Cyprideis curucae, Gross & Ramos & Piller, 2014

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 : 27-28

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-FFB6-FFDC-71F4-DE73FA4FFD5E
treatment provided by	Felipe
scientific name	Cyprideis curucae
status	nom. nov.

Treatment

Cyprideis curucae nom. nov.

Fig. 6f View FIGURE 6 ; Pl. 8, Figs. 10 View FIGURE 10 –33

* 1983 Sohnicythere tuberculata Purper et Pinto gen. et sp. nov. —Purper & Pinto: 119; Pl. 3, Figs. 1 View FIGURE 1 -11. 1998 Cyprideis sp. 1 —Muñoz-Torres et al.: 102; Pl. 5, Figs. 1–2 View FIGURE 1 View FIGURE 2 .

1998 Cyprideis sp. 2 —Muñoz-Torres et al.: 102; Pl. 5, Figs. 3–4 View FIGURE 3 View FIGURE 4 [sic].

1998 Cyprideis sp. 2 —Whatley et al.: 237; Pl. 3, Figs. 11–13.

1998 Cyprideis sp. 3 —Whatley et al.: 237; Pl. 3, Figs. 14–15.

2011 Cyprideis sp. 1 —Linhares et al.: 95, 98; Figs. 4 View FIGURE 4 /7–8.

Material. 72 valves; samples AM 10/3, 19, 22–23, 27–28, 30.

Dimensions (total range over all samples). R ♀ l = 0.78–0.86 (0.83), h = 0.42–0.44 (0.43; n = 5); L ♀ l = 0.85–0.89 (0.87), h = 0.46–0.47 (0.47; n = 2); R ♂ l = 0.84–0.97 (0.92), h = 0.40–0.46 (0.43; n = 3); L ♂ l = 0.87–0.99 (0.93), h = 0.43–0.48 (0.46; n = 4).

Remarks. The specimens of sample AM10/30 (Pl. 8, Figs. 22–29) coincide with the original description of this species ( Purper & Pinto 1983) as well as with Cyprideis sp. 2 and Cyprideis sp. 3 of Muñoz-Torres et al. (1998), and Whatley et al. (1998), respectively. It is a subtriangular to subrectangular, reticulated to coarsely punctated Cyprideis with regularly spaced tubercles, one very long (mostly broken) posteroventral spine above which three shorter spines originate (only in right valves; Pl. 8, Figs. 30–31) and a comparably wide marginal zone ( Purper & Pinto 1983; Muñoz-Torres et al. 1998).

In samples AM10/27 and 19—where further well-preserved specimens are available—tubercles are less distinct, which cause the punctate ornamentation as well as the sulcus to come to the fore (Pl. 8, Figs. 10 View FIGURE 10 –21). Nevertheless, tubercles, which correspond to normal pore openings, are still observable (compare Pl. 8, Figs. 32 and 33) while other valve characters remain constant (compare for example Pl. 8, Figs. 18–19 with Figs. 26–27). Thus, the expression of tubercles/pore conuli as well as the reticulate/punctate ornamentation is considered to be ecologically controlled (compare i.e., tubercles in ilyocypridids; Yang et al. 2002; Gross et al. 2013).

Based on this observation the species Cyprideis sp. 1 of Muñoz-Torres et al. (1998 = Cyprideis sp. 2 of Whatley et al. 1998) can be included into this species (note that some tubercles are still visible on posterior (right valve) and anteroventral (left valve) parts of the shells on Figs. 11 and 13 (Pl. 3) of Whatley et al. 1998). Similarly, Cyprideis sp. 1 of Linhares et al. (2011) represents the weaker tuberculated variant of this taxon.

If tubercles are not very prominent, this species resembles C. aff. graciosa (see above; compare e.g. Pl. 6, Figs. 41–42 with Pl. 8, Figs. 18–19). However, C. curucae is well differentiated by: i) a wider inner lamella, ii) a more distal course of the selvage, iii) a restriction of anterior spines to the lower two-thirds of the anterior margin, iv) the lack of a smooth area at the anterior valve part, and, to a lesser degree, v) a thinner anterior marginal ridge and weaker developed hinge elements.

Originally, the species under discussion here has been named Sohnicythere tuberculata by Purper & Pinto (1983). However, Whatley et al. (1998) consider the genus Sohnicythere Purper & Pinto, 1983 as a junior synonym of Cyprideis . By applying this generic concept, S. tuberculata turns into “ Cyprideis tuberculata ( Purper & Pinto, 1983) ” (see Muñoz-Torres et al. 1998: 102), which is a secondary homonym (ICZN articles 53.3, 57.3) of the Central European, Late Miocene Cyprideis tuberculata (Méhes, 1908) . For this reason the substitute name Cyprideis curucae nom. nov. is introduced here (ICZN article 60.3; derivation of name: Rio Curuçá, where well 1AS-32-AM was drilled and the type material comes from; Purper & Pinto 1983, 1985).

Occurrence (of the synonyms Cyprideis sp. 1 –2 of Muñoz-Torres et al. 1998). Western Amazonia ( Colombia), latest Middle to early Late Miocene ( C. obliquosulcata – C. cyrtoma zone; Muñoz-Torres et al. 2006; chronostratigraphic correlation after Wesselingh & Ramos 2010).

4.6.3. pebasae subgroup

Species. C. pebasae , C. munoztorresi , C. ituiae , C. matorae ; possibly C. purperi colombiaensis but status unclear and re-examination pending.

Characters. Subrectangular to subtriangular; moderately small to medium sized; coarsely punctated to reticulated, asulcate to prominent sulcus; with antero- (both valves) and posteroventral spines (only right valves); moderately wide inner lamella, avestibulate; anterior essentially simple marginal pore canals; generotypic hinge.