Species: atavus (QUENSTEDT 1851-52 emend HUENE, 1916) MAISCH & MATZKE, 1998
Etymology: Latin, atavus, "grandfather.)
= Ichthyosaurus atavus QUENSTEDT 1851-52
= Phalarodon atavus (QUENSTEDT, 1852) MERRIAM, 1910 (partim)
= Mixosaurus atavus (QUENSTEDT, 1852) HUENE, 1916

Neotype: SMNS 153787

Locality: West of the road Simmozheim-Althegstett, between the road and path leading to Neuhengstett, 34,62 km from Weil der Stadt, 507,6 m above sea-level, Germany.

Horizon: “Homonyen-Mergel of the Wellendolomit” = Wurstelbanke Member of the Freudenstadt Formation (muFW) (Hagdorn et al. 1993), Lower Muschelkalk.

Biostratigraphy:

Age: Upper Pelsonian, Middle Anisian Stage (VISSCHER et al. 1993), Mid Triassic Epoch, Middle Triassic.

Material: Incomplete three-dimensional skull lacking the mandible and snout.

Lectotype: GPIT/RE/411 (as per MAISCH & MATZKE, 2001)

Locality: Calw-Althegstett, Baden-Wurttemberg State, Germany.

Horizon: Lower Muschelkalk, horizon unspecified, probably Freudenstadt Formation.

Biostratigraphy: Beneckei buchi Assemblage zone.

Age: Pelsonian, Anisian Stage (VISSCHER et al. 1993), Mid Triassic Epoch, Middle Triassic.

Material: Almost complete left maxilla, lacrimal and part of prefrontal.

After von Huene.

Referred material:

GPIT/RE/98: Incomplete left maxilla.

GPIT/RE/408: Part of the right half of a supraorbital skull roof.

GPIT/RE/409: Incomplete lower jaw.

GPIT/RE/410: Part of the rostrum.

MAISCH & MATSKE, 2001

GPIT/RE/107 (formerly 1798): The right upper jaw and portion of the antorbital skull roof, most of the supraorbital skull roof, including much of the sagittal crest, parts fo the mandible, and some postcranial bones.

 

MAISCH & MATSKE, 1998

Locality: Rudersdorf, Brandenberg State, Germany.

Horizon: Upper Lower Muschelkalk.

Biostratigraphy:

Age: Late Lllyrian, Latest Anisian Stage, upper lower Mid Triassic Epoch, Middle Triassic.

Material:

BMPI R 2353 (formerly 5180): Fragmentary skull.

 

Locality: Althengstett, Baden-Wurttemberg State, Germany.

Horizon: Wurstelbanke Member, Freudenstadt Formation, Lower Muschelkalk.

Biostratigraphy:

Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

GPIT RE/107 (was GPIT 1798): Right upper jaw and antorbital skull roof, a partly macerated and badly damaged skull with parts of both mandibular rami and some postcranial fragments.

 

MAISCH & MATSKE, 2000, 2001

Locality: Rohrdorf, Baden-Wurttemberg State, Germany.

Horizon: Lower Muschelkalk.

Biostratigraphy:

Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

Institut und Museum fur Geologie und Palaontologie, Tubingen, GPIT RE/79 (formerly PV 17765): An almost complete right frontal, largely preserved as an impression, of a large individual.

 

Locality: Bodigheim, Baden-Wurttemberg State, Germany.

Horizon: Lower Muschelkalk.

Biostratigraphy:

Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

Muschelkalkmuseum Ingelfingen, MHI 1658: Right half of a skull roof preserving most of the maxilla, the antorbital region and the nasofrontal sagittal crest, and isolated left quadrate.

 

= Phalarodon atavus ENGELSCHIØN, ROBERTS, WITH & HAMMER, 2023

Locality: Muen Mountain, 77°49'24.2"N, 21°22'39.4"E, Edgeøya, Svalbard, Spitsbergen, Norway.

Horizon: Blanknuten Member, Botneheia Formaiton.

Biostratigraphy:

Age: Middle Ladinian Stage, Late Middle Triassic Epoch, Late Middle Triassic.

Material:

PMO 219.250: Skull and nearly complete skeleton.

 

= Phalarodon atavus? LIU, MOTANI, JIANG, HU, AITCHISON, RIEPPEL, BENTON, ZHANG, & ZHOU, 2013

Locality: Yunnan Province, China.

Horizon: Luoping Biota.

Biostratigraphy:

Age: Middle Triassic.

Material:

LPV 30872: Fragmentary skull and skeleton.

 

= ?Cymbospondylus WILD,

Locality: Former Haas Quarry at Dietersweiler, near Freudenstadt, Baden-Wurttemberg State, Germany.

Horizon: Wurstelbanke Member, Freudenstadt Formation, Lower Muschelkalk.

Biostratigraphy: Schichten mit Homomya albertii (according to the original label).

Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material:

Staaliches Museum fur Naturkunde, Stuttgart, SMNS 56315: Part of the left premaxilla and maxilla of an extraordinalry large specimen.

 

CORROY, 1928

Localities: Rehainvillers, Mont-sur-Meurthe Department, France.

Horizon: Muschelkalk.

Biostratigraphy:

Age: Mid Triassic Epoch, Middle Triassic.

Material:

Number: Not given: Fragmentary remains.

HUENE

Locality:

Horizon:

Biostratigraphy:

Age:

Material:

Private collection: Fragmentary skull missing the anterior end.