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Porifera name detailsStylostichon dendyi var. robustum Topsent, 1928
195647 (urn:lsid:marinespecies.org:taxname:195647)
unaccepted (genus transfer and status change)
Variety
marine,
recent only
Topsent, E. (1928). Spongiaires de l'Atlantique et de la Méditerranée provenant des croisières du Prince Albert ler de Monaco. <em>Résultats des campagnes scientifiques accomplies par le Prince Albert I. Monaco.</em> 74:1-376, pls I-XI.
page(s): 285-287 [details] 
Type locality contained in North Atlantic Lower Bathyal Province
type locality contained in North Atlantic Lower Bathyal Province [details]
Status The variety was described by Topsent from north of the Azores region, Prince Albert 1er Monaco Cruises Stat. 1420, 42.9°N...
Status The variety was described by Topsent from north of the Azores region, Prince Albert 1er Monaco Cruises Stat. 1420, 42.9°N 28.5125°W, depth 2460 m (two syntype specimens are in Monaco, MOM, with a type slide in Paris, MNHN DT 1212). The typical variety was described by Topsent (1890: 68, as Plumohalichondria, likewise from the Azores, Prince Albert 1er Monaco Cruises Stat. 247, 38.97°N 30.3389°W, depth 318 m, type specimen in Monaco with a slide in Paris, MNHN DT 918). The present variety differs in the presence of two distinct isochela categories, the larger of which is clearly more robust, and its length exceeds that of the apparently single category of the typical variety, 63–80 μm versus 46 μm in the latter. The second category of chela in the present variety is 33–38 μm, similar to that of chelae of the typical variety. Topsent also described two size categories of acanthostyles for the present variety, 335–410 μm and 190–245 μm, whereas the typical variety would have only a single category of 285 μm (Topsent 1890: 68). However, Topsent (1928: 287) admitted that he had overlooked the presence of small acanthostyles in his description of the typical variety. Still, the size of the larger acanthostyles in the present variety clearly exceeds that of the typical variety and also the thickness of the tyles is much larger, up to 40 μm in the present variety. The two varieties are almost sympatric in geographic occurrence, but differ in depth occurrence, which may possibly be responsible for the differences. Nevertheless, it appears prudent to recognize the two varieties for the time being as distinct and Van Soest (2024: 74) proposed to elevate them to valid species, to be named Phorbas dendyi (Topsent, 1890) and Phorbas robustus (Topsent, 1928). [details]
de Voogd, N.J.; Alvarez, B.; Boury-Esnault, N.; Cárdenas, P.; Díaz, M.-C.; Dohrmann, M.; Downey, R.; Goodwin, C.; Hajdu, E.; Hooper, J.N.A.; Kelly, M.; Klautau, M.; Lim, S.C.; Manconi, R.; Morrow, C.; Pinheiro, U.; Pisera, A.B.; Ríos, P.; Rützler, K.; Schönberg, C.; Turner, T.; Vacelet, J.; van Soest, R.W.M.; Xavier, J. (2024). World Porifera Database. Stylostichon dendyi var. robustum Topsent, 1928. Accessed at: https://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=195647 on 2024-04-16
Date action by
original description
Topsent, E. (1928). Spongiaires de l'Atlantique et de la Méditerranée provenant des croisières du Prince Albert ler de Monaco. <em>Résultats des campagnes scientifiques accomplies par le Prince Albert I. Monaco.</em> 74:1-376, pls I-XI.
page(s): 285-287 [details] basis of record Van Soest, R.W.M. (2024). Correcting sponge names: nomenclatural update of lower taxa level Porifera. <em>Zootaxa.</em> 5398(1): 1-122., available online at https://doi.org/10.11646/zootaxa.5398.1.1 page(s): 74 [details] Available for editors  [request]  Present Inaccurate Introduced: alien Containing type locality
Unknown type MNHN DT 1212, geounit North Atlantic Lower Bathyal Province [details]
From editor or global species database
Status The variety was described by Topsent from north of the Azores region, Prince Albert 1er Monaco Cruises Stat. 1420, 42.9°N 28.5125°W, depth 2460 m (two syntype specimens are in Monaco, MOM, with a type slide in Paris, MNHN DT 1212). The typical variety was described by Topsent (1890: 68, as Plumohalichondria, likewise from the Azores, Prince Albert 1er Monaco Cruises Stat. 247, 38.97°N 30.3389°W, depth 318 m, type specimen in Monaco with a slide in Paris, MNHN DT 918). The present variety differs in the presence of two distinct isochela categories, the larger of which is clearly more robust, and its length exceeds that of the apparently single category of the typical variety, 63–80 μm versus 46 μm in the latter. The second category of chela in the present variety is 33–38 μm, similar to that of chelae of the typical variety. Topsent also described two size categories of acanthostyles for the present variety, 335–410 μm and 190–245 μm, whereas the typical variety would have only a single category of 285 μm (Topsent 1890: 68). However, Topsent (1928: 287) admitted that he had overlooked the presence of small acanthostyles in his description of the typical variety. Still, the size of the larger acanthostyles in the present variety clearly exceeds that of the typical variety and also the thickness of the tyles is much larger, up to 40 μm in the present variety. The two varieties are almost sympatric in geographic occurrence, but differ in depth occurrence, which may possibly be responsible for the differences. Nevertheless, it appears prudent to recognize the two varieties for the time being as distinct and Van Soest (2024: 74) proposed to elevate them to valid species, to be named Phorbas dendyi (Topsent, 1890) and Phorbas robustus (Topsent, 1928). [details]
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