Echinoidea of Oregon

Abstract

Ten species of echinoids are known to occur off Oregon. Three distinct bathymetric groups are recognized: Strongylocentrotus purpuratus, S. franciscanus, and Dendraster excentricus occur in shallow waters from intertidal down to about 65 m; S. echinoides occurs on the outer continental shelf, and Brisaster latifrons and Allocentrotus fragilis occur on the outer shelf and upper slope at depths of about 70–840 m; and Aëropsis fulva, Sperosoma giganteum, Urechinus loveni, and Ceratophysa rosea are found in deep water from depths of 2090 to 3000 m. Bathymetric ranges are extended for six species and geographic ranges are extended for five species.

Harlequin Ducks (<i>Histrionicus histrionicus</i>) Scavenge Sea Urchin Fragments from Foraging Sea Otters (<i>Enhydra lutris</i>)

“…Harlequin Ducks typically forage on intertidal snails, crabs, amphipods, and limpets (Vermeer 1983;gaines and Fitzner 1987;rodway and cooke 2002;Bond and Esler 2006;Esler and Bond 2010) in waters less than 5 m deep (Holm and Burger 2002), whereas red Sea Urchins occur in the shallow subtidal area to depths up to 125 m (Mccauley and carey 1967), and are rare in Harlequin Duck diets. Urchin size can affect their quality as prey, with large reproductive urchins being higher in lipids and key nutrients than the smaller immature individuals that might be available to Harlequin Ducks unassisted by Sea Otters (Oftedal et al 2007).…”

Taxonomy and distribution of sea anemones (Cnidaria: Actiniaria and Corallimorpharia) from deep water of the northeastern Pacific

“…Most specimens were collected by beam and otter trawls in the northeastern Pacific Ocean from southern California to British Columbia to a depth of 4,325 m. Many were collected during studies off the coast of Oregon in the 1960s and 1970s by Andrew G. Carey, Jr. of Oregon State University (e.g. McCauley & Carey 1967;Carney & Carey 1982), and approximately 200 km off the coast of southern California at Station M (Smith et al 1994) in the 1990s by Kenneth L. Smith, Jr., then of Scripps Institution of Oceanography (now at the Monterey Bay Aquarium Research Institute, Moss Landing, California [MBARI]). Most of Carey's specimens are held at the Santa Barbara Museum of Natural History, Santa Barbara, California, USA (SBMNH), and Smith's are in the Division of Invertebrate Zoology of the University of Kansas Biodiversity Institute, Lawrence, Kansas, USA (KUIZ).…”

Abyssal echinoid and asteroid fauna of the North Pacific

“…Nevertheless Lambert and Thiéry (1924) established a subgenus Rodocystis for this species, stating that it differs from Pourtalesia mainly in having a marginal fasciole. In more recent publications (Clark H.L., 1925;Mortensen, 1950;McCauley and Carey, 1967;Smith and Kroh, 2011) this species was assigned to the genus Ceratophysa on the basis of having a large subanal rostrum and umbrella-shaped ophicephalous pedicellariae. Mironov (1975aMironov ( , 1978a Two characters used to assign Rodocystis rosea to Ceratophysa are convergent.…”

“…3-6;Mortensen, 1907: 79-80, pl. XI, 15, 26. Ceratophysa rosea Clark H.L., 1917: 128;Clark H.L., 1925: 190;Mortensen, 1950: 159-160;McCauley, Carey, 1967: 1396-1397. Lambert and Thiéry, 1924: 424. Rodocystis rosea -Mironov, 1975a: 210-212, figs.…”