Dinelytron museunacional Heleodoro &amp; Rafael 2020, sp. nov.
Creators: name: Heleodoro, Raphael Aquino
name: Rafael, Jose Albertino
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Phasmida
Prisopodidae
Dinelytron
Dinelytron museunacional

description: <i>Dinelytron museunacional</i> <b>sp. nov.</b> Fig. 17A-B. <i>Examined material.</i> Holotype <i>_</i>: “ Parque Sooretama, Sede, Sooretama, Espírito Santo, 20.ii.1959, Martins Gomes de Amorim <i>leg</i>.” (MNRJ <b>LOST IN THE BURN</b>). Paratype <i>_</i>: “ Itatiaia, Rio de Janeiro, 10.xi.1961, na luz do lampi~ao [collected on lamp], coleta manual [manual collecting], 19-23 horas” (MNRJ <b>LOST IN THE BURN</b>). <i>Etymology</i>. The species name is dedicated to the <i>Museu Nacional do Rio de Janeiro</i> to solidarize with its burning. <i>Diagnosis</i>. Labrum asymmetrical, apically bifurcated at right half (Fig. 17B, C). Tegmina mud green with white spots; radial vein light brown, remaining veins translucid (Fig. 17A, D). Radial vein subdivided in Radial anterior and posterior at apical third; Radial anterior straight, approximately four times shorter than Radial posterior; Radial posterior straight, reaching tegmina apex (Fig. 17D). Medial bifurcated in Medial anterior and posterior at the basal third; Medial anterior bifurcated in Medial anterior 1 and 2 at approximately half the tegmina length; Medial anterior 1 straight, reaching tegmina apex; Medial anterior 2 bifurcated in Medial anterior 2-1 and 2-2, with both bifurcations straight and not reaching tegmina apex (Fig. 17D). Subgenital plate with basal margin conspicuously concave, apical margin with slight emargination medially (Fig. 18A). Vomer with deep constriction in apical third (Fig. 18B). In dorsal view (Fig. 19): basal pouch egg-shaped; dorsal left sclerite with acute apex. Internal sclerite reniform, 3.5 times shorter than basal pouch. <i>Description</i>. Head. General coloration light brown (Fig. 17A). Frontal suture conspicuous, forming an inconspicuous dark triangular yellow sulcus (Fig. 17B); coronal suture inconspicuous. Clypeus light yellow, medially with dark brown spot; basal margin medially emarginated, lateral margin convex, apical margin slightly sinuous, four times wider than high (Fig. 17B, C). Area between clypeus and labrum ellipsoid, conspicuous (Fig. 17B, C). Labrum asymmetrical, apically bifurcated at right half, laterally light yellow with dark brown spots (Fig. 17B, C). Antenna with flagellum dark brown (Fig. 17A); flagellomere 1 rectangular, longer than wide, 2.2 times longer than flagellomere 2; flagellomere 2 subtriangular; flagellomere 3 rectangular, longer than wide, 1.2 times longer than flagellomere 2. Compound eye globose, light brown with dark brown spots (Fig. 17A, B). Thorax. General coloration light brown (Fig. 17A). Pronotum with two longitudinal parallel-arched sulci; posterior margin with horizontal black spot (Fig. 17A). Mesonotum 1.6 times longer than pronotum, with conspicuous longitudinal medial carina (Fig. 17A). Coxopleurite smooth, concolor with pronotum. Mesothoracic epimeron subtriangular, with straight margins, rugose, concolor with pronotum. Mesothoracic episternum idem with epimeron. Metapleural region dark brown smooth, shiny. Thoracic sterna dark brown, smooth. Mesobasisternum with medial circular sclerite concolor with sterna. Legs. All legs: dorsally and ventrally light brown; anteriorly and posteriorly covered by setae. Anterior femur dorsally rugose, with dark brown spots, longitudinal medial carina; ventrally with small setae. Mid leg dorso-posteriorly with three rhomboid projections. Posterior femur with anterior and posterior margins straight. Wings. Tegmina mud green with white spots; radial vein light brown, remaining veins translucid (Fig. 17A, D). Radial vein subdivided in Radial anterior and posterior at apical third; Radial anterior straight, approximately four times shorter than Radial posterior; Radial posterior straight, reaching tegmina apex (Fig. 17D). Medial bifurcated in Medial anterior and posterior at the basal third; Medial anterior bifurcated in Medial anterior 1 and 2 at approximately half the tegmina length; Medial anterior 1 straight, reaching tegmina apex; Medial anterior 2 bifurcated in Medial anterior 2-1 and 2-2, with both bifurcations straight and not reaching tegmina apex (Fig. 17D). Cubital vein long, straight (Fig. 17D) Posterior wing with veins light yellow. Abdomen. Abdominal terga dark brown, opaque (Fig.17A). Terga 1-6 dorsally rectangular, longer than wide with conspicuous longitudinal carina (Fig. 17A). Tergum 7 dorsally rectangular, longer than wide, with longitudinal medial carina. Tergum 8 dorsally trapezoidal, as long as wide, 1.4 times longer than Tergum 9. Tergum 9 rectangular, approximately 1.2 times wider than tergum 10. Tergum 10 with straight base, arched, and convex lateral and apical margin; 1.5 times shorter than tergum 9. Cercus cylindrical, with small setae, and oblong apex (Fig. 18B). Sterna 1-7 rectangular, longer than wide, gradually shortening in length. Sternum 7 rectangular, 1.3 times longer than wide, with basal and apical margin slightly convex; lateral margin straight (18A). Sternum 8 rectangular, 1.8 times wider than long, with slightly concave basal margin; lateral margin convex; apical margin conspicuously concave (Fig. 18A). Subgenital plate with basal margin conspicuously concave, apical margin medially with slight emargination (Fig.18A). Vomer dark brown, with deep constriction at apical third, apically acute (Fig. 18B). Genitalia (Fig. 19). Basal pouch egg-shaped in dorsal view. Dorsal left sclerite with acute apex. Internal sclerite reniform, 3.5 times shorter than basal pouch. Ventral lobe having small scattered spines. Flagellum present. <i>Measurements</i>. Body length 37.2-38.4; dorsal head length 2.5-2.7; pronotum 2.4-2.8; mesonotum 2.7-2.8; anterior femur 7.4-7.5; anterior tibia 5.5-5.8 mid femur 5.3; mid tibia 5.0-5.1; posterior femur 9.9; posterior tibia 7.0-7.2. <i>Type condition</i>. All lost in September 2018 burning of the MNRJ. <i>Geographical records</i>. Brazil, <i>Espírito Santo</i>: Sooretama; <i>Rio de Janeiro</i>: Itatiaia. <i>Remarks</i>. <i>Di. museunacional</i> <b>sp. nov.</b> has the longest body of the <i>Dinelytron</i> species. It is morphologically similar to <i>Di. ramusculus</i> <b>sp. nov.</b> but it can be differentiated by the subgenital plate, which is concave at the basal margin (<i>versus</i> convex in <i>Di. ramusculus</i> <b>sp. nov.</b>). It is the only species with a bifurcation in the right side of the labrum, which is present in both holotype and paratype, which come from different populations. Therefore, the possibility of this character being a populational abnormality is excluded.
description: Published as part of <i>Heleodoro, Raphael Aquino &amp; 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, pp. 37-80 in Zoologischer Anzeiger 285</i> on pages 50-52, DOI: 10.1016/j.jcz.2020.01.005, http://zenodo.org/record/3711292