Nomenclature
original description
Lamarck, [J.-B. M.] de. (1818). <i>Histoire naturelle des animaux sans vertèbres</i>. Tome cinquième, 612 pp. Paris, Deterville/Verdière. , available online at http://biodiversitylibrary.org/page/12886879
page(s): 327 [as 'Amphinomae'] [details]
Taxonomy
taxonomy source
Gathof, Jerry M. (1984). Family Amphinomidae Savigny, 1818. In: Uebelacker, J.M.; Johnson, P.G. (eds). Taxonomic guide to the polychaetes of the northern Gulf of Mexico. Volume 5. Chapter Pagination: 37.1-37.12, Barry A. Vittor & Associates, Inc., Mobile, Alabama.
page(s): 37.1 [details]
Identification resource
Other
additional source
Fauchald, K. (1977). The polychaete worms, definitions and keys to the orders, families and genera. <em>Natural History Museum of Los Angeles County: Los Angeles, CA (USA), Science Series.</em> 28:1-188., available online at http://www.vliz.be/imisdocs/publications/123110.pdf [details]
biology source
Fauvel, Pierre. (1953). Annélides polychètes non pélagiques. <em>Expédition Océanographique Belge dans les eaux côtières africaines de l'Atlantique Sud (1948-1949). Résultats Scientifiques, Institut Royale des Sciences Naturelles de Belgique.</em> 4(4): 1-56., available online at https://biblio.naturalsciences.be/rbins-publications/scientific-results-of-the-belgian-oceanographic-expedition-in-african-coastal-waters-of-the-south-atlantic-1948-1949/vol-4-4-1953, https://bit.ly/2kMi712
page(s): 16-17; note: See Note on biology for a translation of Fauvel's information on epitokous chaetae in Amphinomidae [details] Available for editors
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Present
Inaccurate
Introduced: alien
Containing type locality
From editor or global species database
Authority As with many other instances in Polychaeta nomenclature there appears to be no objective reason for crediting Savigny with the Amphinomidae authorship (in the form Savigny in Lamarck, 1818). Savigny gets no mention in Lamarck's text in this context. Please read Art. 50.1.1 of the ICZN code. [details]
Biology (continued) Fauvel (1953) swimming chaetae in Amphinomidae.
In the atoque E. parvecarunculata, we find on the dorsal ramus: 1° acicular setae; 2° large glochidiate setae; 3° large smooth or serrated setae; 4° capillary setae with a rudimentary spur. On the ventral ramus: 1° acicular setae; 2° large forked bristles; 3° rare capillary bristles with a rudimentary spur. On an epitoque female, the dorsal bristles are numerous and long, and mixed with a few capillary bristles, and the ventral ramus bears numerous and very fine bristles. But, no more than in the preceding species, the large ventral forked bristles do not disappear. On the contrary, on an E. dubia Horst, from California, I find, on the dorsal ramus: harpoon bristles, large smooth bristles and very fine smooth capillary bristles, and, on the ventral ramus, a few large straight, smooth bristles, and a large bundle of long epitoque bristles; the large forked bristles have disappeared.
In Horst's specimen, the ventral oar bore a bundle of numerous fine capillary setae without spurs, and only a few rare large forked setae with a very short branch. We therefore have in this species, as in E. rullieri, an epitoky with disappearance, at the ventral oar, of the atoky setae and appearance of a large bundle of swimming setae, while in the other species, studied from this point of view, it is mainly at the dorsal oar that the swimming setae appear, without disappearance of the atoky setae, both dorsal and ventral. In other genera of the same family, individuals with long setae have often been reported, but it does not seem that epitoky has been studied specifically there.
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Biology Fauvel (1953) has a long note on swimming chaetae in Amphinomidae. Here it is in translation to English:
Remarks On The Epitoky Of The Amphinomians. The epitoky of the Nereidians, which has already given rise to so much work, is not peculiar to them. Without being pushed to as high a degree as in this family, it is no less frequent among the Syllidians and the Eunicians, who also swarm to the surface at the time of sexual maturity. Contrary to what one might believe, it is not peculiar to the Errantia alone, and is found, to varying degrees, among a certain number of Sedentaria. This phenomenon does not seem to have attracted much attention so far among the Amphinomians. However, de Saint-Joseph (1888, p. 191, pl. VIII, fig. 56) had described a Euphrosyne intermedia: "Similar in all to Euphrosyne foliosa, but having, between the dorsal setae and the ordinary ventral setae, a bundle of 20 to 30 setae as prominent as the setae are in mature Syllidians, three times finer and twice as long as the ventral setae..." According to the author's figure 56, these setae were clearly bifurcated. McIntosh (1900, p. 238) thought that this was only a simple long-set variety of E. foliosa Audouin and M. Edwards. But in 1897, Fage and Legendre found, in their pelagic fishing by light, two individuals similar to that of Saint-Joseph, also provided with a bundle of long and fine bristles. In addition, in the collection of the Baron de Saint-Joseph, they found an E. foliosa swollen with eggs in which these swimming bristles were in the process of developing. "The E. intermedia of Saint-Joseph," they added, "is therefore not a variety of foliosa, but its epitoque form." From Alexandria (1937, p. 12), I also had in my hands an epitoque E. foliosa with long ventral bristles corresponding to the E. intermedia. Fage and Legendre, after having provided proof of the epitoqueness of the E. foliosa, have pointed out that other species of the same genus, from the "Siboga" Expedition, characterized by their large eyes and long setae, "are very probably epitoque forms". I found these same fine swimming setae on E. pilosa Horst and E. myrtosa Savigny collected by Dantan during light fishing in the Gulf of Tadjourah (Fauvel, 1951, p. 290). As for the Eurythoë, all those who have handled numerous specimens of E. complanata, so common in all coral reefs, have noticed large differences in the length of the setae depending on the specimens. These differences have sometimes been attributed to sexual dimorphism. Augener (1916, pp. 90-93) noted, on E. parvecarunculata Horst, the presence of numerous and very fine simple setae with the ventral oar, and attributes them to the epitoquia. On specimens of the same species, also from Cameroon (1927, p. 526), I made the same observation. To elucidate this question, I re-examined my numerous preparations of parapodia of Eurythoë from various sources. On E. complanata I normally find, on the dorsal ramus: 1° large harpoon-shaped setae (glochidial setae); 2° large straight setae, smooth or denticulate; 3° capillary setae, few in number, with a fairly marked spur; 4° acicular setae. On the ventral ramus: 1° large forked setae with unequal branches; 2° acicular setae, no capillary setae. But, in some specimens, the dorsal capillary setae are longer and more numerous, and capillary setae similar to those of the dorsal ramus begin to mix with the ventral forked setae. At a more advanced stage, the dorsal capillary setae are very long and much more numerous than on the ventral ramus, but they differ from the atoque setae only by their length and the reduction of the small lateral spur. In this species, it is therefore rather on the dorsal ramus that epitoque setae abound, which are lacking, or remain relatively rare, on the ventral ramus. (continued next note)
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