The Echinoid Directory

Contributed by Louis Zachos, May 2013

Tripatagus Zachos, 2012, p. 45

Diagnostic Features
  • Apical system ethmolytic with 3 gonopores; no gonopore in genital plate 2.
  • Anterior ambulacrum non-petaloid, sunken, pores uniserial.
  • Petaloid ambulacra sunken, pores not conjugate.
  • Amphisternous plastron; elongate labrum. Adoral interambulacra amphiplacous.
  • Peripetalous fasciole and bilobed subanal fasciole present
Distribution Lower Oligocene (Rupelian), Marianna Limestone and Glendon Limestone (Vicksburg Group), Rankin, Smith, and Warren Counties, Mississippi, USA
Name gender masculine
Type Tripatagus pittsi Zachos, 2012, p. 45, by original designation. Holotype: Mississippi Museum of Natural Science (MMNS) IP-4006, paratypes MMNS IP-3929, IP-103.1, IP-103.2, IP-103.3
Species Included Only the type species.
Classification and/or Status Spatangoida, Micrasterina, Maretiidae?

Remarks Zachos, L.G. 2012. A new genus and species of echinoid (Echinoidea, Spatangoida) from the Oligocene (Rupelian) of Mississippi. Southeastern Geology 49(1): 43-48.