Cirrholovenia sp., 1959

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 : 820-821

Cirrholovenia sp.

( Figure 5F, G )

Material examined

1 colony, polyp, without gonophores; Agua de Yepiz, La Paz Bay , Baja California Sur, 24.288°N, 110.630°W; depth 0–1 m; 24 June 2018; on the alga Sargassum sp .; ECO-CH-Z 11788 .

Identification (after Calder et al. 2003; Migotto and Cabral 2005)

Colony stolonal. Hydrothecae tubular, 0.2 mm long, arising directly from hydrorhiza and adnate from proximal part. Hydrothecal margin presented as a continuation of notsegmented operculum, which folds upon itself forming pleats.

Distribution

New record for the MP. The specimen resembles Cirrholovenia tetranema ( Calder et al. 2003; Migotto and Cabral 2005) which is the only species between C. polynema , C. reticulata and C. violacea with a morphological description of its benthic phase ( Kramp 1959; Xu and Huang 2004; Gershwin et al. 2010; Tosetto et al. 2021). Therefore, this identification remains as Cirrholovenia sp. , until more life cycle and morphological data is generated for this genus.

Remarks

The shape of the hydrotheca shows similarities with the genus Lafoeina ; however, structures such as nematothecae and gonothecae were not observed, which are important to determine it at a more specific level ( Calder 1991; Calder et al. 2003; Moura 2015).

Figures

Figure 5. (A–C) Hydrocoryne sp.: A, hydranth; B, undischarged microbasic eurytele and stenotele nematocysts; C, discharged stenotele nematocyst. D, Porpita porpita (Linnaeus, 1758): colony. E, Corydendrium sp.: colony. (F, G) Cirrholovenia sp.: F, colony; G, hydrotheca. Scale bars: A = 500 μm; B, C = 20 μm; G = 100 μm. Photograph taken by Ángel Silveyra Bustamante (D).