Enaliosuchus, KOKEN (1883)

Young, Mark Thomas & Andrade, Marco Brandalise De, 2009, What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany, Zoological Journal of the Linnean Society 157 (3), pp. 551-585 : 579-580

ENALIOSUCHUS KOKEN (1883)

Type species: Cricosaurus elegans (Wagner, 1852) (Wagner, 1858) .

Valid species: Cricosaurus elegans (Wagner, 1852) Wagner, 1858 .

Holotype: BSPG AS I 504, a complete cranium in limestone.

Cricosaurus suevicus (Fraas, 1901) comb. nov.

Holotype: none designated, we therefore designate SMNS 9808 (complete skeleton) as a lectotype, as it was one of the two skeletons upon which this species was described.

Cricosaurus araucanensis (Gasparini & Dellapé, 1976) comb. nov.

Holotype: MLP 72 -IV-7-1, complete skull with mandible.

Cricosaurus vignaudi (Frey et al., 2002) comb. nov.

Holotype: UANL FCT-R1 , incomplete skull, mandible, atlas-axis, and two cervicals.

Cricosaurus saltillense ( Buchy et al., 2006) comb. nov. Holotype: MUDE CEP1823 , poorly preserved skull lacking snout, and postcranium.

Cricosaurus gracilis (Philips, 1871) comb. nov.

Holotype: OXFUM J.1431, skull lacking snout.

Cricosaurus macrospondylus (Koken, 1883) comb. nov.

Holotype: HMN R3636.1 - 6 , atlas-axis, and numerous cervical and dorsal vertebrae.

Cricosaurus schroederi (Kuhn, 1936) comb. nov.

Holotype: MMGLV unnumbered, skull with mandible lacking complete snout, and atlas-axis and third cervical.

Etymology: ‘Ring lizard’. Cricos- is the Ancient Greek for ring, referring to the large sclerotic rings preserved in the orbits of the holotype.

Geological range: From the middle Oxfordian ( Cricosaurus sp. ; Gasparini & Iturralde-Vinent, 2001) to the upper Valanginian ( Enaliosuchus holotype; Karl et al., 2006; Koken, 1883).

Geographical range: Cosmopolitan ( Argentina, Chile, Cuba, UK, France, Germany, Mexico, Russia, and Switzerland).

Emended diagnosis: Metriorhynchid thalattosuchian with procumbent teeth, with little to no lateromedially compression; cranial bones smooth, lacking conspicuous ornamentation; acute angle formed by the lateral and medial processes of the frontal; dorsal margin of the supratemporal arcade is lower than the medial process of the frontal; eyes as large as the supratemporal fenestra; surangular and angular welldeveloped, extending rostrally beyond the orbits; symphysial part of the mandible is low, only about 15-mm high; lateral margin of the prefrontals is rounded; external nares bifurcated by premaxillary septum, and terminating at the end of the second maxillary alveoli; humerus deltopectoral crest absent; calcaneum tuber absent or vestigial; proximal end of metatarsal I greatly enlarged.