Dinelytron agrion Westwood, 1859

Heleodoro, Raphael Aquino & Rafael, Jose Albertino, 2020, Review of the genus Dinelytron Gray (Prisopodidae: Prisopodinae: Prisopodini), with a phylogenetic analysis of the genera of the Prisopodini, including the description of a new genus, Zoologischer Anzeiger 285, pp. 37-80 : 43-44

Dinelytron agrion Westwood, 1859 .

Dinelytron agrion Westwood, 1859: 6 ; Kirby 1904: 408 (commentaries on holotype); Redtenbacher 1906: 150 (redescription); Rafael & Heleodoro, 2017 (Brazilian catalog); Brock et al. 2019 (world catalog).

Examined material. Holotype _ ( Fig. 4A ) (examined by photo): “BM [British Museum], agrion, westw. [ood], Vila Nova [ Amazonas , Tapajos river ], Bates [collector], Dinelytron ? Agrion , Westw., Amazon , Villa Nova ” ( NHM).

Ordinary material: “ Brasil, Manaus, Res. Ducke, 01.xii.2013, E. Aluim col.” (1 _ INPA ).

Description of genitalia (_). Mainly membranous, with dorsal and ventral lobe continuously connected. Dorsal lobe having small rigid spiny sensilla; left, median and right posterior processes conspicuously present; with conspicuous sclerotization, heavily pigmented at left median margin ( Fig. 7A, C, E ) Median posterior process with several small spikes ( Fig. 7E ). Dorsal left sclerite slender, tubuliform, slightly curved; completely internal and close to dorsal-most wall of the genitalia; cleft between ducts conspicuous ( Fig. 7A ). Basal pouch bifurcated, resembling a “U”, pointed latero-posteriorly, external to genitalia ( Fig. 7A, B ). Sclerotized tube of ejaculatory duct present, with triangular base, positioned next to dorsal left sclerite, seeming connected ( Fig. 7C ). Internal sclerite present, “C” shaped, positioned under basal pouch ( Fig. 7D ). Ventral lobe with lower and upper lobule, having several small scattered sensilla. Having small bifurcated digitiform projection medially at upper lobule.

Holotype condition. Mid left and right posterior legs missing. Right posterior wing basally broken in anal area.

Geographical records. Brazil, Amazonas: Manaus.

Remarks. Westwood (1859) described this species uncertain of its placement in Dinelytron . Kirby (1904) had the same doubt when examining the holotype, but confirmed that D. agrion was related to Prisopodidae . As our results demonstrate, this species belongs without a doubt to Paraprisopodini , due to the short tegmina and convex venter. Furthermore, the male genitalia do not fit in the pattern of any Prisopodini genus. Despite all these evidences, this species is not going to be transferred to another tribe or genus in the present work to respect the unpublished work of Oskar Conle (pers. comm., unpublished results), whom reached this conclusion previously. Thus, in the present work, Di. agrion is still treated as Dinelytron and to highlight this decision the name of the species is displayed between quotation marks in the phylogeny results. This is the first time the genitalia of this species are described.

Figures

Fig. 4. Male genitalia of Dinelytron betinho sp. nov. _ holotype attached to subgenital plate. A) dorsal view; B) right dorsolateral view; C) right lateral view; D) left lateral view.

Fig. 7. Male genitalia of Dinelytron agrion. A) dorsal view; B) scheme of figure A; C) lateral view; D) basal pouch and internal sclerite, lateral view; E) dorsal lobe, apex of dorsal left sclerite and left posterior process, dorsal view. Note: although this species is confirmed to belong to another genus, it is not going to be transferred from Dinelytron in the present work. Check the species section for further explanation.