Monocorophium insidiosum (Crawford, 1937)

Cházaro-Olvera, Sergio, Winfield, Ignacio, Ortiz, Manuel & Álvarez, Fernando, 2002, Peracarid crustaceans from three inlets in the southwestern Gulf of Mexico: new records and range extensions, Zootaxa 123, pp. 1-16 : 6

Monocorophium insidiosum (Crawford, 1937)

Material examined: CNCR­20395; number of specimens: 1, 2; SM station; collection date: 16/10/98.

Type locality: Oakland, San Francisco, California.

Distribution: This species has been reported from Denmark, Germany, England ( Shoemaker, 1947); Mediterranean Sea ( Myers, 1983); from Chateur Bay to Chesapeake Bay ( Shoemaker, 1947; Bousfield, 1973); Terminos Lagoon, Campeche, Mexico ( Ledoyer, 1986); Cuba ( Ortiz & Lalana, 1989); Pacific coast of North America, from Alaska to northern California in coastal marine and brackish waters ( Bousfield & Hoover, 1997); Hawaii ( Barnard, 1970) and Japan ( Hirayama, 1984).

Range extension: Within the Gulf of Mexico, this species has only been recorded in Terminos Lagoon, Campeche, Mexico ( Ledoyer, 1986), therefore the presence of these specimens at SM inlet extends its geographic distribution to Tamaulipas State, Mexico.

Remarks: Monocorophium insidiosum is associated with Halodule and Thalassia seagrasses, and algal beds ( Ledoyer, 1986). Apparently, M. insidiosum is a widely distributed species that has been transported to different world regions ( Barnard, 1970).

The salinity and temperature ranges measured at the collection site were 24 to 26 %o and 27 to 28 °C, respectively.