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Helochelydra nopcsai

Reptilia

Taxonomy
Helochelydra nopcsai was named by Lapparent de Broin and Murelaga (1999). Its type specimen is BMNH R171, a partial skeleton (substantial portions of a highly fragmented shell with girdle elements), and it is a 3D body fossil. Its type locality is Isle of Wight (general), which is in a Barremian/Aptian terrestrial horizon in the United Kingdom. It is the type species of Helochelydra.

Synonymy list
YearName and author
1999Helochelydra nopcsai Lapparent de Broin and Murelaga pp. 185-192 figs. Pl. 7-8
2004Helochelydra nopcsai Milner p. 1457 figs. Text-figure 10A
2011Helochelydra nopcsai Milner p. 299 fig. 23.3C
2017Helochelydra nopcsai Joyce

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
RankNameAuthor
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
—Helochelydridae()
genusHelochelydraNopcsa 1928
speciesnopcsaiLapparent de Broin and Murelaga 1999

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.

†Helochelydra nopcsai Lapparent de Broin and Murelaga 1999
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Diagnosis
ReferenceDiagnosis
A. R. Milner 2004Species of Heleochelydra in which the hyoplastron has the following characters (see Text-fig. 10A): ventral surface covered with prominent raised discrete tubercles; border with entoplastron is straight, suture with epiplastron is angled with its distal end anterior to its medial end; suture with entoplastron occupies half of width of anterior ramus of hyoplastron; medial border between humeral and pectoral scutes not visible.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: c = class, subp = subphylum, uc = unranked clade
References: Carroll 1988, Hendy et al. 2009

Age range: base of the Late/Upper Hauterivian to the top of the Late/Upper Campanian or 136.40000 to 70.60000 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Hauterivian136.4 - 130.0Spain (Aragón) Helochelydra sp. (36367)
Late/Upper Hauterivian - Early/Lower Barremian136.4 - 125.45Spain (Castilla y León) Helochelydra sp., Solemydidae indet. (89271)
Late/Upper Hauterivian - Aptian136.4 - 113.0Spain (Castilla y Leon) Solemydidae indet. (89274)
Late/Upper Barremian - Early/Lower Aptian130.0 - 122.46Germany (North Rhine-Westphalia) Helochelydra sp. (152548)
Barremian - Early/Lower Aptian129.4 - 122.46United Kingdom (England) Tretosternum sp. (type locality: 92917)
Late/Upper Campanian83.5 - 70.6Spain (Castilla y Leon) Helochelydra nopcsai (28406)