. Annual report - Western Society of Malacologists. Mollusks; Mollusks. Robertson, 1957; Wells & Wells, 1961; Merrill & Boss, 1964; Boss & Merrill, 1965; Porter, 1976). Chrysallida dianthophila (Wells & Wells) has been reported on four different serpulid polychaete hosts (Wells & Wells, 1961, 1969). Menestho impressa (Say) has been observed to feed on eight hosts, including five gastropods, a pelecypod, a polychaete, and a tunicate (Hopkins, 1956; Allen, 1958). Twelve hosts have been reported for Menestho bisuturalis (Say), including four bivalves and eight gastropods (Medc
. Annual report - Western Society of Malacologists. Mollusks; Mollusks. Robertson, 1957; Wells & Wells, 1961; Merrill & Boss, 1964; Boss & Merrill, 1965; Porter, 1976). Chrysallida dianthophila (Wells & Wells) has been reported on four different serpulid polychaete hosts (Wells & Wells, 1961, 1969). Menestho impressa (Say) has been observed to feed on eight hosts, including five gastropods, a pelecypod, a polychaete, and a tunicate (Hopkins, 1956; Allen, 1958). Twelve hosts have been reported for Menestho bisuturalis (Say), including four bivalves and eight gastropods (Medcof, 1948; Hopkins, 1956; Loos- anoff, 1956; Boss & Menill, 1965; Scheltema, 1965; Robertson, 1967; Bullock & Boss, 1971). MULTIPLE HOSTS OF EASTERN PACIFIC CHRYSALLIDA There have been very few host associations published for eastern Pacific pyramidellids. and thus far no cases of multiple hosts. My field observations and specimens with detailed habitat information in the Los Angeles County Museum of Natural History document multiple hosts for one eastern Pacific species of Chrysallida and are suggestive of multiple hosts for another. Chrysallida cincta Carpenter, 1864, is now known to have five, possibly six gastropod hosts. Figure 1 shows C cincta in place on the operculum of Tegula eiseni Jordan from San Pedro, California. As many as four adults have been found on a single host, invariably on the oper- culum in living material. This association has been found at numerous localities in southern California and Baja California Norte, Mexico. Though feeding was not observed, the consistent position of the Chrysallida and the absence of other potential hosts leaves little doubt that the Tegula is the Norrisia norrisi (Sowerby) is another trochid host of Chrysallida cincta. The parasite was found in place on the operculum of a dried specimen of Norrisia collected at Portuguese Bend, Palos Verdes Peninsula, Los Angeles County, California. Additional specimens were fou
Size: 1581px × 1581px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmollusks
