Ailadinium reticulatumgen. et sp. nov. (Dinophyceae), a New Thecate, Marine, Sand‐Dwelling Dinoflagellate from the NorthernRedSea

Abstract

A new photosynthetic, sand-dwelling marine dinoflagellate, Ailadinium reticulatum gen. et sp. nov., is described from the Jordanian coast in the Gulf of Aqaba, northern Red Sea, based on detailed morphological and molecular data. A. reticulatum is a large (53-61 μm long and 38-48 μm wide), dorsoventrally compressed species, with the epitheca smaller than the hypotheca. The theca of this new species is thick and peculiarly ornamented with round to polygonal depressions forming a foveate-reticulate thecal surface structure. The Kofoidian thecal tabulation is APC (Po, cp), 4', 2a, 6'', 6c, 4s, 6''', 1p, 1'''' or alternatively it can be interpreted as APC, 4', 2a, 6'', 6c, 4s, 6''', 2''''. The plate pattern of A. reticulatum is noticeably different from described dinoflagellate genera. Phylogenetic analyses based on the SSU and LSU rDNA genes did not show any supported affinities with currently known thecate dinoflagellates.

A taxonomical study of benthic Prorocentrum species (Prorocentrales, Dinophyceae) from Anse Dufour (Martinique Island, eastern Caribbean Sea)

“…Such groups of small pores might be related to production of mucous threads for the fxation of cells, as observed in other dinofagellates (e.g. Hoppenrath et al 2004;Saburova and Chomérat 2014). The possible synonymy with P. mexicanum has been discussed several times (see Hoppenrath et al 2013) and is out of focus of the present paper.…”

Oxytoxaceae are prorocentralean rather than peridinialean dinophytes and taxonomic clarification of heterotrophic Oxytoxum lohmannii (≡ “Amphidinium” crassum) by epitypification

“…Nevertheless, the topology of the phylogenetic tree allows new insights into the relationships of dinophytes not shown so far. For example, the recently studied Podolampaceae 36 appear to be an integral part of the Peridiniales, and Ailadinium Saburova & Chomérat is probably more closely related to the Gonyaulacales, as already supposed on the basis of morphological data 37 . Such examples underline the superiority of data matrices from concatenated rRNA sequences compared to single segment analyses.…”

Laciniporus arabicusgen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand‐dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)1

“…, Chomérat and Nézan , Chomérat et al. , Nézan and Chomérat , Chomérat and Bilien , Saburova and Chomérat ). The current systematic hierarchy of benthic armored dinoflagellates encompasses a wide range of monotypic genera with unique morphological characters and uncertain or unknown affiliations to higher taxa, which are morphologically and genetically distinct from any dinoflagellate genus hitherto described (e.g., Ailadinium , Amphidiniella , Herdmania , Madanidinium , Pileidinium , Plagiodinium , Planodinium , Pseudothecadinium , Rhinodinium , and Sabulodinium ; Saunders and Dodge , Faust and Balech , Horiguchi , Hoppenrath et al.…”