Gualtherus Carel Jacob Vosmaer

Gualtherus Carel Jacob Vosmaer (Oud-Beijerland, August 19, 1854 - Leiden, September 23, 1916 ) was a Dutch zoologist.[1]

Gualtherus Carel Jacob Vosmaer
Born19 August 1854
Died23 September 1916(1916-09-23) (aged 62)
Scientific career
Fieldszoology, sponges
Author abbrev. (zoology)Vosmaer


GCJ Vosmaer was born in 1854 in Oud-Beijerland, where his father, the poet and critic Carel Vosmaer was then a clerk at the subdistrict court. He studied in The Hague and subsequently at the University of Leiden, where he obtained his doctorate in 1880 with a thesis on sponges ("Leucandra aspera and the Canal System of Sponges"). In 1882 he became Anton Dohrn's assistant at his zoological station in Naples. In 1889 he returned to the Netherlands and became assistant to Professor Ambrosius Hubrecht in Utrecht. Later he became a private teacher and lecturer in Utrecht and in 1904 he became professor of zoology in Leiden.[1]


Vosmaer was a specialist in the field of sponges, describing many species. In Naples he examined the sponges in the Bay of Naples.[2]  He also described the sponges collected during the Willem Barents expedition to the North Atlantic and Arctic Ocean in 1880-1881[3]  and during the Siboga expedition of 1899-1900.[4][5]

The genus Vosmaeropsis Dendy, 1893, is named for him.


  1. ^ a b "Vosmaer, Gualtherus Carel Jacob - Historie van de Oceanografie Club". 2014-07-30. Archived from the original on 2014-07-30. Retrieved 2020-09-23.
  2. ^ Vosmaer, G.C.J. Sponges of the Bay of Naples: Porifera incalcaria, with analyses of genera and studies in the variations of species. OCLC 12114950. issued posthumously in 1933-1935
  3. ^ Vosmaer, G.C.J. (1885). "The sponges of the Willem Barents expedition 1880 and 1881". Bijdragen tot de Dierkunde. 12 (3): 1–47. (in this he described, among other things, the genus Artemisina)
  4. ^ Vosmaer, G., & Vernhout, J.H. The Porifera of the Siboga-expedition: 1. The genus Placospongia.{{cite book}}: CS1 maint: multiple names: authors list (link)
  5. ^ Vosmaer, G. (1911). The Porifera of the Siboga-Expedition. II. The genus Spirastrella.