Order Rodentia - Family Echimyidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1575 1592 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Clyomys laticeps (Thomas 1909) [Echimys] laticeps Thomas 1909 , Ann. Mag. Nat. Hist., ser. 8, 4: 240 . Type Locality: Brazil , Santa Catarina , Joinville. Vernacular Names: Broad-headed Spiny Rat . Synonyms: Clyomys spinosus ( Winge 1887 ) . Distribution: Between Minas Gerais and Santa Catarina (E Brazil ) in savanna habitats. Conservation: IUCN – Lower Risk (lc). Common. Discussion: Highly fossorial and colonial. Karyotype has 2n=34 and FN=64 ( Yonenaga, 1975 ).