Genus: Ctenosaurus HUENE, 1902 non FITSINBER, 1843
Etymology: Greek, ktenos (kteis), "comb", Greek, sauros, "lizard" .
= Ctenosauriscus KUHN, 1964
Etymology: Greek, ktenos (kteis), "comb", Greek, sauros, "lizard" and Greek, iscus, "little."
Note: Maisch (2025) determined Kuhn renaming was invalid.

Species: koeneni HUENE, 1902
Etymology:
= Ctenosauriscus koeneni (HUENE, 1902) KUHN, 1964

Holotype: TZG. (Geol.-Palaontol. Inst. Univ. Gottingen) V. 419-1.

Locality: Bremke Dell, Bremke valley, Quarry east of the village of Reinhusen, about 10 km SE of Göttingen, Göttengen District, Niedersachen, Lower Saschen (Saxony) State, Germany.

Horizon: "Solling-Bausandstein" ("Solling Building Sandstone"), Upper Middle Buntsandstein ("Bunter"), Lower part of Solling Formation (equivalent to the Trendelburg/Karlshafen Beds), Middle Buntsandstein Subgroup, Keuper Group.

Biostratigraphy:

Age: Late Olenekian, Upper Spathian Stage, Upper Scythian Epoch, Early Triassic.

Material: Cervical, dorsal and sacral? vertebrae, ribs.

Referred material:

EBEL, FALKENSTEIN, HADERER & WILD, 1998, BUTLER, BRUSATTE, REICH, NESBITT, SCHOCH & HORNUNG, 2011

Locality: Waldhaus Brewery, Waldhaus near Waldshut, Waldhurst District, 47°40'58"N, 08°09'26"E, Baden-Wurttemberg State, Germany.

Horizon: Röt Formation, Upper Buntsandstein.

Biostratigraphy:

Age: Early Anisian Stage, Aegean-Bithynian, Lower Mid Triassic Epoch, Earliest Middle Triassic.

Material:

SMNS 91402: Partially preserved anterior dorsal vertebra.

SMNS 91405: 2 elongate neural spines.

SMNS 91403, 91404: Partially preserved elongate neural spines.

SMNS 91041: Left ilium.