Morohasaurus Temporal range: Albian? | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Clade: | Monstersauria |
Genus: | † Morohasaurus Ikeda et al., 2021 |
Type species | |
†Morohasaurus kamitakiensis Ikeda et al., 2021 |
Morohasaurus is an extinct genus of cf. monstersaurian squamates know from a single left dentary from the Early Cretaceous (?Albian) Ohyamashimo Formation of the Sasayama Group in Tamba City, Hyogo Prefecture, Japan. [1] The type and only species is Morohasaurus kamitakiensis.
As of 2021, Ikeda et al. place this taxon a conferatur within Monstersauria based on general synapomorphies but without performing a phylogenetic analysis. The unique characters described in the paper to distinguish Morohasaurus kamitakiensis as a valid species include "the sinuous posteroventral rim of the dentary with a large U-shaped upper notch and small V-shaped lower notch, posteroventral corner of intramandibular septum with a weakly pointed eminence projecting posteriorly, and unicuspid, curved trenchant teeth with distinct blade-like carinae on their mesial and distal sides without grooves or serrations." If its presumed affinities are correct, Morohasaurus represents the oldest known monstersaurian to date. [1]
Tamba-Sasayama, formerly known as Sasayama, is a city in the central eastern part of Hyōgo Prefecture, Japan. As of 31 March 2022, the city had an estimated population of 40,050 in 17523 households and a population density of 110 persons per km2. The total area of the city is 493.21 square kilometres (190.43 sq mi)
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