''Fallax'' is a genus of
brachiopods belonging to the family
Aulacothyropsidae
Aulacothyropsidae is a family of brachiopods belonging to the order Terebratulida
Terebratulids are one of only three living orders of articulate brachiopods, the others being the Rhynchonellida and the Thecideida. Craniida and Lingulida inclu ...
.
The first species of this genus described (''F. dalliniformis'') occurs in the north-eastern Atlantic. Other members of the genus are recorded from Antarctica (''F. antarcticus'') and
New Caledonia
)
, anthem = ""
, image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg
, map_alt = Location of New Caledonia
, map_caption = Location of New Caledonia
, mapsize = 290px
, subdivision_type = Sovereign st ...
(''F. neocaledonensis'').
''Fallax'' is diagnosed by having shells that are oval to subpentagonal in shape, with the anterior commissure (line where the valves meet anteriorly) straight or folded (parasulcate). The shell has an erect beak, and conjunct deltidial plates, the foramen being of a 'permesothyrid' type. The hinge teeth are supported by dental plates, and the
lophophore support (branchidium) is of a 'dipoloform' type.
''Fallax'' species have superficial similarity to some members of
Dallinidae
Dallinidae is a family of brachiopods belonging to the order Terebratulida.
Genera
Genera:
* †'' Antigoniarcula'' Elliott, 1959
* ''Campages'' Hedley, 1905
* ''Dallina'' Beecher, 1893
* ''Jaffaia'' Thomson, 1927
* ''Nipponithyris
''Nippo ...
, but can be distinguished by the persistence of dental plates.
Species:
*''
Fallax antarcticus
''Fallax'' is a genus of brachiopods belonging to the family Aulacothyropsidae.
The first species of this genus described (''F. dalliniformis'') occurs in the north-eastern Atlantic. Other members of the genus are recorded from Antarctica (''F. ...
''
*''
Fallax dalliniformis''
*''
Fallax neocaledonensis''
References
{{Taxonbar, from=Q3542856
Brachiopod genera