Dinelytron leukommatos, Heleodoro & Rafael, 2020

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 : 48-50

Dinelytron leukommatos sp. nov.

Fig. 14A-C .

Examined material. Holotype _ ( Fig. 9A-C ): “ Brasil, Pernambuco, Recife , 8 0 0 57.19ʺS 34 57 0 0.53ʺW, 01.x.2014, Grossi, P. leg., fogging”. ( UFRPE).

Etymology. From the Greek leuko (white) and ommatos (eye), referring to the white compound eyes of this specimen. The coloration of the specimen is the same as when it was alive (Paschoal Grossi personal comm.).

Diagnosis. Compound eye white ( Fig. 14B, C ). All antennomeres longer than wide ( Fig. 14A, B ). Area between clypeus and labrum thin, inconspicuous ( Fig. 14C, D ). Radial vein subdivided in Radial anterior and posterior at apical third; Radial anterior short, five times shorter than Radial posterior, pointing towards costal margin; Radial posterior almost reaching apex of tegmina ( Fig. 14E ). Medial vein subdivided in Medial anterior and posterior near tegmina base; Medial anterior subdivided in Medial anterior 1 and 2 right before half tegmina length; Medial anterior 1 and 2 nearly straight; almost touching each other ( Fig. 14E ). Subgenital plate dome-like shaped ( Fig. 15B ). Vomer with oblong apex, shaped as inverted chalice ( Fig. 15C ). In dorsal view ( Fig. 16 ): basal pouch large, long, semi-ellipsoid. Dorsal left sclerite sinuous, basally widened, medially gradually narrowing. Internal sclerite Y-shaped.

Description. Coloration did not change after specimen died; general coloration whitish gray ( Fig. 14A ). Head. Frontal suture inconspicuous, forming an inconspicuous triangular light-yellow sulcus ( Fig. 14C ); coronal suture conspicuous, deep ( Fig. 14B ). Gena with conspicuous longitudinal sulcus near compound eye ( Fig. 14B ). Clypeus light yellow, four times wider than high, with basal margin concave, lateral and apical margins convex ( Fig. 14C, D ). Area between clypeus and labrum thin, inconspicuous ( Fig. 14C, D ). Labrum light yellow, symmetrical ( Fig.14C, D ). Antenna with all antennomeres longer than wide; flagellomere light brown; antennal socket white, with deep concavity ( Fig.14B, C ). Compound eye globose, white with black spots ( Fig. 14B, C ).

Thorax. Pro- and meso-notum with white spots ( Fig. 14B ). Pronotum with small rounded sulcus next to basal margin; with two parallel arched carinae in medial third and apical third; apical margin light brown with black spots ( Fig. 14A, B ). Mesonotum 1.5 times longer than pronotum, with longitudinal medial carina ( Fig. 14A, B ). Metanotum with light brown spots ( Fig. 14A ). Coxopleurite smooth, gray, with white spots. Mesothoracic epimeron subtriangular, light grey; episternum granulated, gray. Metathoracic pleural region smooth, shiny, dark grey. Thoracic sterna light yellow. Pro-, meso- and meta-basisternum with longitudinal medial light brown spot. Meso- and meta-sternum with conspicuous longitudinal medial sulcus and apical furca. Metasternum shiny.

Legs. Anterior leg dorsally and ventrally gray. Anterior femur approximately six times longer than wide, dorsally with light green spots, two parallel longitudinal carinae; ventrally smooth; anteriorly and posteriorly with small setae. Mid leg dorsally and ventrally with small setae; anteriorly light yellow; posteriorly black with light brown and white spots. Mid femur posterodorsally with nine spines. Mid tibia posteriorly with white spots at median and apical third. Posterior leg anteriorly light yellow, smooth; posteriorly gray, with light brown spots, eight spines at posterior margin.

