Clytia hemisphaerica (Linnaeus, 1767)

(Figure 8B)

Material examined

1 colony, polyp; Punta Diablo, La Paz Bay, Baja California Sur, 24.316°N, 110.340°W; depth 0–3 m; 14 September 2017; on barnacles, bivalve, and rock; ECO-CH-Z 11754 . – 1 colony, polyp, without gonophores; Punta Los Muertos, Baja California Sur, 24.248°N, 110.150°W; depth 1–2 m; 20 July 2018; on the algae Condracanthus sp . And Hypnea spinella; ECO-CH-Z 11766 . – 2 colonies, polyp, without gonophores; El Mogote Sand Bar, La Paz Bay, Baja California Sur, 24.159°N, 110.341°W; depth 0–2 m; 1 July 2019; on undetermined algae; ECO-CH-Z 11799 .

Identification (after Calder 1991)

Colonies stolonal; pedicels annulated basally and distally and smooth in the middle. Hydrothecae cone-shaped, walls convex just above the diaphragm, nearly straight elsewhere. Hydrothecal diaphragm straight, margin with 11–14 slender cusps separated by Ushaped incisions, with tips of cusps rounded. U-shaped pleat extending inwards into hydrothecal cavity. Gonotheca arising from hydrorhiza on short slender pedicels; gonothecal walls with distinct spiral ribs. Gonotheca with short tubular neck; distal end truncate.

Distribution

Previously reported from the west coast of the Gulf of California, Baja California (Fraser 1938b), making it a new record for Baja California Sur. In the rest of the Gulf of California it has been recorded in Sonora (Fraser 1948) and in the MP in Baja California, Baja California Sur, Colima, Jalisco, Oaxaca (Fraser 1938a, 1948), and Guerrero (Salcedo-Martínez et al. 1988).