WoRMS taxon details

Gambierdiscus cheloniae K.F.Smith, L.Rhodes & S.A.Murray, 2016

889873  (urn:lsid:marinespecies.org:taxname:889873)

accepted
Species
marine, brackish, fresh, terrestrial
recent only
Smith, K. F.; Rhodes, L.; Verma, A.; Curley, B. G.; Harwood, D.; Kohli, G. S.; Solomona, D.; Rongo, T.; Munday, R.; Murray, S. A. (2016). A new Gambierdiscus species (Dinophyceae) from Rarotonga, Cook Islands: Gambierdiscus cheloniae sp. nov. <em>Harmful Algae.</em> 60: 45-56., available online at https://doi.org/10.1016/j.hal.2016.10.006 [details]  Available for editors  PDF available [request] 
Note HOLOTYPE: Fig. 2E; SEM stub 375 (isolate...  
Type locality HOLOTYPE: Fig. 2E; SEM stub 375 (isolate CAWD232) is held at Cawthron Institute, Nelson, New Zealand. The isolate was obtained from western Rarotonga, Cook Islands in 2014. Living cultures of G. cheloniae (CAWD232 and 236) are maintained in the CICCM. ISOTYPES: Fig. 2A–D and F–H, stubs 375 and 307 (CAWD232) and stub 511 (CAWD236), held at Cawthron Institute. [details]
Description The photosynthetic cells of G. cheloniae are anteroposteriorly compressed, with mean depth (ventral to dorsal distance)...  
Description The photosynthetic cells of G. cheloniae are anteroposteriorly compressed, with mean depth (ventral to dorsal distance) measuring 59.5 ± 12.2 μm, width (transdiameter) 62.9 ± 9.0 μm, and length (apical to antapical axis measured in either ventral or dorsal view) 32.6 ± 3.7 μm. The cells are rugose, although exceptions of individual smooth cells (possibly recently divided) were observed by SEM. The apical pore is almost centrally placed (not markedly displaced) and the 2' plate is hatchet shaped and
averages 16.2 μm (width) by 29.3 μm (length). The round thecal pores are approximately 0.3 μm in diameter. There are two flagella. Plate formula Po, 3' , 6” or 7”, 6C?, 6 or 7S, 5'"", 1p and 2”"". In antapical view, Plate 1p averages 16.2 μm (width) by 30.0 μm (length). It is slightly broader at the ventral end, which is pointed. The cingulum displays a pronounced list. [details]
Guiry, M.D. & Guiry, G.M. (2024). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Gambierdiscus cheloniae K.F.Smith, L.Rhodes & S.A.Murray, 2016. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=889873 on 2024-03-28
Date
action
by
2016-11-29 09:12:17Z
created

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original description Smith, K. F.; Rhodes, L.; Verma, A.; Curley, B. G.; Harwood, D.; Kohli, G. S.; Solomona, D.; Rongo, T.; Munday, R.; Murray, S. A. (2016). A new Gambierdiscus species (Dinophyceae) from Rarotonga, Cook Islands: Gambierdiscus cheloniae sp. nov. <em>Harmful Algae.</em> 60: 45-56., available online at https://doi.org/10.1016/j.hal.2016.10.006 [details]  Available for editors  PDF available [request] 
 
 Present  Present in aphia/obis/gbif/idigbio   Inaccurate  Introduced: alien  Containing type locality 
   

From editor or global species database
Type locality HOLOTYPE: Fig. 2E; SEM stub 375 (isolate CAWD232) is held at Cawthron Institute, Nelson, New Zealand. The isolate was obtained from western Rarotonga, Cook Islands in 2014. Living cultures of G. cheloniae (CAWD232 and 236) are maintained in the CICCM. ISOTYPES: Fig. 2A–D and F–H, stubs 375 and 307 (CAWD232) and stub 511 (CAWD236), held at Cawthron Institute. [details]

From regional or thematic species database
Description The photosynthetic cells of G. cheloniae are anteroposteriorly compressed, with mean depth (ventral to dorsal distance) measuring 59.5 ± 12.2 μm, width (transdiameter) 62.9 ± 9.0 μm, and length (apical to antapical axis measured in either ventral or dorsal view) 32.6 ± 3.7 μm. The cells are rugose, although exceptions of individual smooth cells (possibly recently divided) were observed by SEM. The apical pore is almost centrally placed (not markedly displaced) and the 2' plate is hatchet shaped and
averages 16.2 μm (width) by 29.3 μm (length). The round thecal pores are approximately 0.3 μm in diameter. There are two flagella. Plate formula Po, 3' , 6” or 7”, 6C?, 6 or 7S, 5'"", 1p and 2”"". In antapical view, Plate 1p averages 16.2 μm (width) by 30.0 μm (length). It is slightly broader at the ventral end, which is pointed. The cingulum displays a pronounced list. [details]

Harmful effect G. cheloniae produced the putative maitotoxin-3 analogue, MTX-3, but neither maitotoxin
or monitored ciguatoxin. Extracts of G. cheloniae were shown to be highly toxic to mice by intraperitoneal (i.p.) injection, although they were less toxic by gavage. It is possible that this species produces toxins other than putative MTX-3. See Smith et al. (2016).  [details]

Identification This new species is morphologically similar to G. belizeanus and falls within the Gambierdiscus species clade V, but is genetically distinct.  [details]