Morohasaurus information

Morohasaurus; Temporal range: Albian? 100 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
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."^[1] If its presumed affinities are correct, Morohasaurus represents the oldest known monstersaurian to date.

^ ^a ^b Ikeda, T.; Ota, H.; Tanaka, T.; Ikuno, K.; Kubota, K.; Tanaka, K.; Saegusa, H. (2021). "A fossil Monstersauria (Squamata: Anguimorpha) from the Lower Cretaceous Ohyamashimo Formation of the Sasayama Group in Tamba City, Hyogo Prefecture, Japan". Cretaceous Research. 130: Article 105063. doi:10.1016/j.cretres.2021.105063. S2CID 239230916.

[Ikeda-1] Ikeda, T.; Ota, H.; Tanaka, T.; Ikuno, K.; Kubota, K.; Tanaka, K.; Saegusa, H. (2021). "A fossil Monstersauria (Squamata: Anguimorpha) from the Lower Cretaceous Ohyamashimo Formation of the Sasayama Group in Tamba City, Hyogo Prefecture, Japan". Cretaceous Research. 130: Article 105063. doi:10.1016/j.cretres.2021.105063. S2CID 239230916.

Morohasaurus information

and 27 Related for: Morohasaurus information

Morohasaurus

Komodo dragon

Monitor lizard

Varanus salvadorii

Perentie

Gila monster

Megalania

Asian water monitor

Goanna

Mosasauria

Bengal monitor

Nile monitor

Sand goanna

Varanidae

Squamata

Savannah monitor

Heloderma

Clouded monitor

Mexican beaded lizard

Heloderma charlesbogerti

Desert monitor

Lace monitor

Earless monitor lizard

Northern Sierra Madre forest monitor

Emerald tree monitor

Dampier Peninsula monitor

Tetrapodophis