Eryxia, Romantsov & Moseyko, 2020

Romantsov, Pavel V. & Moseyko, Alexey G., 2020, A new subgenus and species of Eumolpinae (Coleoptera: Chrysomelidae) from Azerbaijan, with faunistic notes on adjacent countries, Zootaxa 4853 (1), pp. 139-145 : 140

Subgenus Azerberyxia new subgenus

Type species. Eryxia subgenus Azerberyxia serratotibialis Romantsov & Moseyko , this work.

Diagnostic description. Body elongate ovate, covered with broad adpressed scales ( Fig. 1 ). Eyes large, elongate; genae short ( Fig. 6 ). Antennae filiform. Prothorax distinctly narrower than elytra, notosternal suture not evident. Elytra confusedly punctate. All tibiae dorsally finely serrate due to small spines arranged in unequal rows. Metatibiae with deep longitudinal excavation between raised outer and inner borders at apex ( Fig. 7 ).

Etymology. The name Azerberyxia is composed from part of country name Azerbaijan and generic name Eryxia .

Distribution. Azerbaijan.

Differential diagnosis. The new subgenus differs from Eryxia s. str. in having serrate tibiae, large elongate eyes and flattened wider scales, covering the body. In the region of its distribution, Azerberyxia , with a comparatively large cylindrical pubescent body, is most similar to representatives of the subgenus Falsonerissus Pic, 1951, of the genus Colasposoma Laporte, 1833 ( Fig. 3 ). But Azerberyxia is characterized, like other species of Eryxia ( Figs 1, 4 ), by having a narrow pronotum, obsolete notosternal sutures, squamose setae covering the body and hind tibiae with deep longitudinal excavation at apex ( Figs 7, 8 ); in contrast to the wide pronotum, well developed notosternal suture, fine dorsal pubescence and obliquely truncated apices of metatibiae ( Fig. 9 ) in Falsonerissus.

Figures

FIGURES 1–4. Eryxia species and Colasposoma species, dorsal view. 1, Eryxia (subgenus Azerberyxia) serratotibialis new species, holotype, male; 2, E. (Azerberyxia) serratotibialis, paratype, female; 3, Colasposoma (subgenus Falsonerissus) argentatum (Lopatin, 1981) from Iran; 4, Eryxia (subgenus Eryxia) confusa Selman, 1972 from Congo.

FIGURES 5–9. Eryxia species and Colasposoma species. 5, Eryxia (subgenus Azerberyxia) serratotibialis new species, lateral view of holotype; 6, E. serratotibialis, head of holotype; 7, E. serratotibialis, dorsolateral view of right metatibia of holotype; 8, E. (subgenus Eryxia) confusa Selman, 1972 right metatibia; 9, Colasposoma (subgenus Falsonerissus) argentatum (Lopatin, 1981) right metatibia.