Description: English: Etmopterus granulosus. Date: 1881. Source: REPORT of the SCIENTIFIC RESULTS of the VOYAGE OF H.M.S. CHALLENGER DURING THE YEARS 1873-76 - ZOOLOGY Part VI (
Link -
Direct link). Author: Albert Günther, M.A., M.D., Ph.D., F.R.S., Keeper of the Department of Zoology in the British Museum.