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WoRMS taxon details
original description
(of Exogone (Parexogone) Mesnil & Caullery, 1918) Mesnil, F.; Caullery, M. (1918). Sur l'organisation et la biologie d'un Syllidien [Exogone (Parexogone, n. s. g.) hebes Webst. et Ben. var. hibernica South.] habitant un sable compact. <em>Bulletin de la Société Zoologique de France.</em> 42: 126-132., available online at http://www.biodiversitylibrary.org/part/29711#/summary [details]
original description
(of Exogonella Hartman, 1961) Hartman, Olga. (1961). Polychaetous annelids from California. <em>Allan Hancock Pacific Expeditions.</em> 25: 1-226., available online at https://biodiversitylibrary.org/page/5214802
page(s): 74 [details]
redescription
Aguado, M.T.; San Martín, G. (2008). Re-description of some enigmatic genera of Syllidae (Phyllodocida: Polychaeta). Journal of the Marine Biological Association of the United Kingdom. 88(01): 35-56., available online at http://dx.doi.org/10.1017/S002531540800026X
page(s): 51-52 [details]
status source
Böggemann, Markus; Westheide, Wilfried. (2004). Interstitial Syllidae (Annelida: Polychaeta) from Mahé (Seychelles). <em>Journal of Natural History.</em> 38(4): 403-446., available online at https://doi.org/10.1080/0022293021000033229
page(s): 432 [raised to genus rank] [details] Available for editors  [request]
 Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis [ San Martin (2005) & Agudao & San Martin (2008) ] Body small, meiofaunal, surface smooth. Prostomium with three antennae; usually four eyes, sometimes also with two eye spots. Palps well developed, completely fused to each other or with terminal notch. Single pair of minute tentacular cirri. Dorsal cirri usually small, papilliform to oval, present on all segments or absent on chaetiger 2 in adults of some species. Compound chaetae with heterogomph articulations, falcigers all similar in shape and blade length, sometimes pseudospinigers with simple shaft tips, blades relatively similar to falcigers but longer. Dorsal simple chaetae similar throughout body, tips unidentate or bidentate, with both teeth similar. Ventral simple chaetae on posterior parapodia. Two usually long anal cirri present. Pharynx with anterior margin surrounded by soft lobes, with anterior tooth. Mature females carrying eggs ventrally, developing to embryos and juveniles, lacking capillary notochaetae (natatory chaetae); mature males with long natatory chaetae; some species viviparous
[details]
Status Parexogone raised from subgenus to genus by Böggemann & Westheide (2004), because (p.433) of differences from Exogone in heterogomph falcigers and supra-acicular simple chaetae plus "a different reproductive mode" (mode unstated but in Aguado et al (2008) stated that females carry progeny ventrally with some species viviparous.)
[details]
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