| Sumario: | Five species of epibenthic pycnogonids collected on the giant lion´s-paw scallop Nodipecten subnodosus
are recorded. A new species of Eurycyde, E. bamberi, is described. Of the 19 species known in this genus;
the new species is closest to E. hispida Kroyer, 1844 but differs from it in the absence of plumose spines
and the shapes of the lateral process, first coxa, and ocular tubercle. The new species represents the third
member of Eurycyde from the eastern Pacific in addition to E. spinosa Hilton, 1916 and E. clitellaria Stock,
1955. Besides E. bamberi, the following species were collected: Nymphopsis duodorsospinosa Hilton, 1942c;
Callipallene californiensis (Hall, 1913); Nymphon lituus Child, 1979; and Pycnogonum rickettsi Schmitt,
1934. Pycnogonum rickettsi is recorded for first time from Mexican waters, as is Nymphon lituus from the
western coast of Baja California Peninsula. Each of these four species are re-described and re-illustrated in
order to fill in existing gaps in the literature of the region.
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