The
tectofilosids are a group of filose
amoebae with shells. These are composed of organic materials and sometimes collected debris, in contrast to the
euglyphids, which produce shells from siliceous scales. The shell usually has a single opening, but in
Amphitrema and a few other genera it has two on opposite ends. The cell itself occupies most of the shell. They are most often found on marsh plants such as
Sphagnum.
This group was previously classified as the Gromiida or Gromiina. However, molecular studies separate
Gromia from the others, which must therefore be renamed. They are placed among the
Cercozoa, and presumably developed from
flagellates like
Cryothecomonas, which has a similar test. However, only a few have been studied in detail, so their relationships and
monophyly are not yet certain.
In a recent classification, the group Tectofilosida was not used:
Chlamydophryidae,
Psammonobiotidae,
Pseudodifflugiidae and
Volutellidae were dispersally placed in
Thecofilosea, while
Amphitremidae was included in
Labyrinthulomycetes.
[2]
References;
1
- Cavalier-Smith T, Chao EE (October 2003). "Phylogeny and classification of phylum Cercozoa (Protozoa)". Protist. 154 (3-4): 341–58. doi:10.1078/143446103322454112. PMID 14658494.
- ^ Adl SM, Simpson AG, Lane CE, Lukeš J, Bass D, Bowser SS, Brown MW, Burki F, Dunthorn M, Hampl V, Heiss A, Hoppenrath M, Lara E, Le Gall L, Lynn DH, McManus H, Mitchell EA, Mozley-Stanridge SE, Parfrey LW, Pawlowski J, Rueckert S, Shadwick L, Shadwick L, Schoch CL, Smirnov A, Spiegel FW (2012). "The revised classification of eukaryotes". J. Eukaryot. Microbiol. 59 (5): 429–93. doi:10.1111/j.1550-7408.2012.00644.x. PMC 3483872
. PMID 23020233.