1 Adhesive disc consists of rugae, two caeca. .........Rugogastridae (single genus Rugogaster) 1' Rugae absent, one caecum. ...................................2
2(1) Adhesive disc consists of single row of well separated suckers. .....Stichocotylidae (single genus Stichocotyle) 2' Adhesive disc consists of alveoli separated by septa. .......3
3(2) Single row of deep alveoli. ........Multicalycidae (single genus Multicalyx) 3' Three or four rows of shallow alveoli. ......................4
4(3) Hermaphroditic duct (joint male and female terminal ducts) present. ...Rohdellinae (single genus Rohdella) 4' Hermaphroditic duct absent ..................................5
5(4) Adhesive disc with three longitudinal rows of alveoli. ......................................... Cotylaspidinae ...6 5' Adhesive disc with four longitudinal rows of alveoli. ........................................ Aspidogastrinae ...8
6(5) Two testes. ...............................Cotylogaster 6' One testis. .................................................7
7(6) Cirrus-sac present. .........................Cotylaspis 7' Cirrus-sac absent. ..........................Lissemysia
8(5) Two testes. ................................Multicotyle 8' One testis. .................................................9
9(8) Cirrus-sac present. ........................................10 9' Cirrus-sac absent. .........................................11
10(9) Head lobes present. ........................Lobatostoma 10' Head lobes absent. ........................Aspidogaster
11(9) Papillae on part of adhesive disc. .........Lophotaspis 11' Papillae on adhesive disc absent ..........12
12(11) Ventral disk covers the posterior end of the body, genital pore located more anteriorly...........Neosychnocotyle 12' Ventral disk does not cover the posterior end of the body, genital pore located less anteriorly............Sychnocotyle
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Key to Families, Subfamilies, and Genera of Aspidogastrea
Klaus RohdeAbout This Page
Klaus Rohde
University of New England, Armidale, New South Wales, Australia
Page copyright © 1999 Klaus Rohde
Page: Tree of Life
Key to Families, Subfamilies, and Genera of Aspidogastrea
Authored by
Klaus Rohde.
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