Mysidacea: Families, Subfamilies and Tribes
Lophogastridae G.O. Sars, 1870
Diagnostic description. Head
large, last 2 or 3 thoracic somites exposed dorsally.
Antenna (antenna 2) scale
without apical suture, outer margin serrated, without setae, without terminal spine.
left mandible lacinia mobilis well developed to lacinia mobilis reduced or absent (right mandible armed with fixed cusp in position of the lacinia mobilis), spine row absent, molar process well developed.
exopod small, unarticulated.
developed as a gnathopod, exopod reduced.
endopod with distinct carpus and propodus, propodus unsegmented. Branchiae on thoracopods present.
composed of seven pairs of oostegites.
Abdomen pleural plates well developed (fringed with backwardly projecting ventral spines). 6th & 7th abdominal somites incompletely fused.
biramous. Uropod endopod setose around entire margin, statocyst absent; exopod complete, outer margin entire. Telson apex entire.
. Lophogastridae contains 5 genera (34 species):
G.O. Sars, 1883 (1 species);
W.-Suhm, 1875 (1 species);
M. Sars, 1857 (21 species);
Hansen, 1910 (10 species);
Birstein & Tchindonova, 1962 (1 species).
. The Lophagastridae are generally considered pelagic mysids having a worldwide distribution, inhabiting both coastal and oceanic waters. As in the other members of the sub-order Lophogastrida these mysids display several primitive characters: thoracic gills, seven pairs of oostegites, incomplete fusion of the sixth and seventh abdominal somites, large, natatory female pleopods, absence of the right lacinia mobilis, and most noticable the absence of a statocyst in the endopod of the uropod.
(1997) for recent additions to the family Lophogastridae.
Cite this publication as: 'Meland, K. (2002 onwards). Mysidacea: Families, Subfamilies and Tribes. Version 1: 2 October 2002.