Polyplectropus anchorus, Vilarino, Albane & Calor, Adolfo R., 2015

Vilarino, Albane & Calor, Adolfo R., 2015, New species of Polycentropodidae (Trichoptera: Annulipalpia) from Northeast Region, Brazil, Zootaxa 4007 (1), pp. 113-120 : 116

Polyplectropus anchorus new species

Fig. 2 A–F

Diagnosis. This species is very similar to Polyplectropus annulicornis Ulmer 1905 . The new species can be distinguished from P. annulicornis by a mesoventral branch of the inferior appendage with its apex acute, upturned (rounded in P. annulicornis ), without a medial projection (present in P. annulicornis ), and by the endothecal spines without setae and with their apices directed dorsolaterad (whereas setae and apices are directed ventromesad in P. annulicornis ).

Description. Male. Length of forewing 4.3–4.9 mm, n=8. Color (in alcohol) of head, thorax, and legs brown; wings lightly pigmented on M bifurcation, on transversal veins r-m, m, and m-cu and on Cu1 bifurcation with the lightly pigmented region extending until the end of A1.

Genitalia. Sternum IX in lateral view deltoid, anterior margin submedially produced, posterior margin entire; in ventral view subrectangular, anterior margin concave, posterior margin convex. Terga IX+X membranous, oblong, bearing dorsal microsetae. Intermediate appendage not longer than inferior appendage, digitate, with apical setae; in dorsal view digitate, apex narrowing and directed laterad; in caudal view digitate, curved, directed ventrolaterad. Preanal appendage tripartite, with dorsolateral, mesolateral, and mesoventral processes; dorsolateral process elongate, originating from dorsum of mesolateral process, directed anterodorsad, then recurved posterad, tapering posteromesally into acute apex, slightly expanded subapically; mesolateral process setose, in dorsal view oblong, in lateral view deltoid; mesoventral process setose, in lateral view hook-like, dorsally produced into deltoid lobe, with ventrad-directed sclerotized ventral apex, ventral margin sinuate, bearing setae, posterior margin truncate; in caudal view, mesoventral processes separated, with dorsal digitate lobe and with ventral margin acute. Inferior appendage bipartite, with dorsolateral branch and mesoventral branch, and with anterior basal plate extending anterad about half length of sternum IX, basal plate anteriorly bilobed in ventral aspect; dorsolateral branch setose, in lateral view oblong, apex truncate; in ventral view broad, lateral margin subapically produced, undulate, posterior margin undulate, mesal margin slightly undulate, apically rounded to subtruncate, basally expanding posterad into mesoventral branch; mesoventral branch setose, elongate, bearing stout setae basally, in lateral view digitate, narrowing distally, apex upturned, acute; in ventral view digitate, posteromesal margin entire, gradually diverging laterad. Phallus long; dorsal phallic sclerite in lateral view sinuate, apex oblong; apex of dorsal phallic sclerite in dorsal view rounded; endothecal membrane with 2 stout, medium-sized, sclerotized spines, with their apices directed dorsolaterad.

Holotype male (alcohol) ( MZUSP): BRAZIL: Bahia: Varzedo, Fazenda Baixa Grande, Riacho Cai Camarão, 12º57’38.7’’S, 39º26’54.2’’W, el. 254 m, 24.x.2012, UV light pan trap, Gomes V., Campos R.

Paratypes: BRAZIL: Bahia: same data as holotype, 5 males (alcohol) ( UFBA, UMSP); Elísio Medrado, Reserva Jequitibá, GAMBA, Córrego Caranguejo, 12º52’12.7’’S, 39º28’32.4’’W, el. 510 m, 22.x.2012, UV light pan trap, Gomes V., Vilarino A., Campos R., 2 males (alcohol) ( UFBA).

Etymology. The species epithet is from the Latin adjective anchorus , anchored, or having the nature of an anchor, in reference to the endothecal spines that in dorsal view resemble a boat anchor.

Remarks. Belonging to the Polyplectropus annulicornis Species Group as defined by Chamorro & Holzenthal (2010), this species seems to be a mix of P. annulicornis (preanal appendage and intermediate appendage very similar) and P. alatespinus Chamorro & Holzenthal 2010 (inferior appendage very similar).

Figures

FIGURE 2. Polyplectropus anchorus n. sp. male genitalia: A, left lateral; B, dorsal; C, phallus, dorsal; D, phallus, left lateral; E, caudal; F, ventral (Abbreviations: inf. app. = inferior appendage; int. app. = intermediate appendage; p. pr. app. = process of preanal appendage).