Eudendrium capillare Alder, 1856

Estrada-González, Mariae C., Agüero, José & Mendoza-Becerril, María A., 2023, Medusozoans from the Mexican Pacific: a review based on historical literature and recent observations, Journal of Natural History 57 (1), pp. 784-853 : 818-819

Eudendrium capillare Alder, 1856

( Figure 4D–E )

Material examined

3 colonies, polyp, without gonophores; Caleritas Beach, La Paz Bay , Baja California Sur, 24.350̊N, 110.290°W; depth 0–1 m, 30 April 2017; on rock; ECO-CH-Z 11776 . – 1 colony, polyp, with male 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 ascidian; ECO-CH-Z 11801 .

Identification (after Calder 1988; Marques 2001)

Colonies erect; hydrocaulus monosiphonic, arising from a creeping hydrorhiza, irregularly branching. Hydrocladia irregularly branched. Pedicels bent, terminating at groove around base of hydranth – annulations at base of hydrocaulus, hydrocladia, and pedicels, and irregularly placed annulations elsewhere. Hydranth urn-shaped, distinct perisarc groove basally, filiform tentacles in one whorl, hypostome flared. Male gonophores distal to perisarc groove on hydranth. Each gonophore with three chambers, the terminal chamber with an apical tubercle.

Distribution

Recorded on the west coast of the Gulf of California in Baja California Sur ( Mendoza-Becerril et al. 2020). In the MP,it has been reported from Baja California Sur and Colima ( Fraser 1948) .

Figures

Figure 4. A, Geryonia proboscidalis (Forsskål, 1775): medusa oral view. B, Coryne pusilla Gaertner, 1774: hydrant. C, Pennaria disticha Goldfuss, 1820: hydranth. (D, E) Eudendrium capillare Alder, 1856: D, hydranth; E, male gonophore. F, Janaria mirabilis Stechow, 1921: colony. Scale bars: B = 500 μm; C = 250 μm; D = 200 μm. Drawings made by Nicholas Bezio (A–E) and Mariae C. Estrada-González (F).