Two new species of Hydroptilidae (Trichoptera) from Brazil are described: Betrichia alibrachia sp. n. and Leucotrichia bicornuta sp.n. Both genera are members of the subfamily Leucotrichiinae. Illustrations of male genitalia are provided with each description. These additions bring the total world fauna of Betrichia to 9 species and Leucotrichia to 29 species. 1. Introduction The subfamily Leucotrichiinae (type genus Leucotrichia Mosely, 1934) was established by Flint (1970) and currently contains 16 genera: Abtrichia, Acostatrichia, Alisotrichia, Anchitrichia, Ascotrichia, Betrichia, Celaenotrichia, Cerasmatrichia, Ceratotrichia, Costatrichia, Eutonella, Leucotrichia, Mejicanotrichia, Peltopsyche, Scelobotrichia, and Zumatrichia [1, 2]. The distribution of the subfamily is limited to the New World and found predominantly in Central America [3, 4]. Mosely (1939) established the genus Betrichia for a single species, Betrichia zilbra, from Brazil (Santa Catarina) [5]. No exact reasons were stated, but presumably the genus was erected on account of venational, antennal, and general male genitalic features [3]. Additional species and distributions have been provided by Angrisano, Flint, and Olah and Johanson [6–10]. Up to and including species described by Olah and Johanson in 2011, Betrichia contained a total of 8 extant species (Table 1) [2, 10]. As a genus, its distribution is limited to eastern South America (Table 1) [4]. Immature stages are unknown [3]. Adults are attracted to lights and can generally be found near lowland rivers [4]. Table 1: Species and distributions of Betrichia and Leucotrichia. Mosely (1934) established the genus Leucotrichia for a single species, Leucotrichia melleopicta, from Mexico (Tabasco) [11]. Additional species descriptions and distributions have been provided by Angrisano and Burgos, Banks, Botosaneanu (in Botosaneanu and Alkins-Koo), Bueno-Soria, Bueno-Soria et al., Flint, Olah and Johanson, Ross, Rueda Martín, Sattler and Sykora, and Wells and Wichard [1, 10, 12–23]. Up to and including species described by Olah and Johanson and Rueda Martín in 2011, Leucotrichia contained a total of 28 extant species (Table 1) [2, 10, 20]. The distribution of the genus includes most of the continental USA, the Greater and southern Lesser Antilles, Central America, and northern South America (Table 2) [4]. A single fossil species, Leucotrichia adela, is known from Dominican amber [22]. Adults occasionally come to light but are usually taken by net during the day from marginal foliage [4]. Table 2: Species groups of Leucotrichia. In
References
[1]
O. S. Flint Jr., “Studies of Neotropical caddisflies, X: Leucotrichia and related genera from North and Central America (Trichoptera: Hydroptildiae),” Smithsonian Contributions to Zoology, vol. 60, pp. 1–64, 1970.
[2]
J. C. Morse, “Trichoptera World Checklist,” 2012, http://www.clemson.edu/cafls/departments/esps/database/trichopt/.
[3]
J. E. Marshall, “A review of the genera of the Hydroptilidae (Trichoptera),” Bulletin of the British Museum (Natural History) Entomology Series, vol. 39, pp. 135–239, 1979.
[4]
O. S. Flint Jr., R. W. Holzenthal, and S. C. Harris, Catalog of the Neotropical Caddisflies (Insecta: Trichoptera), Special Publication of the Ohio Biological Survey, Columbus, Ohio, USA, 1999.
[5]
M. E. Mosely, “The Brazilian Hydroptilidae (Trichoptera),” Novitates Zoologicae, vol. 41, pp. 217–239, 1939.
[6]
E. B. Angrisano, “Contribucíon al conocimiento de los Trichoptera del Uruguay. II. Familia Hydroptilidae,” Revista Brasileira de Entomologia, vol. 39, pp. 501–516, 1995.
[7]
O. S. Flint Jr., “Studies of Neotropical caddisflies, XIV: on a collection from northern Argentina,” Proceedings of the Biological Society of Washington, vol. 85, pp. 223–248, 1972.
[8]
O. S. Flint Jr., “Studies of Neotropical caddisflies, XV: the Trichoptera of Surinam,” Studies on the Fauna of Suriname and other Guyanas, vol. 14, pp. 1–151, 1974.
[9]
O. S. Flint Jr., “Studies of Neotropical caddisflies, XXXIII: new species from austral South America (Trichoptera),” Smithsonian Contributions to Zoology, vol. 377, pp. 1–100, 1983.
