Triaenodes flintorum, Holzenthal & Contents, 2004

Holzenthal, Ralph W. & Contents, Trond Andersen Table Of, 2004, The caddisfly genus Triaenodes in the Neotropics (Trichoptera: Leptoceridae), Zootaxa 511 (1), pp. 1-80 : 23

Triaenodes flintorum , new species

Fig. 13

Phenotypically, this species is very similar to T. mexicanus , the only distinctive character separating them being the rounded ( T. mexicanus ) or slightly excavated ( T. flintorum ) apex of tergum X. They are perhaps most similar in sharing the cleft apex of the phalicata. There are a number of smaller differences, but since so little material is available (one specimen of each species), it is impossible to determine whether this represent variation within a single species or not. Until more material is available for study, we prefer to assign these specimens to different species having no evidence of intermediate forms.

Adult (male: n=1). Forewing length 5.9 mm, hind wing length 4.8 mm. Eye 0.42 mm wide. Antennal scape 0.45 mm long. Maxillary palp segment lengths (in mm): 0.26, 0.39, 0.45, 0.23, 0.55. Forewing golden brown, with narrow line of cream colored hairs along anal margin.

Male genitalia. Abdominal segment IX anterior margin nearly straight, produced anteroventrally; pleural region membranous, setose; tergum IX, in dorsal view, with posteromesal margin truncate, dorsomesal papillae not evident; sternum IX in lateral view with posterior margin sinuate. Preanal appendage setose, about as long as wide, constricted basally, apex subacute. Dorsomesal process of tergum X digitate, originating basally, long, extending to apex of tergum X, with apical setae; tergum X, in dorsal view, with lateral margins subtriangular, apex slightly excavate medially; in lateral view, triangular, apex rounded, with lateral flange, apicolateral margins with microtrichia. Inferior appendage subquadrangular basally, setose, with long, tapering, apicoventral projection; recurved process gradually downturned, narrow, tapering throughout length, apex sharply attenuate; apicomesal lobe heavily setose, elongate, narrow, parallel sided. Phallobase small, triangular, endothecal membranes prominent, highly convoluted, with pair of parameres, parameres subequal, long, straight, tapering, apices more heavily sclerotized; phalicata troughlike, straight, narrow throughout length, apex cleft, phallotremal sclerite small, u­shaped.

Holotype male: MEXICO: Oaxaca: 8 km S Valle Nacional , 25.v.1981, C & O Flint ( UMSP000083658 ) ( NMNH).

Distribution. Mexico.

Etymology. We name this species in honor of Dr. Oliver S. Flint, Jr. and his wife, Carol Flint, in recognition of their discovery of this and many other new species of Neotropical caddisflies.

Figures

FIGURE 13. Triaenodes flintorum, new species. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, lateral; E—apex of phallus, dorsal.