Gymnonereis
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Ordo: Aciculata
Familia: Nereididae
Name
Gymnonereis Horst, 1919 – Wikispecies link – Pensoft Profile
- Gymnorhynchus Horst, 1918: 247. — Pre-occupied by Gymnorhynchus Rudolphi, 1819; Cestoda (paper cited from Pettibone 1970[1]).
- Gymnonereis Horst, 1919: 64. — Pettibone 1970[1]: 234. — Banse 1977[2]: 621–622 (in part).
Type species
Gymnonereis sibogae (Horst, 1918) by monotypy
Diagnosis
(after Hutchings and Reid 1990[3]). Body elongate, depressed, attenuated posteriorly. Prostomium with frontal margin deeply incised between bases of frontal antennae.
Eversible pharynx with jaws having cutting edge smooth or serrated, with papillae on the oral ring. Notopodia with accessory dorsal cirri attached to dorsal cirrophores in anterior region only, with prechaetal lobes and short, rounded postchaetal lobes. Median segments with dorsal cirrophores greatly elongated and highly vascularized (except in Gymnonereis crosslandi) and lacking accessory cirri. Dorsal transverse ridges present or absent. Chaetae homogomph or sesquigomph spinigers and homogomph or sesquigomph falcigers may be present. Chaetae very numerous in anterior chaetigers.
Remarks
Hutchings and Reid (1990)[3] used the term ‘sesquigomph', in a review of Australian Gymnonereidinae, to describe those chaetae that have a 3:2 ratio between the boss and opposing prong of the shaft. Such chaetae were referred to as 'slightly hemigomph' by Fauchald (1977)[4] or 'slightly heterogomph' by Hylleberg and Nateewathana (1988)[5] in their descriptions of Gymnonereis. Terminology referring to the additional dorsal (=accessory dorsal) cirrus and ventral (=double ventral) cirri follow that of both Hutchings and Reid (1990)[3] and Santos et al. (2005)[6] in the first instance but only Santos et al. (2005)[6] in the second. Finally, the parapodial projections referred to as ‘prechaetal ligules’ in both Hylleberg and Nateewathana (1988)[5] and Hutchings and Reid (1990)[3] are here termed prechaetal lobes, after Santos et al. (2005)[6], who defined notopodial projections supported by aciculae as lobes and those without aciculae as ligules and found notopodial ligulae to be absent in Gymnonereis. This definition has also been applied here to the previously-termed ‘neuropodial prechaetal ligules’, referred to here as neuropodial prechaetal lobes (Fig. 1).
Taxon Treatment
- Darbyshire, T; 2014: Intertidal and nearshore Nereididae (Annelida) of the Falkland Islands, southwestern Atlantic, including a new species of Gymnonereis ZooKeys, 427: 75-108. doi
Images
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![Figure 1. Terminology and diagrammatic representation of A a Nereidinae parapodium (modified from Hutchings and Reid 1990[3]) and B a Gymnonereidinae parapodium (modified from Hylleberg and Nateewathana 1988[5]), anterior view.](/wiki/File:Zookeys-427-075-g001.jpg)
Other References
- ↑ 1.0 1.1 Pettibone M (1970) Polychaeta Errantia of the Siboga Expedition. Part 4. Some additional polychaetes of the Polynoidae, Hesionidae, Nereidae, Goniadidae, Eunicidae, and Onuphidae, selected as new species by the late Dr. Hermann Augener with remarks on other related species. Siboga-Expeditie 24: 199–270
- ↑ Banse K (1977) Gymnonereidinae new subfamily: the Nereididae (Polychaeta) with bifid parapodial neurocirri. Journal of Natural History 11: 609–628. doi: 10.1080/00222937700770541
- ↑ 3.0 3.1 3.2 3.3 3.4 Hutchings P, Reid A (1990) The Nereididae (Polychaeta) from Australia – Gymnonereidinae sensu Fitzhugh, 1987: Australonereis, Ceratocephale, Dendronereides, Gymnonereis, Nicon, Olganereis and Websterinereis. Records of the Australian Museum 42(1): 69–100. doi: 10.3853/j.0067-1975.42.1990.107
- ↑ Fauchald K (1977) The polychaete worms. Definitions and keys to the orders, families and genera. Natural History Museum of Los Angeles County, Science Series 28: 1–188. http://www.vliz.be/imisdocs/publications/123110.pdf
- ↑ 5.0 5.1 5.2 Hylleberg J, Nateewathana A (1988) Polychaetes of Thailand. Nereididae (Part 2); Ceratocephale and Gymnonereis, with descriptions of two new species and notes on the subfamily Gymnonereidinae. Research Bulletin of the Phuket Marine Biological Centre 49: 1–20.
- ↑ 6.0 6.1 6.2 Santos C, Pleijel F, Lana P, Rouse G (2005) Phylogenetic relationships within Nereididae (Annelida: Phyllodocida). Invertebrate Systematics 19: 557–576. doi: 10.1071/IS05001
