Issoca is a genus of land planarians found in Brazil.
Description Species of the genus Issoca are characterized by the presence of a spoon-shaped head having a cephalic retractor muscle, which allows those animals to pull their anterior end upwards and backwards. Associated to the muscle are cephalic glands, forming a so-called cephalic musculo-glandular organ in a way similar to the one found in the genera Choeradoplana and Luteostriata. The copulatory apparatus usually lacks a permanent penis papilla, i. e., the penis is formed during copulation by folds in the male cavity which are pushed outwards.Froehlich, C. G. (1955). Sobre Morfologia e Taxonomia das Geoplanidae. Boletim da Faculdade de Filosofia, Ciências e Letras da Universidade de São Paulo, Série Zoologia. 19: 195-279.Carbayo, F. (2010). A new genus for seven Brazilian land planarian species, split off from Notogynaphalia (Platyhelminthes, Tricladida). Belgian Journal of Zoology. 140: 91-101.
Etymology The name Issoca comes from Tupi içoca (worm, maggot).
Species There are five described species in the genus Issoca: Issoca assanga Araujo & Carbayo, 2018 Issoca jandaia Froehlich, 1955 Issoca piranga Froehlich, 1955 Issoca potyra Froehlich, 1957 Issoca rezendei (Schirch, 1929) Issoca spatulata (Graff, 1899)
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