''Haasiasaurus'' is an extinct genus of early

mosasaur Mosasaurs (from Latin ''Mosa'' meaning the 'Meuse', and Ancient Greek, Greek ' meaning 'lizard') are an extinct group of large aquatic reptiles within the family Mosasauridae that lived during the Late Cretaceous. Their first fossil remains wer ...

, originally named "''Haasia''" by M. J. Polcyn ''et al.'', in honour of the palaeontologist Georg Haas. The original name was a

junior homonym In biology, a homonym is a name for a taxon that is identical in spelling to another such name, that belongs to a different taxon. The rule in the International Code of Zoological Nomenclature is that the first such name to be published is the s ...

of '' Haasia'' Bollman, 1893, a genus of

millipede Millipedes (originating from the Latin , "thousand", and , "foot") are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derive ...

s. ''Haasiasaurus'' was one of the oldest mosasaurs, measuring long. The genus contains the species ''Haasiasaurus gittelmani'', which was found in

Cenomanian The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretace ...

Turonian The Turonian is, in the International Commission on Stratigraphy, ICS' geologic timescale, the second age (geology), age in the Late Cretaceous epoch (geology), Epoch, or a stage (stratigraphy), stage in the Upper Cretaceous series (stratigraphy), ...

(

Upper Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cret ...

, about 100 to 93 million years ago) rocks near Ein Yabrud, in the

Palestinian Palestinians () are an Arab ethnonational group native to the Levantine region of Palestine. *: "Palestine was part of the first wave of conquest following Muhammad's death in 632 CE; Jerusalem fell to the Caliph Umar in 638. The indigenous p ...

West Bank The West Bank is located on the western bank of the Jordan River and is the larger of the two Palestinian territories (the other being the Gaza Strip) that make up the State of Palestine. A landlocked territory near the coast of the Mediter ...

, approximately north of

Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...

References

Mosasaurids Fossils of Palestine Mosasaurs of Asia Fossil taxa described in 2003 {{paleo-lizard-stub