Rhyacopsyche yatay Angrisano

Wasmund, Anne M. & Holzenthal, Ralph W., 2007, A revision of the Neotropical caddisfly genus Rhyacopsyche, with the description of 13 new species (Trichoptera: Hydroptilidae), Zootaxa 1634, pp. 1-59 : 21-22

Rhyacopsyche yatay Angrisano

Fig. 30

Rhyacopsyche yatay Angrisano, 1989:157 [Type locality: Argentina, Entre Rios, Parque Nacional el Palmar; MACN; male; female]. — Angrisano, 2002:395 [larva].

This species is very unique, although it shares the reduced dorsolateral lobe with R. patalusa , and the trilobate apex of the inferior appendage with R. duplicispina . This species is easily diagnosed by the form of the 3 large spatulate lobes of the inferior appendage. The outer lobe is sclerotized, the middle lobe bears several peglike setae, and the inside lobe has several long setae.

Adult (male n=0, female n=0). Color in alcohol, dark brown.

Male genitalia. Abdominal segment IX with no apparent setae, anterior margin nearly straight, produced anteroventrally; sternum IX, in lateral view, with posterior margin slightly rounded, with connecting membrane to inferior appendage; posterior margin nearly straight; dorsolateral lobe of segment IX not evident, dorsal lobes meeting along medial line, but not fused. Tergum X completely retracted inside segment IX. Intermediate appendage produced into small slender plate lying mesad of inferior appendage, in ventral view, plate semiconical, lying between pair of membranous lobes. Inferior appendage elongate, trilobate, the outermost lobe sclerotized, lanceolate, the middle lobe spatulate, bearing several short, dark, peglike setae, the inside lobe clavate, bearing several long setae. Phallus base inflated, membranous sheath absent; central tubule with rounded apex, apex of lateral process lanceolate.

Material examined. Attempts to obtain loan material were unsuccessful. Therefore, the illustrations are after the description by E. B. Angrisano (1989).

Distribution. Argentina.

Figures

FIGURE 30. Rhyacopsyche yatay Angrisano. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, ventral. Illustration after Angrisano 1989.