Miridiba thai Keith, 2010

Gao, Chuan-bu & Coca-Abia, María Milagro, 2021, Revision of the genus Miridiba Reitter, 1902 (Coleoptera, Scarabaeidae, Melolonthinae): genital morphotypes and new taxonomic data, European Journal of Taxonomy 749, pp. 1-94 : 42-43

Miridiba thai Keith, 2010

Figs 57–59

Miridiba thai Keith, 2010: 235 , figs 4–6 (Chiang Mai, Thailand).

Diagnosis

External morphology of adult ( Fig. 57 ). Body size 20.5 mm. Dorsal surface glabrous, at most, with tiny setae in each puncture hardly visible. Clypeus shorter than frons, concave, oblique sides, with anterior edge emarginate at middle. Frons with strong carina. Pronotal anterior margin widely flanged, with a perpendicular anterior face glabrous, with concavity at each lateral end; posterior margin, glabrous, finely flanged except at middle; lateral margins smooth and glabrous, elevated at fore half; anterior angles acute, not projected forward; posterior angles obtuse and rounded. Prosternal process coneshaped. Scutellum with dense punctures except at lateral sides. Elytra with dense punctures except on sutural costae; epipleuron with pubescence on basal half. Foretibia with develop dorsal carina. Meso- and metatibia with complete transverse carina moderately developed; inner margin of dorsal surface with sparse but conspicuous spines. Prepygidium regularly punctate and with short pubescence. Pygidium irregularly punctate, with conspicuous pubescence longer on apex. Ventrite 5 moderately depressed at posterior half, with pubescence on surface, longer on depressed part. Ventrite 6 with anterior margin bulky and without punctures, posterior half moderately concave with long pubescence. Male genitalia: parameres ( Fig. 58 ) without pubescence; dorsal branches and collum continuous, apices convergent; ventral branches with apices moderately bent outwards. Endophallus ( Fig. 59 ) arising from middle of temones apophysis, short, thin and with spines at distal end. Apophysis of temones ( Fig. 59 ) very long and strongly sclerotized separated from each other at distal end, with a distal membrane at apices armed with spines. Female genitalia not studied.

Material examined

Holotype

THAILAND • ♂; “THAILANDE N” [Northern Thailand], “ Chiang Dao Hill resort ” [in Chiang Dao District , Chiang Mai]; 7–10 Jun. 2008; Murzin leg.; “ HOLOTYPE ”; “ Miridiba thai nov. sp. Det. D. KEITH & G. SABATINELLI 2009”; DKC.

Remarks

Keith (2010) described Miridiba thai based on three specimens, two males and one female, and designated a holotype, a paratype and an allotype, respectively. We have studied the holotype and verified that this species shows features of external morphology that characterize Miridiba . Besides, the parameres show two dorsal and two ventral branches separated from each other (Keith 2010: figs 5–6) and antenna 9-segmented (not 10-segmented as was specified in the original description of Keith 2010), which characterize morphotype I “ Trichophora ”. Hence, this species is included in this genital morphotype.

Distribution

Thailand (Chiang Mai).

Figures

Figs 57–59. Miridiba thai Keith, 2010, holotype, ♂ (DKC). 57. Habitus in dorsal view. 58. Parameres in dorsal (A), ventral (B) and lateral (C) views. 59. Endophallus and temones in lateral view. Scale bars: 57 = 5.0 mm; 58–59 = 1.0 mm.