Taxonomy and ecological aspects of the subarctic sea anemones<i>Hormathia Digitata, Hormathia Nodosa</i>and<i>Allantactis parasitica</i>(Coelenterata, Actiniaria)

Riemann-Zürneck, Karin

doi:10.1080/00785326.1994.10429544

Cited by 14 publications

(6 citation statements)

References 7 publications

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“…“cuticle”, “tubercles”, or “suckers”) for generic and specific taxonomy, and the significant level of intraspecific variation seen in groups such as Sagartiidae and Hormathiidae (e.g. Stephenson, 1935; Riemann‐Zürneck, 1986, 1994). Specimen‐level taxonomic revision is required for all groups within Metridioidea to interpret intraspecific variation, to test the homology of broadly defined features, and to identify more consistent, effective features for identification and classification.…”

Section: Discussionmentioning

confidence: 99%

Toward a natural classification: phylogeny of acontiate sea anemones (Cnidaria, Anthozoa, Actiniaria)

et al. 2012

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Acontia-nematocyst-dense, thread-like extensions of the mesenterial filaments-are the characteristic feature of the actiniarian group Acontiaria. Phylogenetic analyses have shown that acontiate taxa form a clade that also includes some taxa without acontia. We analyse five molecular markers from 85 actiniarians to explore the phylogenetic relationships among families in Acontiaria, including acontiate species assigned to other higher taxa and species without acontia that have been allied to Acontiaria. Based on our results, we redefine the group to accommodate those lineages that have lost acontia, and formalize it as superfamily Metridioidea. Based on stable and well supported clades, we resurrect Phelliidae and Amphianthidae, redefine Kadosactinidae and Actinoscyphiidae, and move two species to new genera: that previously termed Sagartiogeton erythraios belongs in Jasonactis gen. nov.; and that previously termed Anthosactis pearseae belongs in Ostiactis gen. nov., type genus of Ostiactinidae fam. nov. We also synonymized Halcampoididae and Halcampidae (as Halcampidae) and Andvakiidae and Isophelliidae (as Andvakiidae). The results of our phylogenetic analyses indicate that the diagnostic morphological characters used in the family-level taxonomy of acontiate actiniarians such as the nematocysts of the acontia, the marginal sphincter muscle, and mesenteries divisible into macro-and microcnemes, have to be revisited, as these features are highly homoplasious.

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Section: Discussionmentioning

confidence: 99%

Toward a natural classification: phylogeny of acontiate sea anemones (Cnidaria, Anthozoa, Actiniaria)

et al. 2012

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“…There are no cinclides, and there are never more than 96 tentacles (without thickenings on their aboral side),nor a cup-like pedal disc (Carlgren 1949;Manuel 1988;Tur 1993). Despite these characteristics, the variability between Hormathia species is high (Stephenson 1935;Riemann-Zürneck 1973, 1994Grebelnyi 1980aGrebelnyi , 1980b. Thus, the description of diagnostic characters for identifying the species ascribed to this genus have not been always satisfactory, resulting in many synonyms in the literature (see for example synonyms for H. lacunifera given by Fautin-Dunn 1983: 50).…”

Section: Introductionmentioning

confidence: 99%

A new species of Hormathia (Actiniaria, Hormathiidae) from the eastern Weddell Sea, Antarctica

Rodríguez

López–González

2001

Helgoland Marine Research

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A new species of sea anemone in the genus Hormathia, is described and illustrated based on fortytwo specimens collected during the Polarstern cruises ANT XV/3 and ANT XVII/3 in the Weddell Sea. The main features of the new taxon are the crown of flattened and hooked tubercles at the distal end of the scapus, the regular arrangement of pointed tubercles along the column and the cnidom. The new species shares the pointed tubercles, at least in the upper part of the scapus, with two other species of Hormathia in the southern hemisphere: Hormathia spinosa Hertwig 1882 and H. pectinata Hertwig 1882

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“…The dominance of D. florida particularly at Bekkarfjorden 2 indicates that the genus is specialized to colonize highly mixed hard substrates and to thrive in faster current velocities (in our study, 0.05 m s −1 ). The boreal sea anemone (H. digitata) is a common species in depths between 10-1000 m in Arctic and sub-Arctic waters (Riemann-Zürneck, 1994;Sirenko et al, 2004) and has been found to be associated with areas of silt to very fine sand (Callaway et al, 2002). In this study, H. digitata was observed to be particularly common on the flat gravel and gravelly sand substrates at Lerresfjorden and often in association with the marine gastropod N. despecta.…”

Section: Sponge Ground Communities and Substrate Associationmentioning

confidence: 51%

Epifaunal Habitat Associations on Mixed and Hard Bottom Substrates in Coastal Waters of Northern Norway

et al. 2020

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Hard and mixed seafloor substrates are an important benthic habitat in coastal northern Norway and they are known to be colonized by relatively diverse communities of sessile epifauna. These assemblages are highly susceptible to physical damage and stresses imposed by organic material from industrial and municipal sources. However, despite increasing prevalence of stressors, the diversity and distribution of benthic substrates and biological communities in coastal Arctic and sub-Arctic regions remain poorly documented. In response, this study has characterized the composition of mixed and hard bottom substrates and associated sessile epifauna in fjords in Finnmark, northern Norway, using remote sensing and an innovation low-cost towed camera method. The study fjords supported a dense covering (0.1 to 0.68 individuals m–2) of sponge taxa common to deep-water ostur sponge habitats (Geodia sp., Mycale lingua, Polymastia sp., Phakellia ventilabrum, and Axinella infundibuliformis). In addition, aggregations of the soft coral (Duva florida), the tunicate (Ascidia sp.), the seastar (Ceramaster granularis) and anemone (Hormathia digitata) were prominent fauna. The small-scale spatial patterns of the epifaunal communities in this study were primarily influenced by the local hydrodynamic regime, depth, the topographical slope and the presence of hard bedrock substrates. This description of the composition, distribution and the identification of environmental drivers of epibenthic communities is valuable for the development of predictive habitat models to manage the benthic impact of multiple stressor on these ecological valuable and vulnerable Arctic habitats.

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Taxonomy and ecological aspects of the subarctic sea anemonesHormathia Digitata, Hormathia NodosaandAllantactis parasitica(Coelenterata, Actiniaria)

Cited by 14 publications

References 7 publications

Toward a natural classification: phylogeny of acontiate sea anemones (Cnidaria, Anthozoa, Actiniaria)

Toward a natural classification: phylogeny of acontiate sea anemones (Cnidaria, Anthozoa, Actiniaria)

A new species of Hormathia (Actiniaria, Hormathiidae) from the eastern Weddell Sea, Antarctica

Epifaunal Habitat Associations on Mixed and Hard Bottom Substrates in Coastal Waters of Northern Norway

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