Miridiba quasisinensis Keith, 2020

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 : 68

Miridiba quasisinensis Keith, 2020

Miridiba (Pledina) quasisinensis Keith, 2020: 1 , figs 1–3 (type loc.: Kon Tum, Ngoc Linh, Vietnam).

Diagnosis

See Keith (2020).

Remarks

Keith (2020) described Miridiba (Pledina) quasisinensis based on the male holotype and four paratypes (three male and one female). The characters antenna 10-segmented, pronotal surface densely punctate and collum with a membranous area in dorsal view ( Keith 2020: figs 2–3), similar to M. sinensis and M. pseudosinensis , allow us to include M. quasisinensis in the morphotype V “ sinensis ”. In addition, the presence of a membranous lateral area joining the dorsal and ventral branches laterally proves the lateral fusion process of these branches. The fusion process is from partial in M. axanensis until the complete fusion observed in M. quasisinensis with membrane without sclerotization and M. sinensis and M. pesudosinensis completely sclerotized with scars.

Distribution

Vietnam.

Species included in Morphotype VI “Borneensis”

The group is composed of two species, which are characterized by antenna 10-segmented, pronotum with scattered punctures (distance between punctures greater than diameter of puncture), pronotal surface depressed just behind anterior margin, metacoxa with whitish scales, and male and female genitalia as specified above. Matsumoto (2005) transferred Holotrichia borneensis Moser, 1918 and Holotrichia coxalis Arrow, 1944 to the genus Pentelia Brenske, 1891 . However, both species showed differences with Pentelia discendens ( Sharp, 1881) (type of Pentelia ) in the shape of parameres and antennal club. After studying type specimens of P. borneensis and P. coxalis , both species show features of external morphology that characterize the genus Miridiba (pubescence of the mentum, labrum shape, frontal carina, tuft at tarsal segments and carina on foretibiae). Hence, we transfer these two species to the genus Miridiba . On the other hand, the presence of genital characters not shared with other Miridiba species leads us to propose the morphotype VI “ Borneensis ”.