Peralta M.A. Sistema de clasificacion de las setas de crustaceos Stygocarididae y Patagonaspididae (Anaspidacea) // Acta zoologica lilloana 54 (1–2): 43–60, 2010.
The cuticular extensions of species of the families Stygocarididae Noodt, 1963, and Patagonaspididae Grosso and Peralta, 2002 (Anaspidacea), were classified based on observations using optic and electronic microscopy. Considering the classification proposed by Watling (1989), in which the homology concept is applied to the setal morphology, 3 types of setae are recognized. Type I (setae with annulus, with setules), includes 2 groups, those of infracuticular articulation (categories: plumose, pappose, setulate, and setulodenticulate) and those of supracuticular articulation. Type II (setae with annulus, without setules, with infracuticular articulation) includes those that lack denticules (categories: simple, cuspidate, and aesthetasc) and those with denticules (categories serrate and teazel). Type III (setae without annulus, without setules, with infracuticular articulation) includes two groups, those that lack denticules (category: simple) and those with denticules (categories tooth, and coupling setae). Spiniform processes and two microsetae varieties are also recognized. Besides the setae, two other cuticular extensions were identified: spiniform processes and microsetae. Setae arrangements common to all species are described, indicating those that could be informative as ch aracters in phylogenetic studies: types and number of setae in pleomeres, antennae, maxilae, jaws, uropods and telson, and presence of setae with supracuticular articulation.
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