Laosuchus naga was named by Arbez et al. (2019) [Laosuchus naga has the following autapomorphies: (1) pineal foramen extremely reduced (1 mm in diameter); (2) absence of palatal dentition (no tusks, dental rows or dental alveoli); (3) well-developed transverse flange of the pterygoid that contacts the maxilla; (4) internal crest on and above the dorsal side the palate (vomer, ectopterygoid and pterygoid); (5) otic notch closed by the tabular horn and the posterior part of the squamosal, forming a continuous wall; (6) thin and high ventro-medial ridge on parasphenoid. Diagnostic characters, but not exclusive to Laosuchus naga are: (1) absence of paired preorbital fenestrae; (2) presence of a premaxillary fontanelle; (3) maxilla and quadratojugal separated by jugal; (4) absence of anterior palatal vacuity; (5) pterygoid with transverse process and descending flange; (6) jaw with parasymphyseal dental plate. Characters supporting an assignment to Reptiliomorpha (according to Benton 2004 and character states in our phylogenetic analysis, see below) are: (1) parietal and tabular sharing a narrow suture (angustitabular condition); (2) premaxillae less than half of the skull width (Benton 2004); (3) vomers strutlike, narrow. Characters supporting an assignment to Chroniosuchia (according to the character states in our phylogenetic analysis and anatomical comparisons, see below for details and discussion) are: (1) skull roof with elaborate system of oblique transverse and sagittal ridge; (2) presence of premaxillary ontanelle; (3) prefrontal and jugal in contact anterior to orbit; (4) pterygoid flange well developed; (5) very narrow parasphenoid with a crest between the basicranial joint; (6) braincase poorly ossified.]. It is not extant. Its type specimen is MDS-LPQ 2005-09, a skull (Nearly complete skull with its left hemi-mandible partly articulated). Its type locality is Laosuchus-type locality, which is in an Induan terrestrial siltstone in the Purple Claystones Formation of Laos.