Pareisactus
From Greek pareisaktos (intruder); referring to the specimen being found as a single element among hundreds of hadrosaurid bones.
Late Cretaceous stages
Pareisactus is a genus of rhabdodontid ornithopod dinosaur from the Late Cretaceous (lower Maastrichtian) Conquès Member of the Tremp Formation in the Southern Pyrenees of Spain. The type and only species is P. evrostos, known only from a single scapula.
Diagnosis
- Scapula with dorsoventral extent of proximal constriction (scapular neck) as deep as it is thick
- Lateral surface of proximal scapula under acromion forming deep and thick roof over extremely deep deltoid fossa
- Long glenoid apex accounting for half of maximum depth of proximal region of scapula
- Well-demarcated deltoid ridge extending caudoventrally to ventral margin of scapular blade
- Acromion process craniodorsally projected, lateral profile nearly parallel to cranial margin of glenoid
Species
Pareisactus evrostos Párraga & Prieto-Márquez, 2019
Type species
From Greek 'evrostos' meaning 'robust', in reference to the great mediolateral thickness of the proximal scapula and the massive build of the deltoid ridge.
- Holotype
- MCD 5371 , Museu de la Conca Dellà
- Material
- Nearly complete left scapula with dorsoventral depth of proximal constriction as deep as it is thick; lateral surface under acromion forming deep roof over extremely deep deltoid fossa; long glenoid apex accounting for half of maximum depth of proximal region.
- Horizon
- Conques Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
- Locality
- Basturs Poble, Lleida, Spain
References
- Párraga, J.; Prieto-Márquez, A. (2019). Pareisactus evrostos, a new basal iguanodontian (Dinosauria: Ornithopoda) from the Upper Cretaceous of southwestern Europe. Zootaxa 4555(2). Magnolia Press. doi:10.11646/zootaxa.4555.2.5 párraga2019a