Astrochelys rogerbouri

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Astrochelys rogerbouri
Temporal range: Holocene
↓
Extinct (before 954 AD)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Testudinidae
Genus: Astrochelys
Species:
†A. rogerbouri
Binomial name
†Astrochelys rogerbouri
Kehlmaier et. al., 2023

Astrochelys rogerbouri is an extinct

Testudinidae which formerly lived in Madagascar
.

Discovery and naming

The type specimen, MNHN.F.MAD480, is a nearly complete

Muséum national d’histoire naturelle. This material was originally assigned as a juvenile specimen of Aldabrachelys abrupta, likely as the two share a type locality, and it was only found to represent a new species after DNA analysis.[1][2]

The specific name honors Roger Bour, a

herpetologist and expert on western Indian Ocean giant tortoises who helped in the investigation describing this species.[1]

Description

Astrochelys rogerbouri was a large tortoise species, with an estimated straight

mitochondrial genome shows deep genetic divergence, supporting its status as a distinct species.[1]

Ecology

In Ambolisatra, the presence of both A. rogerbouri and

Astrochelys radiata), but these records have not been genetically verified. The subfossil bones found in Ambolisatra assigned to Astrochelys radiata (as well as 3 other subfossil records of A. radiata and Astrochelys sp. outside the current range of the species) may represent Astrochelys rogerbouri. Though the remains identified as Aldabrachelys grandidieri from Ambolisatra are fragmentary and their assignment is questionable, Ambolisatra is geographically within the range of genetically-confirmed Aldabrachelys grandidieri records, and the species may indeed have coexisted with Astrochelys rogerbouri there. Ambolisatra is also near the northwestern limit of the radiated tortoise's current range, and within the range of the extant spider tortoise (Pyxis arachnoides). In total, 5 tortoise species undoubtedly formerly lived in southwestern Madagascar (the spider tortoise, the two extinct Aldabrachelys species, the radiated tortoise and Astrochelys rogerbouri), an exceptional level of sympatric tortoise diversity.[1]

Judging from the former sympatry of A. rogerbouri and the radiated tortoise, the two may have had different preferences in diet or habitat, and the angonoka tortoise may be hypothesized to have shared such preferences with A. rogerbouri.[1]

Extinction

It is unknown when A. rogerbouri became extinct, though it is believed to have survived until 1262 to 1069 years

AD) at least.[1]

References

  1. ^
    PMID 36630487
    .
  2. ^ "New species of large tortoise discovered after a century of mistaken identity". www.nhm.ac.uk. Retrieved 2023-02-12.

External links