A revision of the Neotropical caddisfly genus Rhyacopsyche, with the description of 13 new species (Trichoptera: Hydroptilidae) Author Wasmund, Anne M. Author Holzenthal, Ralph W. text Zootaxa 2007 1634 1 59 journal article 10.5281/zenodo.179477 3ff8b316-c411-4d6b-af4c-e7bb7a663759 1175-5326 179477 Rhyacopsyche rhamphisa , new species Fig. 26 Resembling R. colei in the form of the dorsolateral lobe, R. rhamphisa , new species , is easily diagnosed by the narrow, hooklike inferior appendage, as well as the complex, many lobed apex of the phallus. Adult (male: n=2, female: n=1). Forewing length 2.3, 2.8 mm (male), 3.4 mm (female). Color of head dark brown, antennae light brown, legs medium brown, wings mottled light and dark brown. Sternum VII with apicomesal point. Male genitalia. Abdominal segment IX heavily setose, anterior margin deeply rounded; sternum IX, in lateral view, with posterior margin slightly rounded, with connecting membrane to inferior appendage; posterior margin slightly inflated midlaterally; dorsolateral lobe of segment IX elongate, in dorsal view rounded, deeply divided, widely separated, apex bearing several short, dark, peglike setae. Tergum X completely retracted inside segment IX. Intermediate appendage produced into small slender plate lying mesad of inferior appendage, in dorsal view, plate spatulate. Inferior appendage elongate, heavily setose, with strong apical point bearing 1 large pointed seta. Phallus linear, thin membranous sheath surrounding the middle of the phallus, apex produced into several acicular processes; central tubule with forked apex; apex of lateral process undulate. Holotype male: COLOMBIA : Valle Del Cauca: Municipio El Cerrito, Rio Cerrito 7.1 kms E. Hacienda “El Paraiso”, 03°38’59”N , 076°09’10”W , 1950 m , 3.xii.1997 , Muñoz-Quesada et al . ( UMSP 000209391) ( UMSP ). Paratypes : COLOMBIA : Valle Del Cauca: same data as holotype — 1 female ( UMSP ); COSTA RICA : Guanacaste : Parque Nacional Guanacaste, Estación Maritza, Rio Tempisquito, 10°57’29”N , 085°29’49”W , 550 m , 30–31.viii.1990 , Huisman, Blahnik, Quesada — 1 male ( UMSP ), ( UMSP 000076395): differs in that the inferior appendages are slightly more slender, and the base of the inferior appendages is only slightly more truncate. Distribution. Colombia , Costa Rica . Etymology. Rhamphis is the Greek word for hook, referring to the strongly hooked inferior appendages.