Leucotrichia sarita Ross, 1944,

Thomson, Robin E. & Holzenthal, Ralph W., 2015, A revision of the Neotropical caddisfly genus Leucotrichia Mosely, 1934 (Hydroptilidae, Leucotrichiinae), ZooKeys 499, pp. 1-100: 37-38

publication ID


publication LSID


persistent identifier


treatment provided by

ZooKeys by Pensoft

scientific name

Leucotrichia sarita Ross, 1944


Taxon classification Animalia Trichoptera Hydroptilidae

Leucotrichia sarita Ross, 1944  Figs 4D, 39

sarita  Ross, 1944: 274 [Type locality: United States, Texas, Balmorhea, along stone irrigation flume; INHS; male]. - Flint 1970: 9 [male, larva, case, distribution].


Leucotrichia sarita  is similar to Leucotrichia fairchildi  , Leucotrichia imitator  , and Leucotrichia pictipes  . Leucotrichia sarita  is distinct from Leucotrichia imitator  and possesses a more modified head, due to the presence of eversible posterolateral warts (Fig. 4D). It does not have any of the further head modifications found on either Leucotrichia fairchildi  or Leucotrichia pictipes  . The presence of the membranous lobes on the phallus terminating in sclerotized spines also distinguishes Leucotrichia sarita  from the other 3 species of the pictipes  species group.


Male. Length of forewing 2.1-3.0 mm (n=306). Head with posterolateral wart large, eversible, with membranous lobe beneath, with 2 ocelli; antennae unmodified. Dorsum of head brown with yellow setae; thorax brown with dark brown and yellow setae dorsally, brown ventrally; leg segments with brown setae. Forewings covered with fine dark brown setae with stripe of yellow setae running the length of basal 1/3 and scattered patches of yellow setae near apex. Genitalia. Abdominal sternum VII with mesoventral process absent, in its place a few dark, prominent setae. Sternum VIII in ventral view with posterior margin concave. Segment IX anterolateral margin convex, posterolateral margin irregular; in dorsal view anterior margin concave, posterior margin concave. Tergum × with dorsal sclerite slender; ventral sclerite semielliptic with crenulate posterior margin; membranous apex with dorsal and ventral lobes. Subgenital plate with dorsal arm not apparent; ventral arm hollow, subtriangular, with basal projection, curved dorsad, in ventral view lanceolate. Inferior appendage straight, digitate, bearing single dorsal spine; in ventral view broadly fused, apex rounded, with small apical “lip” (Fig. 39D). Phallus apex bearing pair of mesolateral lobes ending in sclerotized spine and numerous small apical spines on dorsal and lateral surface.

Material examined.

