Wormaldia noveloi Razo-González, 2018

Razo-González, María, 2018, Caddisflies (Insecta: Trichoptera) from Santa Catarina Lachatao, Oaxaca, México: New species, new geographical records, and checklist, Zootaxa 4388 (1) : -

Wormaldia noveloi Razo-González , n. sp.

( Figs. 2A–2E )

Diagnosis. According to the species group proposal by Ross (1956), Wormaldia noveloi n. sp. belongs to the Wormaldia arizonensis Group, closely related to W. dorsata Ross & King (in Ross 1956) , W. fredycarol Muñoz- Quesada & Holzenthal 2015, W. isela Muñoz-Quesada & Holzenthal 2015 , W. luma Bueno-Soria & Holzenthal 1986 , W. maesi Muñoz-Quesada & Holzenthal 2015 , and W. palma Flint 1991 . Species of this Group are distinguished from the other known species of Wormaldia by the presence of a semicircular dorsal pouch beneath the apex of tergum VIII ( Figs. 2A, 2B ), the hooked projection anterodorsally on segment IX (best seen laterally), and the stout and subtriangular tergum X in dorsal view without process “ a ” and with its “head” rounded posteriorly and without lateral apices ( Fig. 2B ); when viewed laterally, the “head” is tubular, narrow, and apically rounded ( Fig. 2A ). Wormaldia noveloi n. sp. has a posteromesal projection of tergum VIII, those of the other species in the Group each have a concave posteromesal emargination. The superior appendages of W. noveloi n. sp. are tubular and almost the same length as X, whereas in the other species they are more slender and sometimes shorter. Wormaldia noveloi n. sp., unlike W. dorsata and W. maesi , has processes “ b ”, and the processes “ b ” in W. noveloi n. sp. are conspicuous, more prominent than in W. fredycarol , W. isela , W. luma , and W. palma , and covered with many setae.

Adult. Length of each male forewing 7–8 mm (n = 17). Head dark brown (coloration in alcohol). Antennae long, slender, with banded pattern brownish and yellowish and with small, brownish setae. Maxillary and labial palps light brown, with brownish setae. Dorsum of thorax dark brown. Legs light brown, with small, yellowish setae. Wings brownish, covered with fine, small, brown setae.

Male. Sternum VII straight posteriorly without projection or process. Posterior margin of tergum VIII ( Figs. 2A, 2B ) with noticeable subrectangular projection with apical and lateral margins almost straight; conspicuous, semiovate, subdorsal pouch projected anterad beneath this tergum; when viewed laterally ( Fig. 2A ), posterodorsal corner produced posterad. Sternum VIII with posterior margin straight. Segment IX, in dorsal view, with anterior margin convex ( Fig. 2B , dashed line with more-widely spaced dashes) and bearing small, ovate, mesal enlargement recurved and convex posteriorly ( Fig. 2B , arrow); in lateral view, longitudinally long, pentagonal, with slender, hook-shaped projection anterodorsally and with tall, rounded anterolateral projection on each side, concave posteriorly; when viewed ventrally, deeply concave anteriorly, with smaller mesal concavity in posterior margin. Segment X, in dorsal view, subtriangular, elongate, narrowed, and blunt posteriorly; with process “ a ” absent and processes “ b ” present; when viewed laterally, “head” tubular, narrow, and rounded. Superior appendages digitate; when viewed dorsally, parallel with segment X, slender, approximately same thickness to blunt apex; in lateral view, elongate, suboval, slightly shorter than segment X. Inferior appendages each two-segmented; in lateral view, basal segment stout, subrectangular, elongate, broadest and ventrally convex at midlength; apical segment slender, rectangular, tubular, slightly longer than basal segment, narrower than basal segment, rounded apically; in dorsal view, apical segment as in ventral view ( Fig. 2C ); when viewed ventrally, basal segments united for about twothirds of their length, separated posteromesally by U-shaped emargination, each basal segment stout, slightly widest at midlength, with outer margin convex and curved anteromesad basally, apical segment nearly tubular, elongate, rounded apically, with fine, black, spine-like setae in elongate, subapicomesal patch. Phallus, in lateral view ( Fig. 2D ), widest basally, tapering from middle to apex, membranous apically and very lightly sclerotized; with many visible internal sclerites ( Fig. 2E ).

Holotype male. MÉXICO: Oaxaca: Santa Catarina Lachatao, Puente de los Trabajos, 17°15’11”N, 96°29’27”W, 1985 m asl, 24.v.2013, light trap, V.S. Jiménez-Hernández, M.E. López-Martínez, E. Ruiz-Jiménez, J.A. Casasola-González & M. Razo-González, 1 male (alcohol, CNIN-IBUNAM).

Paratypes. MÉXICO : Oaxaca : Santiago Comaltepec, Cascadas de Comaltepec stream, 17°35’15”N, 96°29’35”W, 2432 m asl, 8.ii.2016, entomological net, R. Novelo-Gutiérrez, J.A. Gómez-Anaya & M. Razo- González, 1 male (alcohol, CNIN-IBUNAM) ; same data except 30.x.2016, light trap, R. Novelo-Gutiérrez, J.A. Gómez-Anaya & M. Razo-González, 16 males (alcohol, CNIN-IBUNAM).

Etymology. This species is dedicated to Dr. Rodolfo Novelo-Gutiérrez, as a gesture of gratitude for his valuable friendship, cooperation, and encouragement during my doctoral studies.

Distribution. MÉXICO: Oaxaca.

Taxonomic remarks. Intraspecific variation can be seen in males in the shape of the posterior margin of tergum VIII which can be straight to slightly concave.

Figures

FIGURE 2. Wormaldia noveloi new species, male genitalia. 2A, left lateral; 2B, dorsal; 2C, ventral; 2D, phallus, left lateral; 2E, phallic sclerite, dorsal. VIII = segment VIII; IX = segment IX; X = segment X; sa = superior appendage; ia = inferior appendage; ps = phallic sclerite.