WoRMS taxon details
Heterocapsa circularisquama Horiguchi, 1995
233610 (urn:lsid:marinespecies.org:taxname:233610)
accepted
Species
marine
Horiguchi, T. (1995). Heterocapsa circularisquama sp. nov. (Peridiniales, Dinophyceae): A new marine dinoflagellate causing mass mortality of bivalves in Japan. <em>Phycological Research.</em> 43(3): 129-136., available online at https://doi.org/10.1111/j.1440-1835.1995.tb00016.x [details]
Type locality contained in Ago Bay
type locality contained in Ago Bay [details]
LSID urn:lsid:algaebase.org:taxname:57460
Description The cells of Heterocapsa circularisquama consist of epitheca and hypotheca which are almost equal in length. Cell size:...
LSID urn:lsid:algaebase.org:taxname:57460 [details]
Description The cells of Heterocapsa circularisquama consist of epitheca and hypotheca which are almost equal in length. Cell size:...
Description The cells of Heterocapsa circularisquama consist of epitheca and hypotheca which are almost equal in length. Cell size: 20.0-28.8 μm (X = 23.9 μm) in length, 13.8-20.0 μm = 17.3 μm) in width. The epitheca is conical, while the hypotheca is hemispheroidal in shape. The apex of the cell is often covered with a hyaline cap which is probably composed of polysaccharide. The cingulum is relatively wide and displaced by almost 1/2 of its own width. The sulcus is narrow and almost reaches the antapex of the cell. The chloroplast is single and several lobes radiate from the central pyrenoid which is lo¬cated in the hypotheca near the cingulum. The pyrenoid is spherical and is surrounded by starch sheaths. The nucleus is large and elongated and is located in the left side of the cell, occupying substantial part of both epi- and hypotheca. The red pigmented body has often been observed somewhere in the cytoplasm (not shown). No eyespot is present. The cells of H. circularisquama are covered with thin thecal plates. Due to their very thin nature, several attempts to obtain good SEM photographs to reveal plate pattern have failed. Alternatively, however, epifluorescent microscopy coupled with fluorescent brightener staining was successfully applied to analyze thecal plate arrangement. The thecal plate arrangement has been determined as: Po, cp (or x), 5', 3a, 7", 6c, 5s, 2"". Apical pore plate (Po) is circular and there is a narrow gap at the ventral side where the canal plate (cp or x) lies. The canal plate is located between the 1' and 5' plates. The apical plate series consists of 5 plates. The first apical plate is five-sided, narrow and asymmetrical. The 3' and 4' plates are almost equal in shape and in size and occupy the upper ventral part of the cell. The 2' plate is almost pentagonal, while 5' plate is six-sided and the largest in the apical plate series. The first (1a) and third (3a) apical intercalary plates are pentagonal in shape. while variations can be seen in the shape and position of the second apical intercalary plate (2a) depending on the number of precingular plates. The most common case, though not statistically confirmed, is that the 2a plate is seven-sided and in this case, the precingular series is composed of 7 plates. The other case which was sometimes observed was the 2a plate as hexagonal and this resulted when the precingular plate series consisted of only 6 plates. The cingulum consists of 6 plates, almost all equal in length. No transitional plate has been observed. The sulcus consists of 5 plates. The anterior sulcal plate (as) invades into the epitheca and its height is as high as that of plates 1" and 7". The right sulcal plate (rs) occupies a somewhat transitional position between the cingulurn and the sulcus. The left sulcal plate is divided into two pieces, the left anterior sulcal (las) and the left posterior sulcal (Ips) plates. The posterior sulcal plate (ps) is the largest of all and is narrow and scoop-shaped. In almost all of the cells, the triangular hole can be observed just below the anterior sulcal plate and is thought to be the flagellar pore. The postcingular plate series consists of 5 plates (1"' to 5" '). The antapical plate series is composed of two plates with larger 2"" and smaller 1"" plates. [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). Heterocapsa circularisquama Horiguchi, 1995. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=233610 on 2024-04-19
Date
action
by
2006-07-27 06:59:07Z
created
Camba Reu, Cibran
Copyright notice: the information originating from AlgaeBase may not be downloaded or replicated by any means, without the written permission of the copyright owner (generally AlgaeBase). Fair usage of data in scientific publications is permitted.