[10]
J. Olah and K. A. Johanson, “New Neotropical Hydroptilidae (Trichoptera),” Annales Historico-Naturales Musei Nationalis Hungarici, vol. 103, pp. 117–255, 2011.
[11]
M. E. Mosely, “New exotic Hydroptilidae,” Transactions of the Royal Entomological Society of London, vol. 82, pp. 137–163, 1934.
[12]
N. Banks, “Description of new species of North American neutoperoid insects,” Transactions of the American Entomological Society, vol. 37, pp. 335–360, 1911.
[13]
L. Botosaneanu and M. Alkins-Koo, “The caddis flies (Insecta: Trichoptera) of Trinidad and Tobago, West Indies,” Bulletin de l’Institut des Sciences Naturelles de Belgique, Entomologie, vol. 63, pp. 5–45, 1993.
[14]
J. Bueno-Soria, “Some new Trichoptera (Glossosomatidae, Hydroptilidae, Hydropsychidae and Polycentropodidae) from Mexico,” Proceedings of the Entomological Society of Washington, vol. 112, no. 1, pp. 22–31, 2010.
[15]
J. Bueno-Soria, S. Santiago-Fragoso, and R. Barba-Alvarez, “Studies in aquatic insects, XVIII: New species and new record of caddisflies (Trichoptera) from Mexico,” Entomological News, vol. 112, no. 3, pp. 145–158, 2001.
[16]
O. S. Flint Jr., “The caddisflies (Trichoptera) of Puerto Rico,” University of Puerto Rico, Agricultural Experiment Station, Technical Paper, vol. 40, pp. 1–80, 1964.
[17]
O. S. Flint Jr., “Studies of Neotropical caddisflies, XLV: the taxonomy, phenology, and faunistics of the Trichoptera of Antioquia, Colombia,” Smithsonian Contributions to Zoology, vol. 520, pp. 1–113, 1991.
[18]
O. S. Flint Jr., “Studies of neotropical caddisflies LV: Trichoptera of Trinidad and Tobago,” Transactions of the American Entomological Society, vol. 122, no. 2-3, pp. 67–113, 1996.
[19]
H. H. Ross, “The caddisflies or Trichoptera of Illinois,” Bulletin of the Illinois Natural History Survey, vol. 23, pp. 1–326, 1944.
[20]
P. A. Rueda Martín, “New Hydroptilidae and new records from north-western Argentina and Bolivia (Trichoptera: Hydroptilidae),” Aquatic Insects, vol. 33, pp. 1–11, 2011.
[21]
W. Sattler and J. L. Sykora, “über eine, besonders durch ihr Bauinstinkt, merkwürdige neotropische K？cherfliege—Leucotrichia brasiliana n. sp,” Amazonia, vol. 6, pp. 137–255, 1977.
[22]
A. Wells and W. Wichard, “Caddisflies of Dominican amber VI. Hydroptilidae (Trichoptera),” Studies on Neotropical Fauna & Environment, vol. 24, no. 1, pp. 41–51, 1989.
[23]
E. B. Angrisano and G. N. Burgos, “Contribución para el conocimiento de los Leucotrichiini (Trichoptera: Hydroptilidae). Tres especies nuevas de la Argentina,” Revista de la Sociedad Entomológica Argentina, vol. 61, pp. 103–109, 2002.
[24]
H. Malicky, “Notes on the taxonomy of Rhadicoleptus, Ptilocolepus and Pseudoneureclipsis,” Braueria, vol. 28, pp. 19–20, 2001.
[25]
J. R. McAuliffe, “Behavior and life history of Leucotrichia pictipes (Banks) ( Trichoptera: Hydroptilidae) with special emphasis on case reoccupancy,” Canadian Journal of Zoology, vol. 60, no. 7, pp. 1557–1561, 1982.
[26]
G. B. Wiggins, “Larvae of the North American Caddisfly Genera (Trichoptera),” pp. University of Toronto Press–Toronto, Canada, 1996.
[27]
R. J. Blahnik, R. W. Holzenthal, and A. Prather, “The lactic acid method for clearing Trichoptera genitalia,” in Proceedings of the 12th International Symposium on Trichoptera, J. Bueno-Soria, R. Barba-Alvarez, and B. Armitage, Eds., The Caddis Press, Columbus, Ohio, USA, 2007.
[28]
M. J. Dallwitz, T. A. Paine, and E. J. Zurcher, “User’s guide to DELTA Editor,” 2012, http://delta-intkey.com/.
[29]
R. W. Holzenthal and T. Andersen, “The caddisfly genus Triaenodes in the Neotropics (Trichoptera: Leptoceridae),” Zootaxa, vol. 511, pp. 1–80, 2004.
