''Rugocaudia'' is a potentially dubious genus of

basal Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''. Science * Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure * Basal (medicine), a minimal level that is nec ...

sauropod Sauropoda (), whose members are known as sauropods (; from '' sauro-'' + '' -pod'', 'lizard-footed'), is a clade of saurischian ('lizard-hipped') dinosaurs. Sauropods had very long necks, long tails, small heads (relative to the rest of their bo ...

dinosaur known from the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

of Montana, United States.

Discovery

''Rugocaudia'' is known only from the holotype

MOR Mor or MOR may refer to: Names and titles * Mór (given name), a list of people named Mór or Mor * Mor (surname), a list of people named Mor or Mór * Mor (honorific), or Mar, in Syriac Radio and television * Middle of the road (music) genre * ...

334, a partial

postcrania Postcrania (postcranium, adjective: postcranial) in zoology and vertebrate paleontology is all or part of the skeleton apart from the skull. Frequently, fossil remains, e.g. of dinosaurs or other extinct tetrapods, consist of partial or isolated sk ...

skeleton A skeleton is the structural frame that supports the body of an animal. There are several types of skeletons, including the exoskeleton, which is the stable outer shell of an organism, the endoskeleton, which forms the support structure inside ...

which consist of 18

caudal vertebrae The spinal column, a defining synapomorphy shared by nearly all vertebrates,Hagfish are believed to have secondarily lost their spinal column is a moderately flexible series of vertebrae (singular vertebra), each constituting a characteristic ...

and associated material including isolated neural arch, tooth, chevron, and distal section of a metacarpal. It was collected from the Cloverly Formation, dating to the

Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), a ...

or the Albian stage of the

Validity

''Rugocaudia'' is considered to be a

nomen dubium In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a s ...

by D'Emic and Foreman.

Etymology

''Rugocaudia'' was first described and named by D. Cary Woodruff in

2012 File:2012 Events Collage V3.png, From left, clockwise: The passenger cruise ship Costa Concordia lies capsized after the Costa Concordia disaster; Damage to Casino Pier in Seaside Heights, New Jersey as a result of Hurricane Sandy; People gather ...

and the type species is ''Rugocaudia cooneyi''. The generic name is deriverd from Latin ''ruga'', "wrinkle" and ''cauda'', "tail" in regards to the highly rugose posterior margins of the caudal vertebrae. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

honors the land owner J.P. Cooney.

References

Early Cretaceous dinosaurs of North America Macronarians Fossil taxa described in 2012 Cloverly fauna Paleontology in Montana Nomina dubia {{sauropodomorph-stub