Cnodocentron (Caenocentron) lausus, Schmid, 1982: 44

Vilarino, Albane, Dias, Everton Santos & Bispo, Pitágoras Da Conceição, 2022, Phylogeny indicates polyphyly in Cnodocentron (Trichoptera: Xiphocentronidae): biogeography and revision of New World species (Caenocentron), Zoological Journal of the Linnean Society 194 (4), pp. 1341-1373 : 1364-1365

Cnodocentron (Caenocentron) lausus, Schmid, 1982: 44 .

Type material: Holotype. NICARAGUA: Chontales: 4.2 miles W. of Villa Somoza , 29.vii.1967, O. S. Flint leg., (♂ pinned, USNMENT01028603).

Type locality: Nicaragua, 4.2 miles west of Villa Somoza; USNM; ♂. – Maes & Flint, 1988: 3 [distribution]. – Maes, 1999: 1188 [checklist]. – Chamorro-Lacayo et al., 2007: 47 [checklist]. – Holzenthal & Calor, 2017: 454 [catalogue].

Diagnosis: Caenocentron lausus can be differentiated from its congeners by presenting the conjucntion of the following characters: coxopodite with broad apical projection bearing an apicoventral point; ventral projection without a pair of stout spines; and harpago basal third enlarged and with a linear setal brush.

Adult: Forewing length 2.5 mm (N = 1♂). Colour (pinned) dark with three short white vertical bars: near the basal third of wing, at the end of cubital vein, and at pterostigma. Maxillary palp formula (I-II-III)- IV-V; segment IV shorter than sum of segments I-II- III; male tibial spurs 2-4-3, male hindleg apical spur unmodified. Venation: forewing fork II and IV present, three anal veins present; hindwing fork II and V present, transverse vein between R1 and SR present. Abdominal sternum V with anterolateral oval region with cuticle modified and reticulate .

Male genitalia ( Fig. 18A, B ): Tergum IX, in lateral view narrow, height greater than length. Sternum IX, in lateral view, subquadrate, about as high as long, anterior margin truncate, with narrow and elongate apodeme, apical margin subtruncate, dorsal margin prominent; in ventral view, apical margin concave. Segment X membranous, fused to paraproct. Paraproct in lateral view, trapezoidal, dorsal margin sclerotized, with subapical short process ventroapically acute. Pre-anal appendage, in lateral view, strongly sinuous, slender, slightly enlarged apically. Inferior appendage coxopodite and hapago distinct. Coxopodite, in lateral view, median region with rugose area; apical margin produced oblong, subtruncate, with small ventroapical spine; basal surface with ventral projection. Ventral projection with rows of setae mesally and along its margin, apical setae longer; in ventral view ventral projection with lateral setae longer, mesal setae shorter. Harpago, in lateral view, slender, basal third enlarged, bearing short spine and linear basal setal brush. Basal plate, in lateral view, directed ventrad; in ventral view short. Phallus tubular, long and slender, base flared, reaching segment V; apex slightly enlarged.

Distribution: Nicaragua.

Figures

Figure 18. Caenocentron lausus, male genitalia: A, lateral; B, ventral.