish to blackish, tarsi reddish with distal portion of each segment usually darkened.

Frons convex, with thin longitudinal median sulcus; pubescence of frons and clypeus relatively long, silvery, absent along median sulcus; punctation strong, close; surface between punctures convex, shiny; clypeus not separated from frons, its distal border concave, V-shaped. Two apical maxillary palpomeres oblong, penultimate nearly two thirds of ultimate one in length, 1.5 times longer than wide. Antennomere I nearly 1.2 times longer than II and nearly 1.2 times as wide, feebly bent on outer side; antennomere II two times longer than wide; antennomere III one third shorter than II, one third longer than wide; antennomeres IV and V subequal to III; antennomere VI slightly wider; antennomeres VII–X dull, widened, VII the widest, nearly two times wider than VI, antennomeres VIII–X transverse; antennomere XI 1.2 times longer than wide.

Pronotum 1.1–1.2 times wider than long (1.1 × 0.9 mm in holotype), sides regularly curved in males, widest in middle, more cylindrical and widest in basal third in females; base as wide as distal border; lateral margin absent; surface with strong, close punctation; pubescence long, silvery.

Scutellum subquadrate, sides feebly concave, distal border either straight or feebly convex, punctured, with relatively long silvery pubescence.

Hypomeron shiny, with strong and close punctation and long silvery pubescence; distal border of prosternum regularly concave, of hypomerae nearly straight; notosternal suture nearly vanished; prosternum 1.5 times longer than wide between procoxae, nearly flat, strongly punctate, with long silvery pubescence. Mesoventrite short, slightly wider than prosternum between procoxae, its distal edge nearly straight, surface regularly punctured, with fine pubescence; mesepimera finely punctured, pubescent. Metaventrite incised along median line, with strong punctures and moderately long silvery pubescence, distal border shortly incised medially; metacoxae little more spaced than mesocoxae; metanepisterna lightly tapering toward rear, nearly 4.5 times longer than wide, punctured and finely pubescent.

Elytra 1.3–1.4 times longer than wide at humeri (1.8 × 1.4 mm in holotype); surface regularly convex, humeri distinct; sides subparallel from humeri up to half (J) or three fifths (♀) of their length, then regularly curved to apex; apices at slightly acute angle; punctation relatively strong, arranged in nearly regular rows alternating with lines of recumbent fine silvery setae (10 rows on each elytron, the tenth along lateral elytral margin) and lines of erected wider setae (10 rows on each elytron) ( Fig. 89 ). Epipleura gradually tapering toward rear, relatively strongly punctured, pubescent.

Legs moderately long; femora with small median tooth, moderately swollen; pro– and metatibiae nearly straight, mesotibiae feebly arched, with fine silvery pubescence. Pro– and mesotarsi slightly widened in males, with tarsomere I wider than tarsomere 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. 84–85 .

Spermatheca as in Fig. 88 ; coxites short, conical, sclerotized; spiculum ventrale relatively long and thin; vagina without any sclerotization.

Differential diagnosis. Macrocoma niedobovae 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. hulai sp. nov. from which it differs mainly in its larger size and the absence of a small and flat tubercle on pronotal sides. A related species from Eastern Africa, Macrocoma fuscoaenea ( Chapuis, 1879) , differs in reddish antennae and legs, more cylindrical prothorax, finer elytral punctation, and sparser dorsal pubescence.

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

Figures

Figs. 84–89. Macrocoma niedobovae sp. nov. (84–85, 87, 89:J holotype; 86:J, Deiqub cave; 88:♀, Deiqub cave): 84 – aedeagus, apex, dorsal view; 85 – aedeagus, lateral view; 86 – tegmen; 87 – ventral sclerite of sternite IX; 88 – spermatheca; 89 – elytral punctation and pubescence.

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).