RODENTIA: HYDROCHOERIDAE— HEPTAXODONTIDAE 635 



Superfamily CAVIOIDEA 



Family Hydrochoeridae (capybaras) 



Subfamily hydrochoerinae 



Genus HYBROCHOERUS B9 Brisson 

 1762. Hydrochoerus Brisson, Regnura animale . . ., ed. 2, p. 12. (Type 



Hydrochoerus Brisson = Sus hydrochoeris Linnaeus.) 

 1772. Hydrochaeris Briinnich, Zoologiae fundamenta . . ., p. 44. (Type, 



"Elvesvinet=5u5 hydrochoeris Linnaeus.) 



Hydrochoerus isthniius Goldmanf * 



1912. Hydrochoerus isthmius Goldman, Smithsonian Misc. Coll., vol. 60, No. 2, 

 p. 11, Sept. 20, 1912. 



Type Locality. — Marraganti, near head of tidewater on Rio Tuyra, Darien, 

 eastern Panama. Range. — Drainage of Rio Tuyra, Darien, extreme eastern 

 Panama. Recorded also near Juan Mina, Rio Chagres basin, Canal Zone 

 (Trapido, Journ. Mamm., vol. 28, No. 4, p. 408, Dec. 1, 1947) , and Pacific coastal 

 swamps into which Rio Tocumen, Rio Cabuya and Rio Cabra empty, about 15 

 miles east of city of Panama (Trapido, Journ. Mamm., vol. 30, No. 1, p. 80, Feb. 

 14, 1949) . 



Family Heptaxodontidae 



Subfamily heptaxodontinae 



Genus HEPTAXODON Anthony 

 1917. Heptaxodon Anthony, Bull. Amer. Mus. Nat. Hist., vol. 37, p. 183, Jan. 

 29, 1917. (Type, Heptaxodon bidens Anthony.) 



Heptaxodon bidens Anthony 



1917. Heptaxodon bidens Anthony, Bull. Amer. Mus. Nat. Hist., vol. 37, p. 



183, Jan. 29, 1917. 

 Type Locality. — Utuado, Puerto Rico. Range. — Known from cave remains 

 only. 



Genus ELASMODONTOMYS Anthony 



1916. Elasmodontomys Anthony. Ann. New York Acad. Sci., vol. 27, p. 199, 

 Aug. 9, 1916. (Type, Elasmodontomys obliquus Anthony.) 



Elasmodontomys obliquus Anthony 



1916. Elasmodontomys obliquus Anthony, Ann. New York Acad. Sci., vol. 27, 



p. 199, Aug. 9, 1916. 

 Type Locality. — Utuado, Puerto Rico. Range. — Known from cave remains 

 only. 



Genus QUEMISIA Miller 



1929. Quemisia Miller, Smithsonian Misc. Coll., vol. 81, No. 9, p. 22, Mar. 30, 

 1929. (Type, Quemisia gravis Miller.) 



89 Brisson's "Regnum animale . . . regarded as non-Linnaean and not consistently binomial 

 by Hopwood, Proc. Zool. Soc. London, vol. 117, pts. 2-3, pp. 534, 535, Oct. 30, 1947. See also 

 Hershkovitz, Proc. Biol. Soc. Washington, vol. 62, p. 12, Mar. 17, 1939. 



