17 p. : 26 cm

"The valviferan isopods of the Gulf of California are reviewed, including eight species in four genera. One rediscovered species (Eusymmerus antennatus) and two new species (Colidotea findleyi and Erichsonella cortezi) are fully described. Two of the Gulf idoteids appear to be of subtropical or tropical origin (Eusymmerus antennatus and Colidotea findleyi), whereas the others appear to be cold or warm temperate derived species (Erichsonella cortezi, Idotea aculeata, I. urotoma, I. stenops, I. resecata, and I. wosnesenskii). These findings suggest, as other distributional data have, that the family Idoteidae is composed largely of cool to warm temperate-centered taxa, with few modern genera and species having evolved in the lower latitudes (e.g., Eusymmerus, Colidotea, and some species of Erichsonella). Members of this family, in the tropical and subtropical east Pacific, are generally found in association with littoral and shallow-water algae, especially species of Sargassum. Four species of Idotea are extremely wide-ranging forms, suggesting that members of this genus may be considerably more eurythermal than previously suspected. Idotea wosnesenskii and I. resecata range from the Gulf of California to Alaska; I. stenops ranges from Baja California (or possibly the Gulf of California) to Oregon; and I. urotoma ranges from the Gulf of California to Puget Sound"--P. [1]

Title from caption

"October 11, 1977."

Includes bibliographical references (p. 15-17)

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