Br@chNet
Septicollarina

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

 
 
 
 
 


Genus Septicollarina Zezina, 1981
[Type species= Septicollarina hemiechinata Zezina, 1981 (p. 16)]

Small, thin shelled, transversely oval, biconvex, anterior commissure slightly unisulcate; dorsal valve smooth; ventral valve carrying small low spines; beak straight, short, foramen permesothyrid, deltidial plates narrow, disjunct; dental plates straight, well developed; short septum in ventral valve dividing cavity beneath wide pedicle collar into two chambers; no cardinal process; inner hinge plates attached to long median septum; spicules not present; loop diploform, anteriorly spinose.

Present

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

Extant Species of Septicollarina
  • S. hemiechinata Zezina, 1981
  • S. oceanica Zezina, 1990
  • S. zezinae Bitner, 2009



    • Diagnosis


    Septicollarina zezinae   Bitner, 2009

    Type locality: "Jumeau East seamount, Norfolk Ridge, 23°39.23’S, 168°16.43’E, 900-950 m."
    Depth range: 229 - 950 m

    Septicollarina sp. - Bitner (2008, p. 437-439, fig. 16A).
    Septicollarina sp. - Zezina (2010, p. 1189).

    Diagnosis (Bitner, 2009)


    Medium-sized Septicollarina, transversely pentagonal in outline and strongly unisulcate. Shell surface smooth with faint radial lines and rare, randomly distributed, small pustules. Beak short, erect to incurved. Foramen permesothyrid, circular, deltidial plates minute. Wide pedicle collar supported by dental plates and short ventral septum. No cardinal process. Loop diploform, anteriorly weakly spinose.