original description
Horiguchi, T. (1995). Heterocapsa circularisquama sp. nov. (Peridiniales, Dinophyceae): A new marine dinoflagellate causing mass mortality of bivalves in Japan. <em>Phycological Research.</em> 43(3): 129-136., available online at https://doi.org/10.1111/j.1440-1835.1995.tb00016.x [details]
basis of record Gómez, F. (2005). A list of free-living dinoflagellate species in the world's oceans. <em>Acta Bot. Croat.</em> 64(1): 129-212. [details]
additional source Guiry, M.D. & Guiry, G.M. (2023). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online at http://www.algaebase.org [details]
additional source Moestrup, Ø., Akselman, R., Cronberg, G., Elbraechter, M., Fraga, S., Halim, Y., Hansen, G., Hoppenrath, M., Larsen, J., Lundholm, N., Nguyen, L. N., Zingone, A. (Eds) (2009 onwards). IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae., available online at http://www.marinespecies.org/HAB [details]
additional source Lutaenko, K.A.; Furota, T.; Nakayama; S.; Shin, K.; Xu, J. (2013). Atlas of Marine Invasive Species in the NOWPAP Region. Beijing: NOWPAP DINRAC (Northwest Pacific Action Plan, Data and Information Network Regional Center). 189 pp. [details]
toxicology source Matsuyama Y., Uchida T., Nagai K., Ishimura M., Nishimura A., Yamaguchi M.& Honjo H. 1996. Biological and environmental aspects of noxious dinoflagellate red tides by <i>Heterocapsa circularisquama</i> in the west Japan. In: <i>Harmful and Toxic Algal Blooms</i> (Ed. by T. Yasumoto, Y. Oshima & Y. Fukuyo), pp. 247-250. IOC, UNESCO, Paris. [details]
toxicology source Matsuyama Y. 1999. Harmful effect of dinoflagellate <i>Heterocapsa circularisquama</i> on shellfish aquaculture in Japan. Jap. Agric. Res. Quart. (JARQ) 33: 283-293. [details]
ecology source Leles, S. G.; Mitra, A.; Flynn, K. J.; Tillmann, U.; Stoecker, D.; Jeong, H. J.; Burkholder, J.; Hansen, P. J.; Caron, D. A.; Glibert, P. M.; Hallegraeff, G.; Raven, J. A.; Sanders, R. W.; Zubkov, M. (2019). Sampling bias misrepresents the biogeographical significance of constitutive mixotrophs across global oceans. <em>Global Ecology and Biogeography.</em> 28(4): 418-428., available online at https://doi.org/10.1111/geb.12853 [details] Available for editors
[request]
ecology source Mitra, A.; Caron, D. A.; Faure, E.; Flynn, K. J.; Leles, S. G.; Hansen, P. J.; McManus, G. B.; Not, F.; Do Rosario Gomes, H.; Santoferrara, L. F.; Stoecker, D. K.; Tillmann, U. (2023). The Mixoplankton Database (MDB): Diversity of photo‐phago‐trophic plankton in form, function, and distribution across the global ocean. <em>Journal of Eukaryotic Microbiology.</em> 70(4)., available online at https://doi.org/10.1111/jeu.12972 [details]
ecology source Maki, T.; Imai, I. (2001). Relationships between intracellular bacteria and the bivalve killer dinoflagellate Heterocapsa circularisquama (Dinophyceae). <em>Fisheries Science.</em> 67: 794–803. [details] Available for editors [request]
basis of record Gómez, F. (2005). A list of free-living dinoflagellate species in the world's oceans. <em>Acta Bot. Croat.</em> 64(1): 129-212. [details]
additional source Guiry, M.D. & Guiry, G.M. (2023). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online at http://www.algaebase.org [details]
additional source Moestrup, Ø., Akselman, R., Cronberg, G., Elbraechter, M., Fraga, S., Halim, Y., Hansen, G., Hoppenrath, M., Larsen, J., Lundholm, N., Nguyen, L. N., Zingone, A. (Eds) (2009 onwards). IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae., available online at http://www.marinespecies.org/HAB [details]
additional source Lutaenko, K.A.; Furota, T.; Nakayama; S.; Shin, K.; Xu, J. (2013). Atlas of Marine Invasive Species in the NOWPAP Region. Beijing: NOWPAP DINRAC (Northwest Pacific Action Plan, Data and Information Network Regional Center). 189 pp. [details]
toxicology source Matsuyama Y., Uchida T., Nagai K., Ishimura M., Nishimura A., Yamaguchi M.& Honjo H. 1996. Biological and environmental aspects of noxious dinoflagellate red tides by <i>Heterocapsa circularisquama</i> in the west Japan. In: <i>Harmful and Toxic Algal Blooms</i> (Ed. by T. Yasumoto, Y. Oshima & Y. Fukuyo), pp. 247-250. IOC, UNESCO, Paris. [details]
toxicology source Matsuyama Y. 1999. Harmful effect of dinoflagellate <i>Heterocapsa circularisquama</i> on shellfish aquaculture in Japan. Jap. Agric. Res. Quart. (JARQ) 33: 283-293. [details]
ecology source Leles, S. G.; Mitra, A.; Flynn, K. J.; Tillmann, U.; Stoecker, D.; Jeong, H. J.; Burkholder, J.; Hansen, P. J.; Caron, D. A.; Glibert, P. M.; Hallegraeff, G.; Raven, J. A.; Sanders, R. W.; Zubkov, M. (2019). Sampling bias misrepresents the biogeographical significance of constitutive mixotrophs across global oceans. <em>Global Ecology and Biogeography.</em> 28(4): 418-428., available online at https://doi.org/10.1111/geb.12853 [details] Available for editors
