Browsing by Author "Hamilton, Steven W."

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    Five new species of Polycentropodidae (Trichoptera) from Ecuador and Venezuela
    (Magnolia Press, 2005) Hamilton, Steven W.; Holzenthal, Ralph W.
    Diagnoses, descriptions and illustrations of male genitalia are given for four new species of the Polycentropus gertschi group, Polycentropus cressae n. sp., Polycentropus neblinensis n. sp., Polycentropus quadricuspidis n. sp., and Polycentropus silex n. sp. The former two are from Venezuela and the latter two from Ecuador. In addition, a diagnosis, description and set of male genitalia illustrations are provided for Polyplectropus beccus, a new species from Ecuador. The generic placement of this species, while currently appropriate, may require reclassification pending completion of ongoing studies on Neotropical polycentropodids.
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    New species and records of Costa Rican Polycentropus (Trichoptera: Polycentropodidae)
    (New York Entomological Society, 1988) Holzenthal, Ralph W.; Hamilton, Steven W.
    Five new species of Pofycentropus (Trichoptera: Polycentropodidae) from Costa Rica are described and illustrated: P. fasthi, P. fortispinus, P. nebulosus, P. volcanus, and P. zurqui. In addition, P. digitus Yamamoto, P. fortunus Flint, and P. mayanus Flint are recorded from Costa Rica for the first time. Also, P. acanthogaster Flint, P. altmani Yamamoto, P.costaricensis Flint, P. dentoides Yamamoto, P. lingulatus Flint, and P. spicatus Yamamoto occur or are likely to occur in the country.
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    Twenty-four new species of Polycentropus (Trichoptera, Polycentropodidae) from Brazil
    (Pensoft Publishers, 2011) Hamilton, Steven W.; Holzenthal, Ralph W.
    Twenty-four new species of the caddisfl y genus Polycentropus (Insecta: Trichoptera: Polycentropodidae) occurring in Brazil are diagnosed, described, and the male genitalia of each are illustrated. Eighteen of the new species are placed in the Polycentropus jorgenseni species complex of the Polycentropus gertschi group of New World Polycentropus sensu lato. Furthermore, 6 new species within the P. gertschi group (P. ancistrus sp. n., P. boraceia sp. n., P. carioca sp. n., P. froehlichi sp. n., P. galharada sp. n., and P. graciosa sp. n.) are placed in an informal diagnostic cluster of species with P. urubici Holzenthal & Almeida. Ten of the other P. gertschi group species form a second cluster of diagnostically similar species, the Polycentropus soniae cluster (P. caaete sp. n., P. carolae sp. n., P. cheliceratus sp. n., P. fl uminensis sp. n., P. itatiaia sp. n., P. minero sp. n., P. santateresae sp. n., P. soniae sp. n., P. tripui sp. n., and P. virginiae sp. n.). Two of the remaining 8 new species are included in the P. jorgenseni species complex (P. cipoensis sp. n. and P. verruculus sp. n.), while the remaining 6 are unique and cannot be placed in one of the groups at this time (P. acinaciformis sp. n., P. amphirhamphus sp. n., P. cachoeira sp. n., P. inusitatus sp. n., P. paprockii sp. n. and P. rosalysae sp. n.).