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Hesperonyx martinhotomasorum

Osteichthyes

Taxonomy
Hesperonyx martinhotomasorum was named by Rotatori et al. (2024). Its type specimen is ML 2700, a set of limb elements, and it is a 3D body fossil. Its type locality is Praia de Porto Dinheiro, which is in a Kimmeridgian fluvial-deltaic siltstone/conglomerate in the Lourinhã Formation of Portugal. It is the type species of Hesperonyx.

Synonymy list
YearName and author
2024Hesperonyx martinhotomasorum Rotatori et al. p. e2310066:5

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
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()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Dryomorpha
genusHesperonyx
speciesmartinhotomasorum

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.

†Hesperonyx martinhotomasorum Rotatori et al. 2024
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Diagnosis
ReferenceDiagnosis
F. M. Rotatori et al. 2024Dryomorphan iguanodontian dinosaur differed from other iguanodontians by the following unique combination of characters: the cnemial crest of the tibia is laterally oriented, inner condyle forms a 90° angle with cranio/caudal axis of proximal end of tibia; articulation between fibula and tibia “interlocked”; having the fibula a protruding process that overhangs on the fibular condyle cranially; the distal shaft of the fibula develops a high crest and it is markedly twisted, reduced metatarsal I; claw-like pedal ungual phalanges.
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: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:40:05
Modified: 2009-01-03 22:40:05
Source: subo = suborder, o = order
References: Benton 1983, Kiessling 2004, Marsh 1875

Age range: Late/Upper Kimmeridgian or 152.21000 to 149.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Kimmeridgian152.21 - 149.2Portugal (Centro) Hesperonyx martinhotomasorum (type locality: 235263)