[request] ecology source Mitra, A.; Caron, D. A.; Faure, E.; Flynn, K. J.; Leles, S. G.; Hansen, P. J.; McManus, G. B.; Not, F.; Do Rosario Gomes, H.; Santoferrara, L. F.; Stoecker, D. K.; Tillmann, U. (2023). The Mixoplankton Database (MDB): Diversity of photo‐phago‐trophic plankton in form, function, and distribution across the global ocean. <em>Journal of Eukaryotic Microbiology.</em> 70(4)., available online at https://doi.org/10.1111/jeu.12972 [details]
ecology source Maki, T.; Imai, I. (2001). Relationships between intracellular bacteria and the bivalve killer dinoflagellate Heterocapsa circularisquama (Dinophyceae). <em>Fisheries Science.</em> 67: 794–803. [details] Available for editors
[request] 
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From editor or global species database
LSID urn:lsid:algaebase.org:taxname:57460 [details]From regional or thematic species database
Description The cells of Heterocapsa circularisquama consist of epitheca and hypotheca which are almost equal in length. Cell size: 20.0-28.8 μm (X = 23.9 μm) in length, 13.8-20.0 μm = 17.3 μm) in width. The epitheca is conical, while the hypotheca is hemispheroidal in shape. The apex of the cell is often covered with a hyaline cap which is probably composed of polysaccharide. The cingulum is relatively wide and displaced by almost 1/2 of its own width. The sulcus is narrow and almost reaches the antapex of the cell. The chloroplast is single and several lobes radiate from the central pyrenoid which is lo¬cated in the hypotheca near the cingulum. The pyrenoid is spherical and is surrounded by starch sheaths. The nucleus is large and elongated and is located in the left side of the cell, occupying substantial part of both epi- and hypotheca. The red pigmented body has often been observed somewhere in the cytoplasm (not shown). No eyespot is present. The cells of H. circularisquama are covered with thin thecal plates. Due to their very thin nature, several attempts to obtain good SEM photographs to reveal plate pattern have failed. Alternatively, however, epifluorescent microscopy coupled with fluorescent brightener staining was successfully applied to analyze thecal plate arrangement. The thecal plate arrangement has been determined as: Po, cp (or x), 5', 3a, 7", 6c, 5s, 2"". Apical pore plate (Po) is circular and there is a narrow gap at the ventral side where the canal plate (cp or x) lies. The canal plate is located between the 1' and 5' plates. The apical plate series consists of 5 plates. The first apical plate is five-sided, narrow and asymmetrical. The 3' and 4' plates are almost equal in shape and in size and occupy the upper ventral part of the cell. The 2' plate is almost pentagonal, while 5' plate is six-sided and the largest in the apical plate series. The first (1a) and third (3a) apical intercalary plates are pentagonal in shape. while variations can be seen in the shape and position of the second apical intercalary plate (2a) depending on the number of precingular plates. The most common case, though not statistically confirmed, is that the 2a plate is seven-sided and in this case, the precingular series is composed of 7 plates. The other case which was sometimes observed was the 2a plate as hexagonal and this resulted when the precingular plate series consisted of only 6 plates. The cingulum consists of 6 plates, almost all equal in length. No transitional plate has been observed. The sulcus consists of 5 plates. The anterior sulcal plate (as) invades into the epitheca and its height is as high as that of plates 1" and 7". The right sulcal plate (rs) occupies a somewhat transitional position between the cingulurn and the sulcus. The left sulcal plate is divided into two pieces, the left anterior sulcal (las) and the left posterior sulcal (Ips) plates. The posterior sulcal plate (ps) is the largest of all and is narrow and scoop-shaped. In almost all of the cells, the triangular hole can be observed just below the anterior sulcal plate and is thought to be the flagellar pore. The postcingular plate series consists of 5 plates (1"' to 5" '). The antapical plate series is composed of two plates with larger 2"" and smaller 1"" plates. [details]Harmful effect Causes mass mortality of shellfish.
Mass mortality of fish has been observed during a H.circularisquama bloom [details]
Identification This species differs from Heterocapsa illdefina (Herdman et Sweeney) Morrill et Loeblich both by the circular scales with six radiating ridges at each base plate and by the pyrenoid without invasions of the cytoplasm. [details]
Introduced species impact Chinese part of the Eastern Chinese Sea(Marine Region) Other impact - undefined or uncertain (Bloom forming) [details]
Introduced species vector dispersal Chinese part of the Eastern Chinese Sea(Marine Region) Ships: General [details]
