New evidence to demystify the supposed holoplanktonic life cycle in Ceriantharia (Cnidaria)

Lopes, Celine S. S.; Maronna, Maximiliano M.; Filho, José Eduardo Martinelli; Morandini, André C.; Stampar, Sérgio N.

doi:10.1007/s12526-022-01327-8

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Otherwise, instead of the planula, it may has a free-swimming larva named cerinula ( Van Beneden, 1897 ; McMurrich, 1910 ; Molodtsova, 2003 ) that can remains in the water column for a relatively long time ( Haime, 1854 ; Stampar et al, 2015b ). This cerinula is able to disperse over longer distances and colonize different habitats ( Lopes et al, 2023 ). Species such as A. errans sp.…”

Section: Discussionmentioning

confidence: 99%

“…Despite of the fact that ‘drastic’ changes do not occur in the morphology of the cerinula larva in comparison to adults of the ceriantharians, our results demonstrate increase and addition of structures in the adult stage, such as the number of tentacles and mesenteries, and elongation of the column. Therefore, a thorough taxonomic revision of the ceriantharian’s species should be performed (see Lopes et al, 2023 ).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Description and life cycle of a new species of the genus Arachnanthus (Cnidaria: Anthozoa: Ceriantharia) from the Southwestern Atlantic Ocean

Lopes

Scarabino

Carranza

et al. 2023

PeerJ

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Background Ceriantharia is a subclass of the phylum Cnidaria, which comprises tube-dwelling marine invertebrates. This subclass is composed of three families, including Arachnactidae, with two known genera. Currently, the genus Arachnanthus has five valid species recorded from Australia, the Mediterranean Sea and both the Southern and Northern Pacific Ocean. However, at the moment, there is no record of organisms of this family from the South Atlantic Ocean. Besides that, the life cycle of any species of the genus Arachnanthus is known. The present study describes a new species of the genus Arachnanthus and its life cycle, based on specimens from Uruguay and South of Brazil. Methods Larvae were collected by plankton net in Rio Grande—Brazil and the development and external morphology of these specimens were observed in the laboratory during two years, and subsequently described. Additionally, nine adult ceriantharians correspondent to the larvae from Rio Grande were collected in Uruguay and their external and internal anatomies, and cnidome were described. Results Arachnanthus errans sp. nov. exhibited a free-swimming, short-lived cerinula larvae that spent short-time on the plankton. The larva developed into small and translucent polyps with a short actinopharynx, one pair of mesenteries attached to a siphonoglyph, and a medium first pair of metamesenteries. Further, the adult polyp displayed an unprecedented locomotion behavior in Ceriantharia that is first reported here, it can crawl under and in between the sediment.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%