Pseudometrioxenina Legalov, 2023

Legalov, Andrei A., 2023, New subtribe and genus of the Metrioxenini (Coleoptera, Belidae) from the Oriental Region, Ecologica Montenegrina 62, pp. 38-41 : 39

Subtribe: Pseudometrioxenina Legalov , subtrib. nov. ( Figure 1 )

https://zoobank.org/ urn:lsid:zoobank.org:act:9EEB91B2-33CF-436C-A60C-E7D9DD79BB98

Type genus: Pseudometrioxena Legalov , gen. nov.

Diagnosis. Body brownish, almost glabrous or with fine pubescence; rostrum almost straight or weakly curved, slightly longer or subequal to pronotum, with two weak longitudinal carinae, with ventral long erect setae in males; longer than pronotum, narrow, weakly curved, without carinae and setae ventrally in females; antennae inserted near rostrum basis; forehead flattened; eyes large, convex, finely faceted; head behind eyes with constriction; temples quite short; antennae long with 8-segmented funicle; Antennal club twosegmented; pronotum campaniform, weakly convex, with teeth on sides; disc with five longitudinal carinae; humeri slightly smoothed; elytral disc with four longitudinal carinae or they reduced, without striae, densely punctate; elytral apex; precoxal part of prosternum strongly elongated in males and slightly elongated in females; first abdominal ventrite elongated; femora widened, with or without teeth; profemora more strongly widened; tibiae short and wide; tarsi wide; second and third tarsomeres bilobed; claws without teeth.

Comparison. The new subtribe differs from the subtribe Metrioxenina in the rostrum in males with long erect setae ventrally, the femora always lacking tooth and metatibiae almost straight in males.

Composition. Three Recent genera, Vladimirixena Legalov, 2009 , Pseudometrioxena Legalov , gen. nov., Wallacexena Legalov, 2009 and the genus Archimetrioxena Voss, 1953 from late Eocene Baltic amber.

Modern distribution. Malaysia ( Malacca), Indonesia (Sumatra, Java and Timor), Philippines.

Figures

Figure 1. Pseudometrioxena decisa, Timor isl.: a – male, habitus, dorsal view; b – male, habitus, ventral view; c – female, habitus, dorsal view; d – male, abdomen; e – male, aedeagus, dorsal view; f – male, aedeagus, lateral view; g – male, tegmen, dorsal view; h – male, eighth tergite, dorsal view. Scale bar = 1.0 mm for a-c, 0.5 mm for d, 0.2 mm for e-h.