- Descriptions and distributions are given of 28 species of
Liparidae occurring or possibly occurring below 200 m between San
Francisco and northern Vancouver Island, with keys for their identifications.
Nine genera are included: Careproctus, Elassodiscus,
Lipariscus, Nectoliparis, Rhinoliparis, Acantholiparis, Paraliparis,
and two new genera are described, Odontoliparis and Osteodiscus.
Eight new species are described: Careproctus filamentosus, C.
microstomus, C. oregonensis, Osteodiscus cascadiae, Odontoliparis
ferox, Paraliparis paucidens, P. megalopus, and P. pectoralis. One
generic change is made: Elassodiscus caudatus is removed from
Paraliparis. Second records of four species are reported: Careproctus
longifilis, C. ovigerum, Paraliparis latifrons, and Acantholiparis
caecus. The occurrence of four known species previously unreported
from Oregon is recorded: Careproctus longifilis, C. ovigerum, Paraliparis
latifrons, and P. rosaceus. Previously doubtful Oregon
occurrence of two species, Paraliparis dactylosus and P. ulochir, is
verified. Two rare species were collected: Paraliparis cephalus and
P. mento. Four species are included as possibly occurring off
Oregon: Careproctus cypselurus, Rhinoliparis barbulifer, Paraliparis
deani, and P. melanobranchus. Other species present are Careproctus
melanurus, C. gilberti, and Acantholiparis opercularis.
Of the 28 species from the study area, four are considered to
be pelagic: Nectoliparis pelagicus, Lipariscus nanus, Rhinoliparis
attenuatus, and Rhinoliparis barbulifer. The benthic species are
shown to be divisible into two groups based on depth distributions.
The shallower group contains 13 species which occur between 200-
2200 m; the deeper contains 11 species from 2200-3600 m.
Morphological characters are related to the depth distributions
of the species possessing them. Shallower species tend to have more
pectoral and caudal rays, and more pyloric caeca than deep living
species; they have pale skin, and darkly pigmented stomachs; the
opposite is true in deeper species. The more primitive genera of
deep water liparids do not occur shallower in the study area than more
derived genera, although the more primitive species within those