Orbinia Quatrefages 1866

• Main Author: Blake, James A.
• Format: Text
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Orbiniidae; Orbinia; Antarctic; Southern Ocean; The Antarctic; Antarctic Peninsula; South Shetland Islands; Pacific; Argentina; Bingham; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5281/zenodo.4901799; https://zenodo.org/record/4901799

Genus Orbinia Quatrefages, 1866 Aricia Savigny, 1820: 12, 35–36. Preoccupied. Type-species: A. sertulata Savigny, 1820, by monotypy. Orbinia Quatrefages, 1866: 288. Type-species: Aricia cuvieri Audouin & Milne-Edwards, 1833 ( = Aricia sertulata Savigny), designated by Hartman 1942. Diagnosis. Prostomium conical, pointed; peristomium with 1 achaetous ring. Branchiae from thoracic setigers (5– 20). Posterior thoracic segments with postsetal lobes (2–many) and subpodial lobes (3–many), usually forming ventral encircling fringe of 5 or more lobes. Thoracic neurosetae including blunt uncini, crenulated capillaries and rarely subuluncini; heavy spear-like or brush-tipped spines absent. Abdominal neuropodia with flail setae. Remarks. Species having a modified posterior thoracic region with spearlike spines are referred to the genus Phylo Kinberg in accordance with Hartman (1957) and Day (1973). Species of Phylo are, however, closely related to Orbinia species in overall morphology and are often treated as a subgenus of Orbinia. Results of recent molecular analyses (Bleidorn 2005; Bleidorn et al . 2009) confirm these findings. To date, 20 species and subspecies of Orbinia sensu stricto are known with two new species recently described from offshore Brazil (Leão & Santos 2016). Most have branchiae from setiger 5–7, while a small group of three species have branchiae from setiger 8 or more posteriorly. A fourth species, belonging to the latter group has been discovered from intertidal sand sediments in Argentina. A single specimen of a species with branchiae from setiger 6 has been found in the South Shetland Islands on the Antarctic Peninsula and may represent another undescribed species. This specimen is described, but not named here due to the lack of sufficient material. : Published as part of Blake, James A., 2017, Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America, pp. 1-145 in Zootaxa 4218 (1) on page 86, DOI: 10.5281/zenodo.245827 : {"references": ["Quatrefages, A. De. (1866) Histoire naturelle des Annelides marines et d'eau douce. Annelides et Gephyriens. Librarie Encylopedique de Roret, Paris, 2, 1 - 336.", "Savigny, J. C. (1820) Systeme des Annelides, principalement de celles des cotes de l'Egypte et de la Syrie, offrant les caracteres tant distinctifs que natureles des orders, families et genres, avec la description de especes. Description de l'Egypte. Historie naturelle, Paris, 1 (3), 1 - 128.", "Audouin, J. V. & Milne-Edwards, H. (1833) Classification des Annelides et descriptions de celles qui habitent les cotes de la France. Annales des Sciences Naturelles Paris, series, 1, 29, 388 - 412.", "Hartman, O. (1942) A review of the types of polychaetous annelids at the Peabody Museum of Natural History, Yale University. Bulletin of the Bingham Oceanographic Collections, 8, 1 - 98.", "Hartman, O. (1957) Orbiniidae, Apistobranchidae, Paraonidae and Longosomidae. Allan Hancock Pacific Expeditions, 15 (3), 211 - 393, plates 20 - 44, 1 chart.", "Day, J. H. (1973) New Polychaeta from Beaufort, with a key to all species recorded from North Carolina. NOAA Technical Report, National Marine Fisheries Circular, 375, 1 - 140.", "Bleidorn, C. (2005) Phylogenetic relationships and evolution of Orbiniidae (Annelida, Polychaeta) based on molecular data. Zoological Journal of the Linnean Society, 144, 59 - 73.", "Bleidorn, C. Hill, N., Erseus, C. & Tiedemann, R. (2009) On the role of character loss in orbiniid phylogeny (Annelida): Molecules vs. Morphology. Molecular Phylogenetics and Evolution, 52, 57 - 69.", "Leao, L. S. D. & Santos, C. S. G (2016) Orbinia (Polychaeta: Orbiniidae) from the Brazilian coast: two new species and two new records. Zootaxa, 4105 (2), 145 - 158. http: // dx. doi. org / 10.11646 / zootaxa. 4105.2.3"]}