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Maip macrothorax

Reptilia - Megaraptoridae

Taxonomy
Maip macrothorax was named by Aranciaga Rolando et al. (2022). Its type specimen is MPM 21,545, a partial skeleton (including axis, dorsals 2, 3, 4, 5, 6, 7, 9, 10 (or 11), and 12 (or 13), two proximal caudals (caudal A, probably pertaining to caudal 3–5 and caudal B, pertain), and it is a 3D body fossil. Its type locality is La Anita (Megaraptorid site), which is in a Maastrichtian terrestrial claystone in the Chorrillo Formation of Argentina. It is the type species of Maip.

Synonymy list
YearName and author
2022Maip macrothorax Aranciaga Rolando et al. p. 2

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
RankNameAuthor
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
—Megaraptora
familyMegaraptoridae
genusMaip
speciesmacrothorax

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Maip macrothorax Aranciaga Rolando et al. 2022
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Diagnosis
ReferenceDiagnosis
A. M. Aranciaga Rolando et al. 2022Megaraptorid theropod diagnosable on the basis of the following combination of characters (autapomorphies marked by an asterisk): (1) mid-dorsal vertebrae with articular surface of parapophyses sad- dle-shaped*; (2) mid-caudal vertebrae with an accessory PCDL that subdivides the PO-CDF in two pneumatic fossae*; (3) first dorsal rib with honeycomb internal structure on its tuberculum; (4) prominent anterior projec- tion on the coracoid*; (5) coracoid without a subglenoid ridge *; (6) coracoid without a posteroventral fossa; and (7) and coracoid with ventromedial margin forming a dorsoventrally deep articular surface for the sternum*.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:39:15
Modified: 2009-01-03 22:39:15
Source: subo = suborder, o = order
References: Marsh 1875, Benton 1983

Age range: Early/Lower Maastrichtian or 72.20000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian72.2 - 66.0Argentina (Santa Cruz) Megaraptoridae indet. 1 (206968)