WoRMS name details

Gellius carduus var. magellanica Ridley & Dendy, 1886

195490  (urn:lsid:marinespecies.org:taxname:195490)

 unaccepted (genus transfer)
Variety
marine, brackish, fresh, terrestrial
recent only
Ridley, S.O.; Dendy, A. (1886). Preliminary report on the Monaxonida collected by H.M.S. Challenger. Part I. <em>Annals and Magazine of Natural History.</em> 18: 325-351, 470-493.
page(s): 333 [details]  OpenAccess publication 

Ridley, S.O.; Dendy, A. (1887). Report on the Monaxonida collected by H.M.S. 'Challenger' during the years 1873-76. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 20 (part 59): i-lxviii, 1-275, pl. 1-51, 1 map., available online at http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-59/README.htm
page(s): 40 [details]  OpenAccess publication 
Holotype  BMNH 1887.5.2.256, geounit Channels and...  
Holotype BMNH 1887.5.2.256, geounit Channels and Fjords of Southern Chile [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. Gellius carduus var. magellanica Ridley & Dendy, 1886. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=195490 on 2024-03-19
Date
action
by
2005-12-18 15:00:44Z
created
2008-01-04 10:22:14Z
changed
2018-01-18 16:17:24Z
changed

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


original description Ridley, S.O.; Dendy, A. (1886). Preliminary report on the Monaxonida collected by H.M.S. Challenger. Part I. <em>Annals and Magazine of Natural History.</em> 18: 325-351, 470-493.
page(s): 333 [details]  OpenAccess publication 

original description Ridley, S.O.; Dendy, A. (1887). Report on the Monaxonida collected by H.M.S. 'Challenger' during the years 1873-76. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 20 (part 59): i-lxviii, 1-275, pl. 1-51, 1 map., available online at http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-59/README.htm
page(s): 40 [details]  OpenAccess publication 
 
 Present  Present in aphia/obis/gbif/idigbio   Inaccurate  Introduced: alien  Containing type locality 
   

Holotype BMNH 1887.5.2.256, geounit Channels and Fjords of Southern Chile [details]
From editor or global species database
Synonymy The variety was described by Ridley & Dendy from Strait Magellan, Challenger Expd. Stat. 311, 52.7582°S 73.7667°W, depth 448 m (wet holotype specimen BMNH 1887.5.2.256). It differed from the typical variety described as Gellius carduus by Ridley & Dendy from Crozet Islands Challenger Exped. Stat. 148a, 46.8833°S 51.8667°E, depth 439–1006 m, and nearby Prince Edward Islands, syntypes BMNH 1887.5.2.254, 258 and 263) in habitus (oval massive vs leaf-shaped), oxea shape (true oxeas vs strongylote oxeas), and oxea size (490 vs. 600 μm). Burton (1932: 274), treating sponges from the Falkland Islands and Magellan region synonymized the two varieties and included Gellius laevis Ridley & Dendy, 1886 into an extended species Gellius carduus (as Adocia). For the combined species Burton cited oxea lengths varying between 300 and 450 μm, clearly in contrast with Ridley & Dendy’s oxea length of 600 μm for the types of Gellius carduus, but conforming to the length of G. carduus var. magellanica. In a following comparison with Gellius glacialis Ridley & Dendy (1886) on the next page (Burton, 1932: 275) he provided a new oxea length range for G. carduus as 490–600 μm, and this compares rather closely with oxeas of G. glacialis (530–650 μm). Burton ‘suspected’ that G. carduus belongs to G. glacialis, but the size of the sigmas of the latter (146 μm) precluded this synonymization. Van Soest (2024: 35) did not believe Burton’s (1932) treatment of the Challenger Gellius specimens is accurate. The species within the genus Gellius (currently a subgenus of Haliclona) are subtly different in the shapes and sizes of megascleres and microscleres. Construing that specimens of Gellius may have widely variable lengths and shapes in these skeletal features undermines the taxonomic framework of recognizing species. The fact that the spicule shape and size of his Falkland region material conforms closely with Gellius carduus var. magellanica, and not with the type material of G. carduus appears to show that the two varieties from their distant localities are probably distinct taxa. Confirmation by molecular sequence data may be necessary, but for the time being Van Soest proposed to distinguish the Southern South American populations (Falkland Islands, Shag Rock, South Shetland Islands) as a distinct subspecies Haliclona (Gellius) carduus subsp. magellanica (Ridley & Dendy, 1886). [details]