Sous-embranchement (subphylum) des Rhynchonelliformea
Classe des Rhynchonellata
Ordre des Terebratulida
Sous-Ordre des Terebratellidina
Super-famille des Platidoidea


Genus Annuloplatidia Zezina, 1981
[Type species= Annuloplatidia indopacifica Zezina, 1981, p. 144]

Small (up to 4.7 mm wide), smooth, planoconvex to concavoconvex; foramen amphithyrid; pedicle collar sessile; deltidial plates rudi- mentary. Crura projecting anteriorly from inner socket ridges; transverse band connecting distal extremities of divergent septal flanges on apex of septal pillar to form a triangular ring; descending branches as in Platidia. Differs from Platidia in presence of transverse band in brachidium.
Lophophore zygolophous.

Pliocene - Present

Diagnosis from volume 5 of the
Treatise on Invertebrate Paleontology (2006)

Extant Species of Annuloplatidia
  • A. indopacifica Zezina 1981
  • A. horni (Gabb, , 1861)
  • A. annulata (Atkins, 1959)
  • A. richeri Bitner, 2009
  • A. curiosa Bitner, 2014

  • Diagnosis

      FIGURES : Annuloplatidia

    Annuloplatidia curiosa   Bitner, 2014

    Type locality: Seamount SE of Tahiti, station DW 3298, 340 m [18°20'S, 148°33'W]
    Depth range: 225 - 781 m

    Platidiidae gen. & sp. indet.: Campbell and Fleming, 1981, p. 151–153, fig. 24–36.
    Megerlia echinata: Laurin (1997), p. 452-453, fig. 38-39.
    Megerlia truncata: Bitner (2007), p. 496-498, fig. 3I, J; Bitner (2008), p. 451, fig. 19D, E.

    Diagnose - Bitner (2014)

    Large Annuloplatidia with irregular outline and ventral valve covered with 15-20 beaded ribs. Foramen large, transversely oval, amphithyrid. Teeth hooked with dental plates. Short ventral median ridge present. Inner socket ridges short but high. Crura short, descending branches wide, attached to ascending branches that are connected by a transverse band.

    from Bitner (2019)