Revision of the pulchella - group of Alona s. lato leads to its translocation to Ovalona Van Damme et Dumont, 2008 (Branchiopoda: Anomopoda: Chydoridae) Sinev, Artem Y. Zootaxa 2015 4044 4 451 492 Sinev & Silva-Briano, 2012 Sinev & Silva-Briano 2012 [194,800,1339,1366] Branchiopoda Ovalona Animalia Diplostraca 12 463 Arthropoda species anamariae comb. nov.  ( Figs. 5L– O)  Sinev & Silva-Briano, 2012: 9–13, Fig 5–6(  Alona).    Typelocality.La Araña dam, Sierra Fría, San Jos de Gracia, Aguascalientes, Mexico.   Typematerial.parthenogenetic female from the typelocation, MGU Ml 118; for list of paratypes, see Sinev & Silva-Briano (2012).  Material studied earlier.For list of material from Mexico, see Sinev & Silva-Briano (2012).   Diagnosis. Parthenogenetic female. General. Length of adult 0.33–0.36 mm. Body regular oval, of moderate height, height/length ratio about 0.66, maximum height at the middle of the body. Ventral margin with about 30–35 setae, distalmost seta in anterior group very long. Postero-dorsal angle with about 40 setulae not organized into groups.  Head. Posterior part of head shield broadly rounded. Three connected major head pores, PP about 0.2–0.3 IP. Lateral head pores minute.  Labrum. Labral keel moderately wide, with convex anterior margin, rounded apex, and posterior margin with two clusters of short setulae.  Second abdominal segmentwithout dense setulae. Postabdomenshort and broad, evenly trunated, length about 2.5 heights. Distal margin straight to weakly convex, distal angle not prominent, rounded. Postanal portion of distal margin straight, anal portion weakly concave. Dorsal margin with distal part 1.5 times longer than preanal one, anal part slightly longer than postanal. Preanal angle well-defined, postanal angle not defined. 5–6 well-developed slender marginal denticles, decreasing in size basally, and with 2–4 groups of marginal setulae on anal margin. Seven-eight moderately wide, sparsely spaced lateral fascicles of setulae, six-seven distalmost fascicles large, with distalmost seta of each fascicle slightly longer than neighboring marginal denticles. Postabdominal claw of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.2 of length of claw.   FIGURE 5. A–H,  Ovalona nigra(Smirnov, 1996), from Kotov et al. (2010). A–E, parthenogenetic female. A, lateral view; B, head pores; C, middle segment of abdomen; D, postabdomen; E, postanal margin of postabdomen; F–H, adult male. F, lateral view; G, postabdomen; H, distal portion of postabdomen; I–K,  Ovalona altiplana(Kotov, Sinev & Berrios, 2010), from Kotov et al. (2010), parthenogenetic female. I, lateral view; J, head pores; K, postabdomen; L–O,  Ovalona anamariae(Sinev & Silvabriano, 2012), from Sinev & Silva-Briano (2012), parthenogenetic female. L, lateral view; M, ventral margin of valves; N, head pores; O, postabdomen.  Antennulewith antennular seta about half length of antennule, arising at 2/3 distance from the base. Aesthetascs of different length, two longest of them of about half length of antennule.  Antennawith seta arising from basal segment shorter than endopodite. Spine on basal segment of exopodite longer than middle segment. Spines on apical segments slightly longer than apical segments.  Limb Iwith accessory seta about 1/3 length of ODL seta. Limb IIIwith exopodite seta 3 being longest, setae 6 about 1/3 length of seta 3, setae 1 and 4 about 1/4 length of seta 3, other setae shorter. Limb IVwith epipodite with moderately long projection. Exopodite with setae 1–3 of similar length, seta 5 about 2/3 length of seta 3, setae 4 and 6 two times shorter than seta 5. Flaming-torch setae with well-developed distal portion. Limb Vwith epipodite with moderately long projection. Exopodite seta 4 four times shorter than seta 1.  Ephippial femaleunknown.    Maleunknown.  Full description.See Sinev & Silva-Briano (2012)  Differential diagnosis.   O. anamariaediffers from all other species of the genus by small size, valves with very long distalmost ventral seta in anterior group, and by a short evenly truncated postabdomen.   Distribution.Known only from Aguascalientes State of Mexico, Central Mexican Plateau.