Description and ecology of a new species of<i>Edwardsia</i>de Quatrefages, 1842 (Anthozoa, Actiniaria) from the St Lucia Estuary, South Africa

Daly, Marymegan; Perissinotto, Renzo; Laird, M.; Dyer, David C.; Todaro, M. Antonio

doi:10.1080/17451000.2011.617757

Cited by 17 publications

(17 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Edwardsiella lineata and the edwardsiid Nematostella vectensis Stephenson 1935 are able to reproduce asexually via transverse fission [29]; this can lead to large numbers of coincident individuals. Even edwardsiids that are not known to undergo asexual reproduction can achieve high densities, through high recruitment, low dispersal, or unrecognized asexual reproduction: Edwardsia meridionalis occurs at densities in excess of 10,000 individuals per square meter in waters 20-65 m deep in Antarctica (Cape Bird, New Harbor, and the jetty off McMurdo Station: [8]) and Edwardsia isimangaliso Daly et al 2012 and Edwardsia elegans Verrill 1869 can achieve densities in the tens to hundreds of individuals per meter [4], (MD pers obs). Although not testable with the present material, these alternatives can be distinguished because they predict different population genetics and demography: Low larval dispersal or high larval recruitment would lead to genetically heterogeneous populations of individuals at many sizes or developmental stages, whereas asexual reproduction would lead to genetically homogenous populations of individuals of the same size or developmental stage.…”

Section: Discussionmentioning

confidence: 99%

Edwardsiella andrillae, a New Species of Sea Anemone from Antarctic Ice

2013

Self Cite

View full text Add to dashboard Cite

Exploration of the lower surface of the Ross Ice Shelf in Antarctica by the Submersible Capable of under-Ice Navigation and Imaging (SCINI) remotely operated vehicle discovered a new species of sea anemone living in this previously undocumented ecosystem. This discovery was a significant outcome of the Coulman High Project’s geophysical and environmental fieldwork in 2010-2011 as part of the ANDRILL (ANtarctic geologic DRILLing) program. Edwardsiella andrillae n. sp., lives with most of its column in the ice shelf, with only the tentacle crown extending into the seawater below. In addition to being the only Antarctic representative of the genus, Edwardsiella andrillae is distinguished from all other species of the genus in the number of tentacles and in the size and distribution of cnidae. The anatomy and histology of Edwardsiella andrillae present no features that explain how this animal withstands the challenges of life in such an unusual habitat.

show abstract

Section: Discussionmentioning

confidence: 99%

Edwardsiella andrillae, a New Species of Sea Anemone from Antarctic Ice

2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…We report here on two interesting Neogosseidae found during an ongoing survey of the meiofauna and macrobenthos of the iSimangaliso Wetland Park (Pillay and Perissinotto 2009, Todaro et al 2011, Bownes and Perissinotto 2012, Daly et al 2012, Gómez et al 2012). One species belongs to the genus Neogossea Remane, 1927 and is reported here for the first time outside of its Brazilian type locality, whereas the second appears to be new to science.…”

Section: Introductionmentioning

confidence: 98%

Neogosseidae (Gastrotricha, Chaetonotida) from the iSimangaliso Wetland Park, KwaZulu-Natal, South Africa

Todaro¹,

Perissinotto²,

Bownes³

2013

Self Cite

View full text Add to dashboard Cite

Among the mostly benthic gastrotrichs, the Neogosseidae (Gastrotricha, Chaetonotida) are particularly interesting from an evolutionary point of view in virtue of their planktonic lifestyle; yet, they are poorly known and uncertainties concerning morphological traits hamper accurate in-group systematics. During a recent survey of meiofauna in the iSimangaliso Wetland Park, South Africa, two species of Neogosseidae were found in a freshwater pond near Charter’s Creek on the Western Shores of Lake St Lucia. Based on morphological traits, one species has been identified as Neogossea acanthocolla, originally described from Brazil, while the other, affiliated to the genus Kijanebalola, is proposed as new to science. Using a combination of differential interference contrast and scanning electron microscopy, fine anatomical details were observed and are here discussed in a larger taxonomic framework, especially regarding Kijanebalola devestiva sp. n. Results have also provided reasons for a revision of the diagnostic traits of Kijanebalola, Neogossea and the whole Family Neogosseidae. Besides expanding awareness about the biodiversity hosted by South Africa’s first UNESCO World Heritage Site, our study will be beneficial to future phylogenetic studies of the Gastrotricha based on morphology, by allowing the selection and/or a more precise character coding of traits of phylogenetic relevance.

show abstract

“…Edwardsiids are easily distinguishable from other burrowing anemones by their distinctive mesentery arrangement of eight unpaired macrocnemes at midcolumn with microcnemes located only distally at the base of tentacles (Carlgren, 1949). Edwardsiidae Andres, 1881, is among the most speciose taxon in the Order Actiniaria with 10 genera and approximately 95 valid species (Fautin, 2016;our data) distributed worldwide from polar to tropical zones, including hypersaline environments (Daly et al, 2012) and Antarctic ice (Daly et al, 2013;Sanamyan et al, 2015), from 0-3550 m (Sanamyan and Sanamyan, 2013). Though edwardsiids may be frequently collected in biodiversity surveys, oceanographic expeditions, and ecological monitoring projects, their identification is difficult due to the high number of undescribed species, their small size and need for histological examination for specific identification, and the small number of specialists able to identify them (Daly and Ljubenkov, 2008;Gusmão et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Supplemental Material for 'Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia. (American Museum novitates, no. 3932)'

Gusmão¹,

Qu²,

Burke³

et al. 2020

American Museum of Natural History Research Library

View full text Add to dashboard Cite

Burrowing sea anemones have a simple morphology with an elongate body and a round aboral end that anchors the animal into mud, sand, or gravel, leaving only the tentacle crown exposed. Edwardsiids are easily differentiated from other burrowing sea anemones by their distinctive mesentery arrangement of eight unpaired macrocnemes at midcolumn with microcnemes restricted to the distal column at the base of the tentacles. Though edwardsiids may be frequently collected in biodiversity surveys, oceanographic expeditions, and ecological monitoring projects, their identification is particularly hampered by their small size, the need for histology, the high number of undescribed species, and the few specialists able to identify them. Scolanthus belongs to the subfamily Edwardsiinae, which is characterized by nemathybomes; it is differentiated from other members of the subfamily by having nemathybomes with basitrichs and periderm in the proximal end, at least eight microcnemes, and 16 or more tentacles in adults. The 14 valid species of Scolanthus are distributed worldwide, but only four species have been recorded from waters deeper than 100 m (S. ingolfi, 1461 m; S. nidarosiensis, 125-150 m; S. intermedius, 223 m; S. triangulus, 71-271 m). Here we describe Scolanthus shrimp, sp. nov., and S. celticus, sp. nov., the first two sea anemones recorded from the deep-sea Whittard Canyon off the coast of Ireland. We provide detailed morphological descriptions of the new species, including micro-CT scanning of

show abstract

Description and ecology of a new species ofEdwardsiade Quatrefages, 1842 (Anthozoa, Actiniaria) from the St Lucia Estuary, South Africa

Cited by 17 publications

References 20 publications

Edwardsiella andrillae, a New Species of Sea Anemone from Antarctic Ice

Edwardsiella andrillae, a New Species of Sea Anemone from Antarctic Ice

Neogosseidae (Gastrotricha, Chaetonotida) from the iSimangaliso Wetland Park, KwaZulu-Natal, South Africa

Supplemental Material for 'Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia. (American Museum novitates, no. 3932)'

Contact Info

Product

Resources

About