Australian Museum Journal Rhinobatos sainsburyi n.sp. and Aptychotrema timorensis n.sp.—two new shovelnose rays (Batoidea: Rhinobatidae) from the eastern Indian Ocean
- Shortform:
- Last, 2004, Rec. Aust. Mus. 56(2): 201–208
- Author(s):
- Last, Peter R.
- Year published:
- 2004
- Title:
- Rhinobatos sainsburyi n.sp. and Aptychotrema timorensis n.sp.—two new shovelnose rays (Batoidea: Rhinobatidae) from the eastern Indian Ocean
- Serial title:
- Records of the Australian Museum
- Volume:
- 56
- Issue:
- 2
- Start page:
- 201
- End page:
- 208
- DOI:
- 10.3853/j.0067-1975.56.2004.1415
- Language:
- English
- Date published:
- 07 July 2004
- Cover date:
- 07 July 2004
- ISSN:
- 0067-1975
- CODEN:
- RAUMAJ
- Publisher:
- The Australian Museum
- Place published:
- Sydney, Australia
- Digitized:
- 07 July 2004
- Available online:
- 07 July 2004
- Reference number:
- 1415
- EndNote package:
- EndNote file
- Title page:
- Title page (11kb PDF)
- Complete work:
- Complete work (144kb PDF)
Abstract
Two new shovelnose rays, Rhinobatos sainsburyi n.sp. and Aptychotrema timorensis n.sp., are described from the continental shelf off northwestern Australia. Rhinobatos sainsburyi belongs to an unresolved supraspecific complex that includes the type of the genus, R. rhinobatos (Linnaeus), and at least 9 other species that occur in the Indo-Pacific. Rhinobatos sainsburyi differs from these species by a combination of morphometry, squamation and colour. Aptychotrema timorensis, a third valid member of an endemic Australian genus, differs from its congeners in morphometry, and in having a narrower snout apex, fewer caudal vertebrae, and white spots on its dorsal surface.