Wings. Tegmina thin, concolor with terga, with light yellow and translucid veins, oblong apex ( Fig. 14A, E ). Radial vein subdivided in Radial anterior and posterior at apical third; Radial anterior short, five times shorter than Radial posterior, pointing towards costal margin; Radial posterior almost reaching apex of tegmina ( Fig. 14E ). Medial vein subdivided in Medial anterior and posterior near tegmina base; Medial anterior subdivided in Medial anterior 1 and 2 right before half tegmina length; Medial anterior 1 and 2 nearly straight; almost touching each other ( Fig. 14E ). Cubital vein slightly curved ( Fig. 14E ) Posterior wing with light brown veins ( Fig. 14A ).

Abdomen. Abdominal terga dark brown. Terga 1-7 longer than wide ( Fig. 14A ). Terga 3-6 gradually reducing in length ( Fig. 14A ). Tergum 7 dorsally and laterally rectangular, laterally longer than high. Tergum 8 dorsally rectangular, 1.2 times wider than long ( Fig.15A ). Terga 8-9 laterally trapezoidal, higher than long. Tergum 9 dorsally rectangular, 1.4 times wider than long ( Fig. 15A ). Tergum 10 with anterior and lateral bases deeply convex, apical margin sinuous, with two conspicuous emarginations, medially acute ( Fig. 15A ). Cercus cylindrical, lanceolate, with long setae ( Fig. 15A-C ). Abdominal sterna light yellow, with small setae, and median dark brown stripe in sterna 1-7 ( Fig. 15B ). Sterna 1-5 longer than wide. Sternum 6 rectangular,1.5 times longer than wide ( Fig. 15B ). Sternum 7 rectangular, 1.3 times wider than long ( Fig. 15B ). Sternum 8 rectangular, 1.2 times wider than long ( Fig. 15B ). Subgenital plate dome-like in shape, medio-apically slightly emarginated ( Fig. 15B ). Vomer dark brown, densely sclerotized, with oblong apex; shape of inverted chalice ( Fig. 15C ).

Genitalia. Basal pouch widened, long, semi-ellipsoid ( Fig. 16 ). Dorsal left sclerite sinuous, basally widened, gradually narrowing medially, located closely but not attached to dorsal-wall of genitalia ( Fig. 16 ). Internal sclerite Y-shaped, located at ventral lobe ( Fig. 16 ). Ventral lobe larger than dorsal lobe, with conspicuous flagellum; subdivided in upper and lower lobule; having two finger-like projections at distal most portion of lower lobule; having one bifid finger-like projection medially at upper lobule.

Measurements (mm.). Body length 32.0; dorsal head length 2.0; pronotum 2.2; mesonotum 2.9; anterior femur 8.1; anterior tibia 5.0; mid femur 4.7; mid tibia 2.4; posterior femur 9.4; posterior tibia 7.2.

Holotype condition. Anterior right leg lost. Mid and posterior leg glued to a label and pinned alongside type. Left posterior wing damaged in costal area. Left antenna broken.

Geographical record. Brazil, Pernambuco: Recife.

Remarks. Di. leukommatos sp. nov. is differentiated from all other Dinelytron species due to its white compound eye. The genitalia of Di. leukommatos sp. nov. can be differentiated from those of Di. trimaculatus sp. nov. by the shape of basal pouch, which is semiellipsoid in Di. leukommatos sp. nov. and shaped like a shield in Di. trimaculatus sp. nov.

Figures

Fig. 14. Dinelytron leukommatos sp. nov. _ holotype. A) habitus, dorsal view; B) head, antenna, and pronotum, dorsal view; C) head, frontal view; D) scheme of clypeuslabrum from figure C; E) tegmina, dorsal view.

Fig. 9. Dinelytron betinho sp. nov. _ abdominal structures. A) terga 8-10 and cercus, dorsal view; B) sterna 7-9 (subgenital plate); C) vomer and cercus, ventral view.

Fig.15. Dinelytron leukommatos sp. nov. _ holotype abdominal structures.A) terga 8-10 and cercus, dorsal view; B) sterna 5-9 (subgenital plate) and cercus, ventral view; C) vomer and cercus, ventral view.

Fig. 16. Dinelytron leukommatos sp. nov. _ genitalia. A) dorsal view; B) scheme of figure A; C) right lateral view; D) scheme of figure C.