Cyprideis minipunctata ( Purper & Ornellas, 1991 )

Gross, Martin, Ramos, Maria Ines F. & Piller, Werner E., 2014, On the Miocene Cyprideis species flock (Ostracoda; Crustacea) of Western Amazonia (Solimões Formation): Refining taxonomy on species level, Zootaxa 3899 (1), pp. 1-69 : 26-27

publication ID	https://doi.org/ 10.11646/zootaxa.3899.1.1
publication LSID	lsid:zoobank.org:pub:D78F2010-08E1-45C0-86FF-7F2D3601070D
persistent identifier	https://treatment.plazi.org/id/017587FE-FFB5-FFDD-71F4-D96DFB2FFDC5
treatment provided by	Felipe
scientific name	Cyprideis minipunctata ( Purper & Ornellas, 1991 )
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Cyprideis minipunctata ( Purper & Ornellas, 1991)

Fig. 6e View FIGURE 6 , Pl. 7, Figs. 32–35; Pl. 8, Figs. 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9

?pars 1980 Cyprideis purperi purperi subsp. nov. —Sheppard & Bate: 99–101; Text-fig. 2; Pl. 7, Figs. 1 View FIGURE 1 –11; Pl. 8, Figs. 1–2 View FIGURE 1 View FIGURE 2 . [non Pl. 7, Fig. 13 and probably non Fig. 12]

* 1991 Cytheridea minipunctata Purper & Ornellas , sp. nov. —Purper & Ornellas: 28–30; Pl. 2, Figs. 7 View FIGURE 7 –12.

1998 Cyprideis minipunctata ( Purper & Ornellas, 1991) —Muñoz-Torres et al.: 98; Pl. 3, Figs. 18–20.

1998 Cyprideis minipunctata ( Purper & Ornellas, 1991) —Whatley et al.: 235–236; Pl. 2, Figs. 11–15 [sic].

Material. 103 valves; samples AM 10/31, 39–40, 42.

Dimensions (total range over all samples). R ♀ l = 0.80–0.85 (0.82), h = 0.43–0.45 (0.44; n = 5); L ♀ l = 0.80–0.85 (0.83), h = 0.42–0.47 (0.45; n = 3); R ♂ l = 0.91–0.96 (0.94), h = 0.45–0.47 (0.46; n = 3); L ♂ l = 0.93–0.98 (0.96), h = 0.44–0.50 (0.47; n = 4).

Remarks. Our subovate–subrectangular, finely punctate specimens match well with the material of Purper & Ornellas (1991), Muñoz-Torres et al. (1998) and Whatley et al. (1998).

In part (except the specimens which clearly (Pl. 7, Fig. 13) or probably (Pl. 7, Fig. 12) belong to C. sulcosigmoidalis ) C. purperi purperi of Sheppard & Bate (1980) is very similar to C. minipunctata . As far as the available descriptions and figurations of both taxa enable a comparison, the main difference is the “smooth anterior marginal zone” ( Sheppard & Bate 1980: 100) in C. purperi purperi , whereas this area is covered by “shallow oval pits” ( Muñoz-Torres et al. 1998: 98) in C. minipunctata . Considering the variability herein observed and also mentioned by Muñoz-Torres et al. (1998: 98; some “have coarser puncta”), it is possible that C. minipunctata is a junior synonym of C. purperi purperi (compare variability of ornament in sample AM10/39; Pl. 7, Figs. 33, 35). However, this claim requires a reinvestigation of the material of Sheppard & Bate (1980).

C. minipunctata is very close to C. longispina , which is more coarsely punctated, anteroperipherally punctated or almost smooth anteroventrally, and has a weak “double” sulcus as well as an extended posteroventral flange, the latter carrying a longer posteroventral main spine on right valves ( Purper 1979; Muñoz-Torres et al. 1998; Gross et al. 2013).

Occurrence. Western Amazonia ( Brazil, Colombia, Peru), Middle Miocene ( C. aulakos – C. minipunctata zone; Muñoz-Torres et al. 2006; chronostratigraphic correlation after Wesselingh & Ramos 2010).