Xiphocentron (Sphagocentron) evandrus Schmid, 1982

Vilarino, Albane & Calor, Adolfo R., 2024, Comparative geometric morphometrics of male genitalia in Xiphocentron subgenera (Trichoptera: Xiphocentronidae): new species, revision and phylogenetic systematics of the subgenus Sphagocentron, Arthropod Systematics & amp; Phylogeny 82, pp. 407-431 : 407-431

Xiphocentron (Sphagocentron) evandrus Schmid, 1982

Figures 8 A – D

Schmid 1982: 56 [Type locality: Costa Rica, Juan Vinas, Chiz river; USNM; ♂]. — Holzenthal 1988 c: 58 [distribution]. — Armitage et al. 2015 a: 3 [distribution]. — Armitage et al. 2015 b: 5 [checklist]. — Armitage and Cornejo 2015: 193 [checklist]. — Harris and Armitage 2019: 7 [distribution]

Material examined.

COSTA RICA • ♂; Juan Vinas, Chiz river , 21. vi. 1967, Flint and Ortiz leg., USNM . • ♂; Alajuela, Río La Vieja, nr. Lagarto , 2-3. vii. 1967, Flint and Ortiz leg., USNM .

Diagnosis.

Xiphocentron evandrus can be differentiated by the combination of preanal appendage subapically wide, sternum IX posterior margin produced, overall deltoid, with shallow apical incision forming very small lobes; tergum IX with very deep, narrow, parallel sided mesal incision.

Synopsis.

Adult male. Forewing length 4-4.25 mm (n = 2). Color overall brown, forewing uniformly dark brown. Maxillary palp segment length formula (I = II = III) <IV <V. Tibial spur formula 2: 4: 3; spurs unmodified. Forewing forks I, II and IV present; fork I petiolated, fork II sessile at discoidal cell; discoidal cell half as long as thyridial cell (Fig. 8 A ). Hind wing forks II and V present. Sternum V with anterolateral reticulated region.

Genitalia (Fig. 8 B – D ). Tergum IX, in lateral view, wide basally, narrower apically (Fig. 8 B ); in dorsal view posterior margin forming two dorsal lobes in quarter circle shaped and large lateral flanges (Fig. 8 C ). Sternum IX, in lateral view, about 3 × as long as high, apex narrow, anterior apodeme short, truncate (Fig. 8 B ); in ventral view, greatly enlarged at middle length, then greatly narrowed towards posterior margin, posterior margin with two very small lobes (Fig. 8 D ). Paraproct, in lateral view, with apex oblique (Fig. 8 B ); in dorsal view, apex round, ending in three equal lobes (Fig. 8 C ). Preanal appendage, in lateral view, wide, strongly thickened subapically then tapering into long triangular pointed apex (Fig. 8 B ). Inferior appendage, in lateral view, about 2 × as long as tergum IX, coxopodite and harpago completely fused to each article, inner face with longitudinal area of dense, long spine-like setae, and row of regular setae from midlenght to apex (Fig. 8 B ); basal region (coxopodite) wide, mesal sclerite region indistinct (Fig. 8 B ); apical region (harpago) narrow, digitate, 3 × as long as basal region, strongly curved (Fig. 8 B ); in dorsal view, strongly sinuous (Fig. 8 C ). Phallus tubular, very long and narrow, reaching segment V, basally conical, subapically annulate, weakly sclerotized, apex enlarged.

Distribution.

Costa Rica, Panama.

Remarks.

Type was fixed in a permanent slide and displayed in a dorso-lateral view.

Figures

Figure 8. Xiphocentron (Sphagocentron) evandrus Schmid, 1982, holotype, male (USNM). A forewing venation. Genitalia: B left lateral, C dorsal, D ventral. Modified from Schmid (1982). Small dots are inferred based on other species.