Paramysis Czerniavsky 1882
Creators: name: Wittmann, Karl J.
name: Ariani, Antonio P.
name: Daneliya, Mikhail
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Mysida
Mysidae
Paramysis

description: Genus Paramysis Czerniavsky, 1882
Diagnosis. Paramysini with antennal scale showing a large, basal, smooth portion of the outer margin; this portion ending in a thorn (non-articulated spiniform process); setose apex bears a small apical segment with plumose setae (Figs 4 B, 8H). Eyes well developed with large, dorsoventrally slightly flattened cornea (Figs 4 A, 8A, B). Maxillary palp normal, its setose terminal segment laterally moderately (Fig. 9 C) to strongly expanded, with anterodistal setae only or with additional 1–3 short, subapical spiniform setae (Paramysis s.str.). First thoracic endopod (Fig. 9 D) large, 7-segmented, with endites on all segments from coxa to merus, the largest endite on the basis, endite of merus larger than endite of ischium. Thoracic endopods 3–8 (Figs 4 H, 9G, H, 10A, D, F, H) each with carpus entire, short, stout, with brush of setae; propodus normally 3-segmented, but reduced with fewer segments in posterior endopods of a few species; small to minute dactylus with normal to very weak nail, this nail may appear seta-like on endopod 8. Penis normal, with caudolateral blade (Figs 5 A, 9H). Male pleopods 3 (Figs 5 B, 10O) and 4 (Figs 5 C, 10P) each with two-segmented sympod; endopods 3 and 4 one- or two-segmented; exopod 3 rod-like, unsegmented; in contrast, exopod 4 is 6-segmented (Fig. 10 P, Q) to 7-segmented (Fig. 5 C, D) with one large, modified seta on both penultimate and ultimate segment. Male pleopods 1, 2, 5 (Figs 5 E, 10M, N, R), and all pleopods of females, reduced, rod like with allusively to weakly developed pseudobranchial lobe. Uropods setose all around (Figs 5 H, 10T), endopod shorter than exopod; statolith composed of vaterite or much less frequently of fluorite; variable numbers of spines below statocyst and often also more caudally along ventral face of endopod. Telson with spines along lateral margins; each lateral margin ends in a distinctly larger spine; terminal margin between these spines is transversely straight or excised, this margin furnished by at least two (as exceptional deviation with 0 or 1 in Paramysis s.str.), mostly many more acute laminae (Figs 5 J, 10U, V).
Type species. Paramysis Baeri Czerniavsky, 1882b: 56, as defined in Daneliya (2004).
Distribution (Figs 6, 12). Endemic in the NE-Atlantic, Mediterranean, and Ponto-Caspian. Anthropogenic expansion of P. l a cu s t r i s (Czerniavsky, 1882) and additional species to coastal waters and tributaries of the Baltic Sea, Lake Aral, and to inland water systems of northern and eastern Europe (Zhuravel 1950, Gasiunas 1968, Aladin et al. 1998, Wittmann 2007, Semenchenko et al. 2007, Zettler 2015).
description: Published as part of Wittmann, Karl J., Ariani, Antonio P. & Daneliya, Mikhail, 2016, The Mysidae (Crustacea: Peracarida: Mysida) in fresh and oligohaline waters of the Mediterranean. Taxonomy, biogeography, and bioinvasion, pp. 1-70 in Zootaxa 4142 (1) on page 14, DOI: 10.11646/zootaxa.4142.1.1, http://zenodo.org/record/261102