Comprehensive Description
provided by Smithsonian Contributions to Zoology
Hydrochasma faciale (Williston)
Discocerina faciale Williston, 1896:396.
Hydrochasma zernyi Hendel, 1936:103.—Wirth, 1968:8 [synonymy].
Hydrochasma capax Cresson, 1938:26.—Wirth, 1968:8 [synonymy].
Hydrochasma faciale.—Wirth, 1968:8 [generic combination; Neotropical catalog].—Mathis and Edmiston, 1991:825–826 [discussion].
SPECIMENS EXAMINED.—BELIZE. Stann Creek District: Twin Cays (south end of East Island), Mar 1988, W.N. Mathis (1).
DISTRIBUTION.—Nearctic: USA (AZ, CA, TX). Neotropical: Argentina, Belize, Brazil, Ecuador, Guatemala, West Indies (Dominica, Dominican Republic, Puerto Rico, St. Vincent).
DIAGNOSIS.—This species is distinguished from congeners by the following combination of characters: antennal coloration nearly evenly divided between yellowish and dark gray, dorsal and anterior surfaces of pedicel and first flagellomere extensively dark gray; parafacial silvery white, concolorous with facial coloration; forefemur bearing a distinctive, comb-like row of stout setulae along anteroventral surface; tibiae mostly gray; and abdomen lacking wedge-shaped silvery gray areas.
Hydrochasma species
SPECIMENS EXAMINED.—BELIZE. Stann Creek District: Twin Cays (Aanderaa Flats, West Bay), Mar 1988, W.N. Mathis (1, 1).
DIAGNOSIS.—This species is distinguished from congeners by the following combination of characters: antenna mostly dark gray; parafacial silvery white, concolorous with facial coloration; forefemur lacking a distinctive, comb-like row of stout setulae along anteroventral surface; tibiae mostly gray; and abdomen lacking wedge-shaped silvery gray areas.
- bibliographic citation
- Mathis, Wayne Neilsen. 1997. "Shore Flies of the Belizean Cays (Diptera: Ephydridae)." Smithsonian Contributions to Zoology. 1-77. https://doi.org/10.5479/si.00810282.592
Distribution
provided by Zookeys
(Fig. 25). Nearctic: United States (Arizona, California). Neotropical: Belize (Stann Creek), Brazil (Pará, Paraná, São Paulo), Guatemala, Guyana, Trinidad and Tobago, West Indies (Cuba, Dominica, Dominican Republic, Grenada, Jamaica, Puerto Rico, St. Lucia, St. Vincent).
Natural History.-This species occurs along freshwater streams and rivers or sometimes brackish water systems (where a freshwater stream or river is entering the ocean) that have sandy areas that are mostly bare of vegetation.
- license
- cc-by-3.0
- copyright
- Wayne N. Mathis, Tadeusz Zatwarnicki
- bibliographic citation
- Mathis W, Zatwarnicki T (2013) A revision of the shore-fly genus Hydrochasma Hendel (Diptera, Ephydridae) ZooKeys 363: 1–161
- author
- Wayne N. Mathis
- author
- Tadeusz Zatwarnicki