Toxidium distortum, Groll, 2025

Toxidium distortum sp. nov.

urn:lsid:zoobank.org:act:21F66F90-DE46-4DC0-8F72-71092A9F3DF4

Figs 1A–D View Fig , 71– 73 View Fig View Fig View Fig , 93E–F View Fig

Diagnosis

Body length: 1.88 mm. Brown. Ventral side almost glabrous. Sutural striae extending from apex to approximately 0.89 of the sutural length. Metaventrite I with few coarse punctures next to the submesocoxal lines. Metanepisternal suture sinuous. Abdominal ventrite I with micropunctures on the central region. Parameres of the aedeagus sinuous in lateral view; sclerite asymmetrical.

Etymology

The species epithet is a Latin word meaning ‘twisted’, due to the internal sac shape.

Material examined

Holotype

BRAZIL • ♂ *; Minas Gerais, Viçosa, Mata da Biologia ; 23 Nov. 2021; E. von Groll and G.L.N. Marins leg.; “/ Em Fungo branco ressupinado no tronco caído / Dissecado em 12.xi.2022 / HOLOTYPUS ♂ ”; CELC. ( Fig. 71D–E View Fig )

Description

COLOURATION. Brown; mouthparts, antennae, and tibiae yellow; anterior part of femora dark ochreous; posterior tip of femora, tibiae, elytral apex, and apex of each abdominal ventrite, ochreous ( Fig. 71A–C, F View Fig ).

HEAD. Frons with punctures moderately sparse and coarse, and with some micropunctures; pubescence moderately dense ( Fig. 71F View Fig ). Antennomere XI elongate; antennomere proportions ( Fig. 71H View Fig ): I missing: II 107/41: III 69/20: IV 90/18:V 104/18:VI 100/16:VII 121/36: VIII 90/22:IX 115/35:X 115/36: XI 157/42.

PROTHORAX. Smooth; punctures fine; pubescence moderately sparse ( Fig. 71G View Fig ). Hypomeron with punctures very fine and pubescence sparse ( Fig. 71B View Fig ). Posterior angle of pronotum somewhat acute, almost reaching anapleural line ( Fig. 71B View Fig ).

MESOTHORAX. Tip of scutellum just partially exposed ( Fig. 71G View Fig ). Mesanepisternum finely punctate; pubescence sparse ( Fig. 71B View Fig ). Mesoventral lines slightly sinuous; secondary straight ( Figs 71B View Fig , 72A View Fig ).

METATHORAX. Metaventrite smooth, shining, with few lateral pubescence; punctures inconspicuous; few coarse punctures next to submesocoxal lines ( Fig. 71B View Fig ). Submesocoxal lines partially straight laterally, and connected at midline, forming an obtuse angle; submesocoxal area length: 0.09 mm ( Fig. 71B View Fig ). Metanepisternal suture sinuous ( Fig. 72A View Fig ).

WINGS ( Figs 71A–C View Fig , 72B View Fig ). Elytra moderately dense and coarse punctate – more than pronotum. Sutural striae just slightly shortened, extending from apex to approximately 0.89 of the elytral sutural length ( Fig. 71A View Fig ). Lateral striae impunctate, slightly curved at humeral region, and reaching elytral border ( Fig. 71B View Fig ).

LEGS. With imbricate microsculpture ( Fig. 72C–D View Fig ). ABDOMEN. Central region of ventrite I and propygidium micropunctured; ventral surface almost glabrous ( Figs 71B View Fig , 72D View Fig ). Pro- and pygidium with some coarse punctures, moderately pubescent, and micropunctured ( Fig. 72E View Fig ).

Male

Protarsomeres I–III widened, bearing tenent setae ( Fig. 72C View Fig ). Sternite VIII shortened, bearing a triangular posterior projection ( Fig. 72F View Fig ). Tergite VIII with a wide posterior projection ( Fig. 72G View Fig ). Tergite IX with ventral struts almost straight ( Fig. 72H View Fig ). Sternite IX widened posteriorly ( Fig. 72I View Fig ). Tergite X triangular ( Fig. 72J View Fig ).

AEDEAGUS ( Fig. 73 View Fig ). Basal bulb longer than apical lobe; apical lobe curved, just slightly sclerotized. Parameres sinuous and with strigulate microsculptures ( Fig. 73B View Fig ); sclerite of internal sac asymmetrical ( Fig. 73D–G View Fig ).

MEASUREMENTS (n=1, holotype; in mm). TL 1.88, SY 0.24, HW 0.78, IS 0.34, WA 0.17, PL 0.82, PA 0.53, PB 1.02, EI 1.22, EL 1.36, EW 0.55, EH 0.55, MB 0.24, MC 0.11, ML 0.09, PrF 0.49, PrT 0.34, MsF 0.59, MsT 0.44, MtF 0.60, MtT 0.54.

Host

Collected from an undetermined crust fungus ( Fig. 93E–F View Fig ).

Remarks

Similar to T. ultimum sp. nov. but differs by the shorter submesocoxal area, the absence of microsculpture on ventrite I, the dilatated parameres in lateral view, and by the asymmetrical sclerite of internal sac.

Distribution

Mata da Biologia, Universidade Federal de Viçosa, campus of Viçosa, state of Minas Gerais, Southeast Brazil ( Fig. 1A–D View Fig ).