Axel Vilhelm Ljungman was a 19th century Swedish naturalist. He described many species of echinoderms.

From BEMON (http://www.bemon.loven.gu.se/):

"Uppsala zoologist, who after his dissertation mainly worked at the Vertebrate department of the Swedish Museum of Natural History, Stockholm; he founded the popular biological journal "Fauna och Flora" and was between 1925-42 the last prefect of the Kristineberg Marine Zoological Station. (After 1942 the station has been managed only by the local director)."

Relevant to the biota of the Gulf of Mexico, Mr. Ljungman has published the following:

Ljungman, A. 1871. Förteckning öfver uti Vestindien af Dr. A Goës samt under Korvetten Josefinas expedition i Atlantiska Oceanen smalade Ophurider. Ofversigt af Kongliga Vetenskaps-Akademiens Förhandlingar. Stockholm. 28(6): 615–658.