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Latona glacialis
Latona glacialis
Latona glacialis Latona glacialis
Phylum Arthropoda
Subphylum Crustacea
Class Branchiopoda
Suborder Cladocera
Family Sididae
Distinguishing Characteristics
  • Antennae with a large lateral expansion on basal joint of dorsal ramus
  • Ventral head plate with a long posterior outgrowth
  • Eye is situated dorsally
  • Postabdomen with 9 to 11 anal teeth
  • Long setae on posterior margin of valves
Taxonomic Notes
  • In 2008 Korovchinsky reinstated Latona glacialis as a valid species endemic to Greenland. The main distinguishing feature being a ventral head plate with a long posterior outgrowth (2). Initially two specimens of Latona were found in the Salmon Falls River Reservoir, New Hampshire / Maine which exhibited this feature. Further sampling uncovered two more specimens (one male) from Lake Christine in northern NH.
Additional Pictures

(1) KOROVCHINSKY, N.M. 1992. Sididae & Holopediidae. Guides to the Identification of the Microinvertebrates of the Continental Waters of the World 3. SBA Academic Publishers, The Hague, 82 pp.

(2) KOROVCHINSKY, N.M. 2008. Redescription of Latona setifera (O.F. Müller, 1776) from the type locality and reinstatement of Latona glacialis Wesenberg-Lund, 1894 (Crustacea: Cladocera: Sididae) as a valid species. Streenstrupia. 30: 1-19.