Cochliopodium
Cochliopodium Hetwig & Lesser, 1874 (ref. ID; 7052)
Order Himatismenida (ref. ID; 7052)
[ref. ID; 7052]
The genus Cochliopodium comprises lens-shaped amoebae covered by the tectum, a flexible layer of carbohydrate scales, which covers the dorsal surface only of the adhering cell. In locomotion these amoebae form a broad peripheral sheet of hyaloplasm surrounding the central granuloplasm. Their mitochondria have branching tubular cristae, and Golgi dictyosomes are well developed. Traditional morphology-based cassification schemes generally placed this genus among the arcellinid testate lobose amoebae (Testacealobosia). However, Bovee (1979) recognized the similarity of their flat pseudopodia with those of Vannellidae, Hyalodiscidae and Flabellulidae and accordingly grouped the family Cochliopodiidae De Saedeleer, 1934 with these families as the order Pharopodida. Page (1987) more conservatively left them in Testacealobosia, but because of new insights into the nature of the tectum (Bark 1973; Nagatani et al. 1981; Yamaoka et al. 1984) created a separate order Himatismenida for Cochliopodiidae (i.e. Cochliopodium, Gocevia and Paragocevia). Bark (1973) made the radical suggestion that Cochliopodium may be more closely related to chrysomonads than to amoebae due to the presence of surface scales in both taxa. However, these amoebae have most morphological features of Gymnamoebia sensu Page, 1987, even though the presence of the tectum sets then apart from other "gymnamoebian" taxa. Rogerson and Patterson (2002) treated Cochliopodiidae as "gymnamoebae of uncertain affinities", unassigned to an order. The recent classification of Amoebozoa proposed by Cavalier-Smith et al. (2004) abandoned both Gymnamoebia and Testacealobosia as formal taxa and placed the order Himatismenida in the new class Discosea, together with the orders Glycostylida (mainly comprising Vannellidae, Vexilliferidae and Paramoebidae) and Dermamoebida (Thecamoebidae, i.e. Dermamoeba and Thecamoeba). (ref. ID; 7052)
- Cochliopodium bilimbosum (ref. ID; 4118)
- Cochliopodium minus Page, 1976 (ref. ID; 7052)
- Cochliopodium minutum West, 1901 (ref. ID; 7052)
- Cochliopodium spiniferum Kudryavtsev, 2004 (ref. ID; 7052)
Descriptions
18S ribosomal RNA gene sequence. (ref. ID; 7052)
Descriptions
18S ribosomal RNA gene sequence. (ref. ID; 7052)
Descriptions
18S ribosomal RNA gene sequence. (ref. ID; 7052)