Xiphocentron (Sphagocentron) tapanti, Vilarino & Calor, 2024

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) tapanti sp. nov.

Figures 11 A – D

Type material.

Holotype COSTA RICA • ♂; Cartago; Tapanti Reserve , quebrada palmitos and falls, 9.72 ° N, 83.78 ° W, 24–25. iii. 1991, el. 1400 m, Holzenthal, Muñoz, Huisman leg., UMSP 000143451 . — Paratypes COSTA RICA • 2 ♂; same data as holotype, UMSP 000143450 , 000143452 . • 9 ♂; same data, except 23. viii. 1990, Holzenthal and Huisman leg., UMSP 000143453 , 000143454 , 000143455 , 000143456 , 000143457 , 000143458 , 000143462 , 000143463 , 000143464 .

Diagnosis.

The new species is similar to Xiphocentron julus by the posterior margin of sternum IX with weakly produced mesal lobes. It can be differentiated from these and other species by the combination of the following characters: (1) the preanal appendage very wide subapically (narrow throughout length in X. julus ); (2) shape of paraproct in lateral view, with apicodorsal margin truncate with conspicuously narrow ventral lobe (apicodorsal margin oblique, contiguous with the ventral lobe in X. julus ); (3) tergun IX in dorsal view, posterior and anterior margins with wide deep mesal incisions.

Description.

Male: Forewing length 3.6–4.4 mm (n = 12). 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 II and IV present; fork II sessile at discoidal cell; discoidal 3 / 4 as long as thyridial cell. Hind wing forks II and V present (Fig. 11 A ). Sternum V with short, flattened projection, somewhat angular apically.

Genitalia (Fig. 11 B – E ). Tergum IX, in lateral view, wide basally, narrower apically (Fig. 11 B ); in dorsal view, anterior margin with deep concave mesal incision; posterior margin with round lobes and deep mesal incision (Fig. 11 C ). Sternum IX, in lateral view, about 3 × as long as high, apex subround; anterior apodeme wide, straight, slightly tapering (Fig. 11 B ); in ventral view, slightly longer than wide, posterior margin substraight, with shallow, narrow mesal incision forming weakly produced mesal lobes (Fig. 11 D ). Tergum X membranous fused basodorsally to each paraproct. Paraproct, in lateral view, oblong, wide at base, narrowing apically, with narrow, ventral lobe (Fig. 11 B ); in dorsal view, wide basally, divided apicomesally, each side fused at midlenght, without sclerotized mesal band, apex with several sensillae (Fig. 11 C ). Preanal appendage setose, in lateral view about 2.5 × as long as tergum IX, sigmoid, narrow at base, wide subapically, about 2 × as wide as base, tapering at apex (Fig. 11 B ); in dorsal view, substraight, tapering apically (Fig. 11 C ). Inferior appendage, in lateral view, about 2.5 × as long as tergum IX; coxopodite and harpago fused, with suture line between each article, inner face basally with long, dense spine-like setae, and row of regular setae from midlenght to apex (Fig. 11 B ); basal region (coxopodite) wide, without basomesal spine-like setae, mesal sclerite region with few difuse long spine-like setae; apical region (harpago) narrow, digitate, about as long as basal region, apex slightly enlarged, round (Fig. 11 B ); basal plate in lateral view wide, anteriorly with, narrow flange (Fig. 11 B ). Phallus tubular, very long and narrow, reaching segment V; basally conical, subapically annulate, weakly sclerotized; apex slightly enlarged (Fig. 11 E ).

Etymology.

Name in apposition; in reference to the Tapantí National Park where the species was collected.

Distribution.

Costa Rica.

Figures

Figure 11. Xiphocentron (Sphagocentron) tapanti sp. nov. Holotype (UMSP), male. A wing venation. Genitalia: B left lateral, C dorsal, D ventral, E phallus lateral. Scale bar 0.1 mm.