Ophiactis quinqueradia
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Ordo: Ophiurida
Familia: Ophiactidae
Genus: Ophiactis
Name
Ophiactis quinqueradia Ljungman, 1872 – Wikispecies link – Pensoft Profile
Description
Five arms. Disk circular to pentagonal (dd = 2.48 to 7.62 mm). Covered by imbricating scales of irregular sizes. Scales at center of disk smaller, the largest on interradial field and mainly on lateral margins of radial shields (Fig. 8a). Sparsely distributed small spines on aboral region of disk. Radial shields long and separated over almost full length by three long scales (Fig. 8f). Ventral interradius covered by small spines on small and imbricating scales (Fig. 8b). Bursal slits long and wide. Oral shields long, diamond-shaped, proximally enlarged and distally narrow (Fig. 8c). Adoral shields large, laterally wide. Two or three small, spatulate, oral papillae, distal papilla broader and proximal papilla slightly curved towards the interior of the mouth (Fig. 8c). Dorsal arm plate wider than long, rectangular, with proximal margin rounded (Fig. 8d). Ventral arm plate hexagonal (Fig. 8e). Five or seven serrated arm spines, with a crown of denticles at tip. First dorsal spine small, second largest, and remaining decrease in size in the ventral direction. Single tentacle scale spatulate (Fig. 8e).
Distribution
The Bahamas, the islands off southern Florida, off Mississippi, Texas offshore reefs, the Antilles, Mexican Caribbean, Cuba, Belize, Panama, and Brazil (Hendler et al. 1995[1], Durán-Gonzáles et al. 2005[2], Hernández-Herrejón et al. 2008[3]). In Brazil from Maranhão, Ceará, Rio Grande do Norte, Pernambuco, Alagoas (Albuquerque 1986[4], Gondim et al. in press[5]), and Espírito Santo (Tommasi 1970[6]). This is the first record for the State of Paraíba. Intertidal to 640 m. Recorded between 11 and 34 m in the present study.
Remarks
This species lives on bottoms of mud, sand, gravel or corals, being very common in sponges (Tommasi 1970[6]). According to Hendler et al. (1995)[1], it is an endocommensal of sponges. In Cuba, concentrations of 200 to 300 individuals of Ophiactis quinqueradia were recorded as endocommensal of sponges Agelas sp. (Abreu-Pérez et al. 2005[7]), Verongia lacunosa (Lamarck, 1816) and Neofibularia notitangere (Duchassaing and Michelotti, 1864) (Hopkins et al. 1977[8], Kissling and Taylor 1977[9], Hendler 1984[10]). In the examined specimens a dorsal arm plate was sometimes subdivided into two or three small plates of irregular shapes.
Taxon Treatment
- Gondim, A; Alonso, C; Dias, T; Manso, C; Christoffersen, M; 2013: A taxonomic guide to the brittle-stars (Echinodermata, Ophiuroidea) from the State of Paraíba continental shelf, Northeastern Brazil ZooKeys, 307: 45-96. doi
Other References
- ↑ 1.0 1.1 Hendler G, Miller J, Pawson D, Kier P (1995) Sea stars, sea urchins and allies: echinoderms of Florida and the Caribbean. Smithsonian Institution Press, Washington, 390 pp.
- ↑ Durán-González A, Laguarda-Figueras A, Solís-Marín F, Sánchez B, Ahearn C, Torres-Vega J (2005) Echinoderms (Echinodermata) from the Mexican waters of the Gulf of Mexico. Revista de Biologia Tropical 53: 53-68.
- ↑ Hernandéz-Herrejón L, Solís-Marín F, Laguarda-Figueras A (2008) Ophiuroids (Echinodermata: Ophiuroidea) from the Mexican waters of the Gulf of Mexico. Revista de Biologia Tropical 56: 83-167.
- ↑ Albuquerque M (1986) Ophiuroidea Gray, 1840 (Echinodermata) da plataforma continental do norte e nordeste brasileiro. PhD thesis, São Paulo: University of São Paulo.
- ↑ Gondim A, Dias T, Manso C, Christoffersen M (in press) Annotated checklist of Echinoderms from Maranhão and Piauí States, Northeastern Brazil. Check List.
- ↑ 6.0 6.1 Tommasi L (1970) Os ofiuróides recentes do Brasil e de regiões vizinhas. Contribuições do Instituto Oceanográfico, Universidade de São Paulo Série Oceanografia Biológica 20: 1–146. doi: 10.1590/S0373-55241971000100001
- ↑ Abreu-Pérez M, Solís-Main F, Laguarda-Figueras A (2005) Catalogue of neritic-benthonic echinoderms (Echinodermata: Asteroidea and Ophiuroidea) from the Cuban Archipelago. Revista de Biologia Tropical 53: 29-52.
- ↑ Hopkins T, Blizzard D, Brawley S, Earle S, Grimm D, Gilbert D, Johnson P, Livingston E, Lutz C, Shaw J, Shaw B (1977) A preliminary characterization of the biotic components of composite strip tracts on the Florida Middlegrounds, northeastern Gulf of Mexico. In: Taylor D (Ed). , Proceedings. Third International Coral Reef Symposium, volume 1 (Biology). Rosenstiel School of Marine and Atmospheric Science, University of Miami, Florida: 31-37.
- ↑ Kissling D, Taylor G (1977) Habitat factors for reef-dwelling ophiuroids in the Florida Keys. In: Taylor D (Ed). Proceedings. Third International Coral Reef Symposium, volume 1 (Biology). Rosenstiel School of Marine and Atmospheric Science, University of Miami, Florida: 225-231.
- ↑ Hendler G (1984) The association of Ophiothrix lineata and Callyspongia vaginalis: A brittlestar-sponge cleaning symbiosis? Marine Ecology (Pubblicazioni della Stazione Zoologica di Napoli I)5: 9–27. doi: 10.1111/j.1439-0485.1984.tb00304.x
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