Chaetozone Malmgren 1867

• Main Author: Blake, James A.
• Format: Text
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Cirratulidae; Chaetozone; Arctic; Antarctic; Southern Ocean; The Antarctic; Antarctic Peninsula; Weddell Sea; Pacific; Weddell; Elephant Island; Malmgren; Noto; Rivero; Antarc*; Antarctica; Antarktis*; Northeast Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.3798536; https://zenodo.org/record/3798536

Genus Chaetozone Malmgren, 1867 Type species: Chaetozone setosa Malmgren, 1867, by monotypy. Diagnosis. (Emended, after Blake 2015). Prostomium blunt to conical, peristomium elongate to short, usually lacking eyespots, with a pair of small nuchal slits or depressions at posterior edge; with a single pair of grooved dorsal tentacles arising from posterior edge of peristomium, or sometimes more posterior on an asetigerous anterior segment, or rarely on an anterior setiger. First pair of branchiae arising from an achaetous segment or first setiger; sometimes with first two pairs of branchiae on a single anterior segment. Body usually expanded anteriorly and narrowed posteriorly, rarely with middle or posterior body segments beaded or moniliform; posterior end often expanded. Setae include capillaries on most setigers and sigmoid acicular spines in neuropodia and notopodia, with spines typically concentrated in posterior segments forming distinct cinctures with spines carried on elevated membranes; cinctures with few to many spines sometimes encircling entire posterior end, accompanied with none to many alternating capillaries; bidentate spines sometimes present in juveniles or occasionally in ventral-most position of far posterior setigers of adults, accompanying unidentate spines in cinctures; some species with long, natatory-like capillary notosetae, sometimes limited to gravid individuals. Pygidium a simple lobe, disk-like, or with long, terminal cirrus. Remarks . Blake (2015) emended the genus Chaetozone , described the lectotype of C. setosa , added eight new species, and reviewed more than 20 species from North America. He effectively limited the genus to species having numerous elongate acicular spines in both noto- and neuropodia that form a prominent and conspicuous armature in modified parapodia of posterior segments. A few other species having few or inconspicuous spines, or spines limited to the neuropodia, are here referred to the genus Chaetocirratulus n. gen. (see above). Species of Chaetozone from Antarctica that agree with the definition presented here have historically been referred to the type-species, C. setosa by Hartman (1967, 1978) and Hartmann-Schröder & Rosenfeldt (1989, 1990). With the recent redescription and restriction of the range of C. setosa to the Arctic (Chambers 2000; Blake 2015) and description of numerous new species from worldwide locations, many of which were formerly referred to C. setosa (Blake 1996, 2006, 2015; Doner & Blake 2006; Dean & Blake 2007; Magalhães & Bailey Brock 2013; Elías et al . 2017, and others) it is apparent that the Antarctic species of Chaetozone remain poorly known. In the present study, five species of Chaetozone are reported from western South America, two new and seven species are reported from Antarctica, five new. Two species of Caulleriella, C. bransfieldensis , and C. homosetosus described by Hartmann-Schröder & Rosenfeldt (1989) from the Antarctic Peninsula are here referred to Chaetozone . : Published as part of Blake, James A., 2018, Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R / V Anton Bruun, USNS Eltanin, USCG Glacier, R / V Hero, RVIB Nathaniel B. Palmer, and R / V Polarstern from the Southern Ocean, Antarctica, and off Western South America, pp. 1-130 in Zootaxa 4537 (1) on pages 69-71, DOI: 10.11646/zootaxa.4537.1.1, http://zenodo.org/record/3771214 : {"references": ["Malmgren, A. J. (1867) Annulata Polychaeta Spetsbergiae, Groenlandiae, Islandiae et Scandinaviae hactenus cognita. Ofversigt af Kongliga Vetenskaps-Akademien Forhandlingar, 24, 127 - 235.", "Hartman, O. (1967) Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic seas. Allan Hancock Monographs in Marine Biology, 2, 1 - 387, 51 pls.", "Hartman, O. (1978) Polychaeta from the Weddell Sea Quadrant, Antarctica. In: Antarctic Research Series. 26 (4). American Geophysical Union, Washington, D. C., 125 - 223, 42 figs.", "Hartmann-Schroder, G. & Rosenfeldt, P. (1989) Die Polychaeten der \" Polarstern \" - Reise ANT III / 2 in die Antarktis 1984. Teil 2: Cirratulidae bis Serpulidae. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 86, 65 - 106.", "Hartmann-Schroder, G. & Rosenfeldt, P. (1990) Die Polychaeten der \" Walther Herwig \" - Reise 68 / 1 nach Elephant Island (Antarktis) 1985 Teil 1: Aphroditidae bis Cirratulidae. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, Supplement, 87, 89 - 122.", "Chambers, S. J. (2000) A redescription of Chaetozone setosa Malmgren, 1867 including a definition of the genus, and a description of a new species of Chaetozone (Polychaeta: Cirratulidae) from the northeast Atlantic. Bulletin of Marine Science, 67, 587 - 596.", "Blake, J. A. (1996) Chapter 8. Family Cirratulidae. In: Blake, J. A., Hilbig, B. & Scott, P. H. (Eds.), Taxonomic Atlas of the Santa Maria Basin and Western Santa Barbara Channel. Vol. 6. Annelida Part 3. Polychaeta: Orbiniidae to Cossuridae. Santa Barbara Museum of Natural History, Santa Barbara, pp. 263 - 384.", "Doner, S. A. & Blake, J. A. (2006) New species of Cirratulidae (Polychaeta) from the northeastern United States. Scientia Marina, 70 (Supplement 3), 65 - 73.", "Dean, H. K. & Blake, J. A. (2007) Chaetozone and Caulleriella (Polychaeta: Cirratulidae) from the Pacific Coast of Costa Rica, with description of eight new species. Zootaxa, 1451, 41 - 68.", "Elias, R, Rivero, M. S. & Orensanz, J. M. L. (2017) New species of Monticellina and Chaetozone (Polychaeta: Cirratulidae) in the SW Atlantic, and a review of Monticellina species. Journal of the Marine Biological Association of the United Kingdom, 97 (7), 1553 - 1563. https: // doi. org / 10.1017 / S 0025315416000771"]}