Suzuki, Suzuki & Caulet & Dumitrica, 2021

Suzuki, Noritoshi, Caulet, Jean-Pierre & Dumitrica, Paulian, 2021, A new integrated morpho- and molecular systematic classification of Cenozoic radiolarians (Class Polycystinea) - suprageneric taxonomy and logical nomenclatorial acts, Geodiversitas 43 (15), pp. 405-573 : 527-528

Family COLLOPHIDIIDAE Biard & Suzuki in Biard, Pillet, Decelle, Poirier, Suzuki & Not, 2015

Collophidiidae Biard & Suzuki in Biard, Pillet, Decelle, Poirier, Suzuki & Not, 2015: 384.

Collophidae – Ishitani et al. 2012 [no pages can be specified due to ambiguous indication, no type genus indication, and grammatic error in name formation, unavailable name].

TYPE GENUS. — Collophidium Haeckel, 1887: 26 [type species by subsequent designation ( Campbell 1954: D44): Collozoum serpentinum Haeckel, 1887: 26 ].

INCLUDED GENERA. — Collophidium Haeckel, 1887: 26 .

NOMEN DUBIUM. — Colloprunum .

DIAGNOSIS. — Collophidiidae are Colonial Collodaria with a variable elongated, cylindrical, or spherical appearance. Each colony is comprised of a delicate gelatinous material that encompasses the scattered algal symbionts and the string-like aggregations. A stringlike aggregation includes tens to a hundred collodarian cells within a firm gelatinous material. The central capsule is of an elongated cylindrical shape, with an endoplasm highly vacuolated.

STRATIGRAPHIC OCCURRENCE. — Living.

REMARKS

The taxonomic independency of Collophidium was initially recognized by the studies of Anderson et al. (1999). This was achieved by the observation of ultrafine cellular structure and the publication of “living” images.Their results were later supported by a molecular phylogenetic study by Ishitani et al. (2012).

The microbial eukaryotes (0.8-20 Μm) of the bathypelagic zone (3000-4000 m in water depth) in global oceans are dominated by Collophidium , suggesting the important role of this genus in the deep-ocean ( Pernice et al. 2016). This family can be easily distinguished from the other collodarian families by the presence of cell-embedded sacks observed within the gelatinous matter. Many undescribed genera and species are encountered in plankton samples. Four Collophidium species were drawn in figs 10-13 of Strelkov & Reshetnyak (1971) but need to be described again as new species due to their identification based on the unillustrated species of Haeckel (1887).