Henryvianaida Guidoti et al., 2020

Henryvianaida Guidoti et al. , gen. nov.

lsid: urn:lsid:zoobank.org:act:9B302C57-62DF-45DB-8BB7-388155AA5787

Diagnosis: This genus can be easily identified by the constricted mandibular plates, which is unique among the known extant vianaidines. There are only macropterous forms known for this genus but the presence of an anteriorly expanded paranota, the large scutellum, the constriction on the anterior part of the hemelytra, the narrow subcostal area less than half of the width of the discoidal area in its widest part, and the scent gland peritreme clearly Y-shaped and not laterally expanded appears to be diagnostic characters for the genus and possibly not affected by the possible and perhaps expected wing polymorphism.

Description: Head: Triangular in dorsal view, pubescent, with hairs on vertex; mandibular plates constricted; pedicel three times the length of scape, other segments missing; eyes fully developed, compound; bucculae posterior border straight; rostrum reaching abdomen. Thorax: Posterior lobe raised, barely punctate on most of its extant, but strongly punctate near posterior border; collar somehow distinct, punctate; anterior border convex, passing posterior edge of the eyes; posterior border usually convex; paranota explanate, smooth, expanded anteriorly. Hemelytra: Macropterous, clavus and vein-less membrane well-defined; constricted anteriorly; punctate on coriaceous parts; subcostal area subvertical; costal vein not noticeable; costal area explanate, punctate; hypocosta broad and finely punctate. Scent gland: Anterior branch not laterally projected, strongly inclined forward; posterior branch usually straight; evaporatorium barely projected on mesopleuron, occupying a slightly curved and inclined area. Legs: Femora swollen; tarsi two segment, second segment many times the length of the first. Abdomen: Rectangular, covered with hairs; spiracles located ventrally near lateral margins of abdominal sternites, these straight.

Etymology: This genus was named after our good friend and American entomologist, Dr Thomas J. Henry. Dr Henry helped the leading author with his PhD by serving as a member on the annual evaluation committee and as his sponsor on a predoctoral fellowship awarded by the Smithsonian Institution. Besides this close relationship with this project, Dr Henry has a productive career, contributing greatly on the study of Heteroptera and specially Miridae . His enthusiasm and passion are extremely contagious and left a good mark on the leading author after this year working side-by-side at the NMNH. The ending is based on Vianaida , the type genus of the family.

Type species: Henryvianaida colombiensi s sp. nov.

Distribution: Known from Colombia and Peru ( Fig. 18B View Figure 18 ).

Discussion: Henryvianaida is proposed here based on two macropterous singletons, both described as new species in this contribution. The difference in size of these two species is unique among Vianaidinae genera to this date. The genus presents at least one unique feature among all known extant species of Vianaidinae , which is the constricted mandibular plate. The general habitus of both species resembles A. bolivianus , but it is impossible to compare the newly described taxa with this species due to its holotype situation. However, features like the presence of an anteriorly explanate paranota, a subhorizontal subcostal area and an anterior branch of peritreme more inclined forward, together with the aforementioned constricted mandibular plates, put these two species apart from this macropterous species of Anommatocoris . Following the results of our analysis, these two species are here proposed as a new genus.