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Authority

N/A

Class

Diatomophyceae

Order

Pennales

Family

Catenulaceae

Synonyms

N/A

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Basionym

N/A

Additional References

N/A

Description

Cells solitary, elliptical, with truncate ends in girdle view; apical axis 25 µm; cell width (not transapex) 9.2 µm. Valves asymmetrical about the apical plane; dorsal side arcuate. Striae uniseriate; dorsal striae 26 in 10 µm. Areolae rounded. Girdle bands numerous, perforated; areolae 26 in 10 µm.

Distribution

Coastal waters off Davis Station, East Antarctica.

Comments

The single cell examined by us is similar to an illustration in Round et al. (1990: 602, fig. m).

Most species of Amphora described from Antarctic waters have been based on early collections. Examination of material (especially by electron microscopy) is required in order to clarify many taxa, while Round et al. (1990) pointed out that the genus itself requires revision. In the present study, only A. racovitzae was identified with certainty. Three other species were also found (types A, B, C), but they remain unidentified.

Van Heurck (1909) listed the following species collected on the “Belgica ” Expedition: A. racovitzae van Heurck, A. angusta var. angustissima van Heurck, A. arcta A.W.F.Schmidt, A. cymbelloides Grunow, A. mexicana var. schmidtiana van Heurck, A. peragallorum van Heurck, A. peragallorum var. robusta van Heurck and A. proteus var. oculata Perag. Hustedt (1958) described A. antarctica (similar to A. cymbelloides) from 69°43’S 06°30’E, off Dronning Maud Land.

Peragallo (1921) listed the following species collected during Charcot’s “Porquoi Pas?” Expedition of 1908–10: A. bongrainii Perag., A. gourdonii Perag., A. charcotii Perag., A. petermannii Perag., A. proteus W.Greg., A. racovitzae van Heurck, A. racovitzae var. minor van Heurck, A. senonquei Perag., A. virgata Østrup, A. virgata var. crassa Perag., A. peragallorum van Heurck, A. turgida W.Greg., A. lanceolata Cleve, A. lanceolata var. aperta Perag., A. lanceolata var. robusta Perag. and A. liouvellei Perag.

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