Medusozoans from the Mexican Pacific: a review based on historical literature and recent observations Author Estrada-González, Mariae C. Author Agüero, José Author Mendoza-Becerril, María A. text Journal of Natural History 2023 2023-06-15 57 1 784 853 http://dx.doi.org/10.1080/00222933.2023.2214967 journal article 60720 10.1080/00222933.2023.2214967 a9bb27e7-4ac2-4b5e-928e-9d8985ea179a 1464-5262 8224400 Macrorhynchia philippina Kirchenpauer, 1872 ( Figure 6G–I ) Material examined 1 colony, polyp, without gonophores; Caleritas Beach , La Paz Bay , Baja California Sur , 24.350N , 110.290°W ; depth 0–1 m , 30 April 2017 ; on rock; ECO-CH-Z 11773 . – 1 colony, polyp, without phylactocarps; Punta Los Muertos , Baja California Sur , 24.248°N , 110.150°W ; depth 1–2 m ; 20 July 2018 ; on the alga Bryopsis sp ., ascidian, and Bryozoa ; ECO-CH-Z 11765 . – 1 colony, polyp, without phylactocarps; El Mogote Sand Bar , La Paz Bay , Baja California Sur , 24.159°N, 110.341°; depth 0–2 m ; 1 July 2019 ; on ascidian; ECO-CH-Z 11796 . Identification (after Calder 1997 ; Di Camillo et al. 2009 ) Colonies erect; hydrocaulus polysiphonic basally and monosiphonic distally, twice-pinnately branched, divided into internodes by transverse to slightly oblique nodes. Internodes from the anterior side of the primary hydrocaulus with a distal hydrocladial apophysis, a mamelon, and two nematothecae, one basal and the other axillary. Hydrocladia divided into thecate internodes by oblique nodes, each internode with a hydrotheca, three nematothecae, one median inferior and one pair lateral, and two internodal septa. Hydrothecae with abcauline wall convex except for pronounced concavity just below margin; adcauline intrathecal septum prominent extending about halfway across the intrathecal cavity. Hydrothecal margin sinuous in lateral view, with two short lateral cusps and a short median abcauline cusp. Median inferior nematotheca reaches beyond the hydrotheca margin distally, adnate to the abcauline wall of hydrothecal as far as intrathecal septum; lateral nematothecae adnate to hydrothecal wall, extending beyond margin of hydrothecae. Distribution Previously recorded on the west coast of the Gulf of California , Baja California Sur ( Fraser 1938b , 1948 ; Baynes 1999 ), and for the rest of the gulf in Nayarit and Sonora ( Fraser 1938c , 1948 ). In the MP, it has been recorded off the coasts of Jalisco and Guerrero ( Fraser 1938a , 1938c ).