Heterocapsa lanceolata sp. nov. and Heterocapsa horiguchii sp. nov. (Peridiniales, Dinophyceae), two new marine dinoflagellates from coastal Japan

Iwataki, Mitsunori; Takayama, Haruyoshi; Matsuoka, Kazumi; Fukuyo, Yasuwo

doi:10.2216/i0031-8884-41-5-470.1

Cited by 22 publications

(40 citation statements)

References 9 publications

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“…Scale barsϭ10 mm. Pomroy (1989) and Kofoid (1907), respectively; others are from Iwataki (2002) and Iwataki et al (2002aIwataki et al ( , 2003Iwataki et al ( , 2004 other hand, cell shape seems to be stable in each species. Many Heterocapsa species exhibit an ellipsoidal or spherical outline in the dorsal view and it is difficult to discern.…”

Section: Identification Of Heterocapsa Based On Cellular Morphologymentioning

confidence: 99%

“…In the last decade, following the description of the harmful species H. circularisquama (Horiguchi 1995 (Horiguchi 1997, Iwataki et al 2002a, 2003, 2004, Tamura et al 2005. Based on a comparison of morphological characteristics, common characters of the genus Heterocapsa were reexamined and the generic diagnosis was emended by Iwataki & Fukuyo as: unicellular photosynthetic dinoflagellate with thecal plates arranged as Po, cp, 5Ј, 3a, 7Љ, 6c, 5s, 5ٞ, 2ЉЉ and three-dimensional triradiate body scales (Iwataki et al 2003).…”

Section: Taxonomic History Of Heterocapsamentioning

confidence: 99%

“…However, several species possess specific features such as an apparently large epitheca compared to the hypotheca and an antapical horn. For example, the cell shape of H. triquetra is rhomboid with an antapical horn, H. arctica is elongated with a large epitheca, H. lanceolata is lanceolate with a large epitheca and an antapical horn, and H. rotundata is rather small with a large epitheca (Hansen 1995, Horiguchi 1997, Iwataki et al 2002a). Based on these specific characters, these four species can be identified under a light microscope (Figs.…”

Section: Identification Of Heterocapsa Based On Cellular Morphologymentioning

confidence: 99%

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Taxonomy and identification of the armored dinoflagellate genus Heterocapsa (Peridiniales, Dinophyceae)

Iwataki¹

2008

Plankton Benthos Res

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Abstract:The armored dinoflagellate genus Heterocapsa is composed of relatively small species, including a species responsible for harmful red tides, H. circularisquama. Some Heterocapsa species such as H. rotundata and H. triquetra have been well documented as red tide-forming species, but are not recognized as causing harmful effects. Following sequential shellfish mass mortalities in the coastal waters of western Japan due to H. circularisquama red tides, this species has attracted considerable interest. Many properties of this species, such as its distribution and growth characteristics, have been investigated to better understand the mechanisms involved in harmful red tide formation. Related to the need for unambiguous identification of H. circularisquama, several unidentified (or undescribed) Heterocapsa species, which must be distinguished from the harmful taxon, have been detected sympatrically in regions where H. circularisquama blooms occur. However, the taxonomic affiliation of these Heterocapsa species have not yet been determined because several characteristics of Heterocapsa (e.g. body scale ultrastructure) have not yet been reported from all described species due to the changing taxonomic criteria. After the taxonomic ambiguities in this genus were resolved, cellular and body scale morphology of Heterocapsa were reinvestigated and several new species were described. In the present paper, the taxonomic history and morphological characters of the genus Heterocapsa are summarized.

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Section: Identification Of Heterocapsa Based On Cellular Morphologymentioning

confidence: 99%

Section: Taxonomic History Of Heterocapsamentioning

confidence: 99%

Section: Identification Of Heterocapsa Based On Cellular Morphologymentioning

confidence: 99%

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Taxonomy and identification of the armored dinoflagellate genus Heterocapsa (Peridiniales, Dinophyceae)

Iwataki¹

2008

Plankton Benthos Res

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“…(Iranian strain) ranged from 11 to 16 µm. H. niei, H. pygmaea, and the Iranian strain are all ellipsoidal with equally sized epitheca and hypotheca, whereas in H. rotundata, H. niei, and H. circularisquama the epitheca is larger than the hypotheca (Iwataki et al, 2002;Tamura et al, 2005). The pyrenoid in H. triquetra is in the hypotheca, while the nucleus is in the epitheca.…”

Section: Discussionmentioning

confidence: 93%

“…(Figure 2). H. triquetra has a typical horn, its size is larger than H. rotundata, and its epi-hypotheca sizes are equal; however, H. rotundata has a large epitheca and small rounded hypotheca (Iwataki et al, 2002). The second clade (HC2) comprised Heterocapsa sp.…”

Section: Discussionmentioning

confidence: 99%

The phylogeny of Heterocapsa sp. (Dinophyceae) isolated from the south coast of Iran during a Cochlodinium polykrikoides bloom

Fariman¹

2013

Turk J Bot

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The genus Heterocapsa Stein is a relatively small armoured dinoflagellate. Because it has few differences in morphological characteristics among its species, species identification is difficult. In this study, small Heterocapsa sp. cells associated with a dense bloom of Cochlodinium polykrikoides Margalef were collected from the south-east coast of Iran. While Heterocapsa sp. was isolated, C. polykrikoides could not be isolated by single cell or serial dilution methods. Thus, a unialgal strain of Heterocapsa sp. was used for molecular analysis and species identification. In order to carry out phylogenetic analysis, rDNA was extracted and large subunit domains of D1-D3 were sequenced. Similar sequences of other geographical strains were selected from GenBank and compared with the Iranian species. The Iranian strain was aligned with Heterocapsa spp. Phylogenetic analysis of maximum likelihood and neighborjoining demonstrated that Heterocapsa sp. does not form a monophyletic group. Morphological characteristics confirmed molecular results. This is the first record of Heterocapsa isolation from Iranian coastal waters.

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Heterocapsa bohaiensis sp. nov. (Peridiniales: Dinophyceae): a novel marine dinoflagellate from the Liaodong Bay of Bohai Sea, China

Xiao

Sun²,

Zhang

et al. 2018

Acta Oceanol. Sin.

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Heterocapsa lanceolata sp. nov. and Heterocapsa horiguchii sp. nov. (Peridiniales, Dinophyceae), two new marine dinoflagellates from coastal Japan

Cited by 22 publications

References 9 publications

Taxonomy and identification of the armored dinoflagellate genus Heterocapsa (Peridiniales, Dinophyceae)

Taxonomy and identification of the armored dinoflagellate genus Heterocapsa (Peridiniales, Dinophyceae)

The phylogeny of Heterocapsa sp. (Dinophyceae) isolated from the south coast of Iran during a Cochlodinium polykrikoides bloom

Heterocapsa bohaiensis sp. nov. (Peridiniales: Dinophyceae): a novel marine dinoflagellate from the Liaodong Bay of Bohai Sea, China

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