Holotype male: USA: Texas: Balmorhea, along stone irrigation flume, 19.iv.1939, H.H. and J.A. Ross (in alcohol) (INHS Trichoptera  #22339) (INHS). Nontypes: COSTA RICA: Alajuela: Río Agrio, ca. 3.5 km NE Bajos del Toro, 10.243°N, 84.279°W, 20.viii.1990, el. 1290m, Holzenthal et al., 5 males, 9 females (UMSP); Cartago: Reserva Tapanti, Quebrada Palmitos and falls, 9.72°N, 83.78°W, 23.viii.1990, el. 1400 m, Holzenthal and Huisman, 1 male (UMSP); Guanacaste: Parque Nacional Guanacaste, El Hacha, Queb. Alcornoque, 11.009N 85.577W, 26. vii.1987, el. 250m, Holzenthal, Morse, and Clausen, 1 male (in alcohol) (UMSP); Las Canas: 13.vii.1965, P.J. Spangler, 1 female (NMNH); Río Seco, NW of Esparta, 23.vii.1967, O.S. Flint, Jr., 1 male (in alcohol) (NMNH); 13.vii.1965, P.J. Spangler, 4 males, 20 females (in alcohol) (NMNH); Puntarenas: Río Jaba at rock quarry, 1.4km (air) W Las Cruces, 8.79°N, 82.97°W, 9.viii.1990, el. 1150m, Holzenthal, Blahnik, and Muñoz, 1 male (UMSP); GUATEMALA: Retalhuleu: Puente El Niño, 16.vii.1966, Flint and Ortiz, 1 female (NMNH); San Marcos: Puente Ixben, 15.vii.1966, Flint and Ortiz, 3 males (NMNH); Suchitepéquez: Cuyotenango, 10-20.vi.1966, Flint and Ortiz, 1 female (NMNH); MEXICO: Chiapas: Rt. 35, 4 km N Arriaga, 9.xii.1975, C.M. and O.S. Flint, Jr., 1 male (in alcohol) (NMNH); near Pijijiapan, 5.vii.1965, P.J. Spangler, 1 male (in alcohol) (NMNH); Guerrero: Acahuizoltla, 10.xu.1982, J. Bueno and E. Borrera, 1 male (in alcohol) (NMNH); Michoacán: San Lorenzo, Rt. 15 km 206, 14-15.vii.1966, Flint and Ortiz, 4 males, 2 females (NMNH); same, 3 males, 2 females (in alcohol) (NMNH); Morelos: Xochitepec, 12-14.vii.1965, Flint and Ortiz, 8 males, 3 females (NMNH); near Xochitepec, Rt. 95 km 91, 1.viii.1965, O.S. Flint, Jr., 7 males, 9 females (in alcohol) (NMNH); Oaxaca: Isthmus Tehuantepec, Jaltepec, 21.v.1964, F.S. Blanton, 1 male (in alcohol) (NMNH); Tehuantepec, 23.vii.1964, P.J. Spangler, 6 females (in alcohol) (NMNH); Veracruz: near El Lencero, Rt. 140 km 437, 22.vii.1965, Flint and Ortiz, 5 males (NMNH); Plan del Río Ver, Rt. 140 km 368, 23.vii.1965, Flint and Ortiz, 2 males, 7 females (NMNH); Fortín de las Flores, ?.vi.1964, light trap, F.S. Blantoni, 1 male (in alcohol) (NMNH); Río Tacolapan, Rt. 180 km 551, 25-26.vii.1966, Flint and Ortiz, 1 male (in alcohol) (NMNH); Cultlahuac, 10-12.viii.1964, P.J. Spangler, 2 males, 5 females (in alcohol) (NMNH); USA: California: Truckee, 8.viii.1915, H.G. Dyar, 1 female (NMNH); Maryland: Washington Co., C and O Canal, Harpers Ferry Vicinity, 7.v.1972, G.F. and S. Hevel, 1 female (NMNH); Montgomery Co., Potomac River, Cardero Creek recreation area, 5.ix.1976, J. Heppner, 1 male (NMNH); Nevada: Reno, 2.viii.1916, H.G. Dyar, 2 males, 5 females (NMNH); Reno, 3.viii.1916, H.G. Dyar, 54 males, 3 females (NMNH); New Mexico: Jemez Springs, 4.vii.1953, W.W. Wirth, 1 male (NMNH); Oregon: Klamath Lake, 27.vii.????, Dyar and Caudell, 3 males, 2 females (NMNH); Texas: Val Verde Co., Devils River, Dolan Falls area, elev. 360 m, 17-20.v.1993, malaise trap with UV light at spring along Dolan Creek, Gelhaus #589, Nelson, and Koenig, 8 males, 7 females (in alcohol) (NMNH); Val Verde Co., San Felipe Springs, Del Rio, 29°22.1'N, 100°53.1'W, 1.vi.1997, C.M. and O.S. Flint, Jr., 169 males, 88 females (NMNH); Virginia: Highland Co., Locust Springs, beaver ponds, 12.ix.1979, C.M. and O.S. Flint, Jr., 1 female (NMNH); Fauquier Co., Broad Run, Thoroughfare Gap, 10.v.1974, O.S. Flint, Jr., 3 males, 6 females (NMNH); Madison, Criglersville, 1.6 km NW, 38°28.4'N, 78°19.9'W, elev. 185 m, 19.v.2005, W.N. and D. Mathis, 1 male (NMNH).