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Published: 2020-03-24

A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae)

Laboratório de Sistemática de Insetos—LabSIN, Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Estado do Rio de Janeiro—UNIRIO. Av. Pasteur 458, sala 309A, 22290-240, Urca, Rio de Janeiro—RJ, Brazil.
Trichoptera aquatic insects caddisflies taxonomy Serra do Aracá


The microcaddisfly genus Acostatrichia Mosely (Leucotrichiinae, Leucotrichiini) is revised. Based on morphological features of the adult male, species assigned to the genus are here divided into three species groups: A. plaumanni Group, A. brevipenis Group, and A. cerna Group. After examination of type specimens, the subjective synonymy of Acostatrichia darda Oláh & Flint, A. hosulaba Oláh & Flint, and A. pika Oláh & Flint is proposed, with the first name being chosen to have priority over the other two. Acostatrichia ketvilla Oláh & Flint is considered a junior synonym of Costatrichia nelsonferreirai Santos & Nessimian, and another 3 species are removed from Acostatrichia: A. tapada Oláh & Flint and A. rovidka Oláh & Flint are transferred to Costatrichia; and A. topora Oláh & Flint is transferred to Leucotrichia Mosely. A new species, Acostatrichia araca sp. nov. is described and illustrated from northern Brazil; descriptions and illustrations are also provided for the other 11 Acostatrichia species. After these nomenclatural acts, the genus Acostatrichia includes 15 species restricted to South America.



  1. Angrisano, E.B. (1995) Contribución al conocimiento de los Trichoptera del Uruguay. II. Familia Hydroptilidae. Revista Brasileira de Entomologia, 39 (3), 501–516.

    Angrisano, E.B. & Sganga, J.V. (2010) Preimaginal stages of Acostatrichia simulans Mosely 1939, a Neotropical microcaddisfly (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa, 2480 (1), 54–60.

    Bowles, D.E., Harris, S.C. & Bueno-Soria, J. (1999) An assessment of New World Stacobiini (Trichoptera: Hydroptilidae: Hydroptilinae) larvae with new larval descriptions of Alisotrichia, Mejicanotrichia, and Scelobotrichia. In: Malicky, H. & Chantaramongkol, P. (Eds.), Proceedings of the 9th International Symposium on Trichoptera. Faculty of Science, Chiang Mai University, Chiang Mai, pp. 43–52.

    Dallwitz, M.J., Paine, T.A. & Zurcher, E.J. (1999) User’s guide to the DELTA Editor. Available from: (accessed 17 January 2020)

    Flint, O.S.Jr. (1970) Studies of Neotropical caddisflies, X: Leucotrichia and related genera from North and Central America (Trichoptera: Hydroptilidae). Smithsonian Contributions to Zoology, 60, 1–64.

    Flint, O.S.Jr. (1974) The Trichoptera of Surinam. Studies of Neotropical caddisflies, XV. Studies on the Fauna of Suriname and other Guyanas, 14, 1–151.

    Flint, O.S.Jr. (1983) Studies of Neotropical caddisflies, XXXIII: New species from austral South America (Trichoptera). Smithsonian Contributions to Zoology, 377, 1–100.

    Flint, O.S.Jr. (1992) Studies of Neotropical caddisflies, XLIV: on a collection from Ilha de Maraca, Brazil. Acta Amazonica, 21 (1991), 63–83.

    Guahyba, R.R. (1991) Estágios imaturos de Anchitrichia duplifurcata Flint, 1983 (Trichoptera, Hydroptilidae). Revista Brasileira de Entomologia, 35, 121–125.

    Harris, S.C. & Holzenthal, R.W. (1994) Hydroptilidae (Trichoptera) of Costa Rica and the Neotropics: Systematics of the genus Byrsopteryx Flint (Stactobiini). Journal of the New York Entomological Society, 102, 154–192.

    Holzenthal, R.W. & Calor, A.R. (2017) Catalog of the Neotropical Trichoptera (Caddisflies). Zookeys, 654, 1–566.

    Holzenthal, R.W. & Harris, S.C. (1999) The genus Costatrichia Mosely in Costa Rica, with a review of the Neotropical species (Trichoptera: Hydroptilidae). Proceedings of the Entomological Society of Washington, 101 (3), 540–568.

    Malicky, H. (2001) Notes on the taxonomy of Rhadicoleptus, Ptilocolepus, and Pseudoneureclipsis. Braueria, 28, 19–20.

    Manzo, V., Romero, F., Rueda-Martín, P., Molineri, C., Nieto, C., Rodriguez, J. & Dominguez, E. (2014) Insectos acuáticos del Parque Provincial Urugua-í, Argentina. Revista de la Sociedad Entomológica Argentina, 73, 155–170.

    Marshall, J.E. (1979) A review of the genera of the Hydroptilidae (Trichoptera). Bulletin of the British Museum (Natural History), Entomology, 39, 135–239.

    Morse, J.C., Frandsen, P.B., Graf, W. & Thomas, J.A. (2019) Diversity and ecosystem services of Trichoptera. Insects, 10, 125.

    Mosely, M.E. (1939) The Brazilian Hydroptilidae (Trichoptera). Novitates Zoologicae, 41, 217–239.

    Oláh, J. & Flint, O.S. Jr. (2012) Description of new species in the Leucotrichiini tribe (Trichoptera: Hydroptilidae). Annales Historico-Naturales Musei Nationalis Hungarici, 104, 131–213.

    Oláh, J. & Johanson, K.A. (2011) New Neotropical Hydroptilidae (Trichoptera). Annales Historico-Naturales Musei Nationalis Hungarici, 103, 117–255.

    Santos, A.P.M. & Nessimian, J.L. (2010) The occurrence of the microcaddisfly Costatrichia (Trichoptera: Hydroptilidae: Hydroptilinae) in Brazil with description of two new species. Zoologia, 27, 837–843.

    Santos, A.P.M., Takiya, D.M. & Nessimian, J.L. (2013) Two new species of Costatrichia (Trichoptera: Hydroptilidae: Leucotrichiinae). Zoologia, 30 (4), 447–450.

    Santos, A.P.M., Nessimian, J.L. & Takiya, D.M. (2016) Revised classification and evolution of leucotrichiine microcaddisflies (Trichoptera: Hydroptilidae) based on morphological and molecular data. Systematic Entomology, 41, 458–480.

    Thomson, R.E. & Holzenthal, R.W. (2012) New species and records of Hydroptilidae (Trichoptera) from Venezuela. ZooKeys, 185, 19–39.