Editing Ganges shark (section)

==Taxonomy==
Formerly the Borneo river shark (''Glyphis fowlerae'') and the Irrawaddy river shark (''Glyphis siamensis'') were considered to represent two other species in the genus ''Glyphis''. They have recently been reclassified as ''G. gangeticus'' based on genetic studies, and their scientific names are treated as synonyms.<ref name=Li2015>{{cite journal |last1=Li |first1=C. |last2=Corrigan |first2=S. |last3=Yang |first3=L. |last4=Straube |first4=N. |last5=Harris |first5=M. |last6=Hofreiter |first6=M. |last7=White |first7=W.T. |last8=Naylor |first8=G.J.P. |title=DNA capture reveals transoceanic gene flow in endangered river sharks |journal=Proceedings of the National Academy of Sciences |year=2015 |volume=112 |issue=43 |pages=13302–13307|doi=10.1073/pnas.1508735112 |pmid=26460025 |pmc=4629339|bibcode=2015PNAS..11213302L |doi-access=free }}</ref>

The Borneo river shark is known only from the [[Kinabatangan River]] in [[Borneo]]. It can reach a length of {{convert|78|cm|abbr=on}}. Only 13 specimens are known to science, all collected in 1996. Expeditions in 2010 and 2011 failed to find any, and while fishermen recognised the shark, they have not been seen for many years.<ref name=Li2015/>

The Irrawaddy river shark is known only from a single museum specimen originally caught at the mouth of the [[Irrawaddy River]] in [[Myanmar]], a [[brackish-water]] locality in a large, heavily [[silt]]-laden river lined with [[mangrove forest]]s. It was collected in the 19th century and described as ''Carcharias siamensis'' by [[Austrians|Austrian]] [[ichthyologist]] [[Franz Steindachner]], in ''Annalen des Naturhistorischen Museums in Wien'' (volume 11, 1896).<ref name="fishbaseirra">{{FishBase |genus=Glyphis |species=siamensis |month=November |year=2009}}</ref> However, subsequent authors doubted the validity of this species, regarding it as an abnormal [[bull shark]] (''Carcharhinus leucas''), until in 2005 shark systematist [[Leonard Compagno]] recognized it as distinct member of the genus ''Glyphis''.<ref name="Martin"/> The specimen is a 60-cm-long immature male. It closely resembles the Ganges shark, but has more [[vertebra]]e (209 versus 169) and fewer teeth (29/29 versus 32&ndash;37/31&ndash;34).<ref name="Martin"/><ref name="compagno et al">{{cite book |author=Compagno, L.J.V. |author2=M. Dando |author3=S. Fowler |name-list-style=amp |title=Sharks of the World |publisher=Princeton University Press |date=2005 |isbn=978-0-691-12072-0 |page=309&ndash;311}}</ref>

A possibly [[undescribed species]] of ''Glyphis'' is known from [[Mukah]] in Borneo, as well as [[Bangladesh]]. The status of a Borneo specimen from [[Sampit]] remains unclear.<ref name=Li2015/>