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Indochelys spatulata
Taxonomy
Indochelys spatulata was named by Datta et al. (2000). Its type specimen is GSI 20380, a partial skeleton (Nearly complete shell), and it is a 3D body fossil. Its type locality is Pranhita River, Kota, which is in a Toarcian/Aalenian terrestrial limestone in the Kota Formation of India. It is the type species of Indochelys.
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Indochelys spatulata Datta et al. p. 102 figs. 3-5 |
| 2013 | Indochelys spatulata Pérez-García and Murelaga |
| 2014 | Indochelys spatulata Perea et al. |
| 2017 | Indochelys spatulata Joyce |
| 2020 | Indochelys spatulata Joyce and Bandyopadhyay |
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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.
†Indochelys spatulata Datta et al. 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. M. Datta et al. 2000 | Shell low, oval with tapered posterior, surface smooth, lacking ornamentation; nuchal bone large, almost encompassed by the first vertebral scute; nine neurals, broad and drum-shaped; eight paired costals arranged almost in parallel, first costal articulating only with first and second peripherals; eleven paired peripherals; two large and wide suprapygals, the anterior triangular, the posterior crescent-shaped; scutes thin, five broad vertebrals, the third one widest, covering half of the shell width, the fifth completely enclosed by the last paired marginals and paired supracaudals; cervical scute present, V-shaped with incurved anterior margin; no supramarginal scutes (shared with Kayentachelys); eleven paired, squarish, marginal scutes; four paired, pleural scutes longer than broad (shared with Proganochelys); plastron relatively small and narrow with truncated anterior margin not protruding beyond the cervical scute; a very small gap between carapace and plastron all along the anterior margin; plastron having eleven elements including a pair of mesoplastra; entoplastron broad, spatulate, extending to the anterior margin of the shell and separating the epiplastra (shared with Kayentachelys); paired gular scutes extend to entoplastron almost a third of its length; one pair of mesoplastra, narrowing towards the mid-line; plastro-carapace bridge one-third of shell length. | |
| W. G. Joyce and S. Bandyopadhyay 2020 | Indochelys spatulata can be diagnosed as a representative of Testudinata by the presence of a fully formed shell and as a representative of Mesochelydia by the presence of only eleven pairs of peripherals, absence of supramarginal scutes, and the reduction of the coracoid foramen. Among basal mesochelydians, Indochelys spatulata can be differentiated by having a distinct nuchal notch (closest to Kayentachelys aprix), a neural formula of 6p–4–8–4–6a–6a–6a–6a, lacking a contact between costal I and peripheral III, presence of a broad suprapygal II that blocks contact of costal VIII with peripheral XI (also in Eileanchelys waldmani), anteriorly shifted posterior pleural resulting in a short contact only between vertebral IV and pleural III (closest to Condorchelys antiqua), a chevron-shaped vertebral IV (closest to Condorchelys antiqua), and a free dorsal rib X. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Toarcian - Aalenian | India (Telengana) | Indochelys spatulata (207789) | |
| Toarcian - Aalenian | India (Maharastra) | Indochelys spatulata (type locality: 105522) |