Synidotea pettiboneae Hatch 1947

Synidotea pettiboneae Hatch, 1947

Synidotea consolidata.—Benedict, 1897, p. 393, fig. 3.—Richardson 1899, p. 848; 1900, p. 227; 1905, pp. 383–384, figs. 420, 421.—Hatch 1947, p. 219.—Menzies and Miller 1954, pp. 144, 154.—Schultz 1969, pp. 65–66, fig. 72.

Synidotea pettiboneae Hatch, 1947, p. 221, pl. 14, figs. 168, 169.—Menzies and Miller 1954, p. 154.—Schultz 1969, p. 65, fig. 70.

DIAGNOSIS.—Cephalon. Preocular horns large but directed laterally, rather than frontally (as in S. ritteri), and accordingly extend only slightly beyond frontal margin; frontal border slightly excavate between preocular horns; eyes bulging and extending outward as part of lateral contour; 2 large spiniform tubercles in front of, and medial to, eyes; behind these is another pair of more swollen tubercles.

Pereon. Dorsolateral surface of each pereonite with a transverse row of 3 sharp tubercles; pereonites 1–3 with lateral margins sharply angulate; borders of others become progressively less angulate posteriorly.

Pleon. Posterior border with median excavation. Appendix masculina flattened and expanded near apex, with lateral and medial borders near expanded areas serrated, apex pointed. Pleotelson slightly wider than long.

GEOGRAPHICAL RANGE.—Neah Bay, Washington to Pillar Point, San Mateo County, California.

LOCALITIES.—

Washington. Clallam County: Neah Bay, 27–55 meters, 6 July 1940, M. Pettibone (University of Washington collections of M. Hatch); Lapush, intertidal, 29 August 1969, M. A. Miller.

California. Sonoma County, Shell Beach, 14 August 1968, J. Bodle. Marin County: Dillon Beach, intertidal with hydroids and bryozoans, October 1947, R. J. Menzies; 0.5–1.0 mile west of Dillon Beach, 9–10 meters, 11 July 1947, R. J. Menzies; intertidal on Aglaophenia (with our later described new species), 12 June 1941, G. M. Schreiber. San Mateo County, Pillar Point, intertidal, 4 June 1939, W. M. Marshal. Monterey County, Pacific Grove (Benedict 1897).

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