Cyprideis inversa ( Purper & Pinto, 1983 )

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 : 31-32

Cyprideis inversa ( Purper & Pinto, 1983)

Fig. 6n ; Pl. 12, Figs. 15–19

* 1983 Sohnicythere inversa Purper et Pinto sp. nov. —Purper & Pinto: 119–120; Pl. 3, Figs. 12–24.

1998 Cyprideis inversa ( Purper & Pinto, 1983) —Muñoz-Torres et al.: 96; Pl. 3, Figs. 4–6 .

1998 Cyprideis inversa ( Purper & Pinto, 1983) —Whatley et al.: 234–235; Text-fig. 2; Pl. 1, Figs. 16–20.

2011 Cyprideis inversa —Linhares et al.: 95, 98; Fig. 3 /11.

Material. 60 valves; samples AM 10/15, 22, 28, 30.

Dimensions (total range over all samples). R ♀ l = 0.70, h = 0.37 (n = 1); L ♀ l = 0.67, h = 0.36 (n = 1); R ♂ l = 0.63, h = 0.33 (n = 1); L ♂ l = 0.58, h = 0.32 (n = 1).

Remarks. This comparably small Cyprideis species is characterised by its subtriangular outline in lateral view, its punctate ornamentation with scattered tubercles (pore conuli), well-developed, densely arranged spines along the entire anterior margin, up to seven posteroventral spines (only in left valves) as well as its inverse hinge and valve overlap ( Purper & Pinto 1983; Whatley et al. 1998). C. inversa occurs only sporadically within the core material, however, the available specimens match well with the given synonyms.

Occurrence. Western Amazonia ( Brazil, Colombia, Peru), late Middle to early Late Miocene ( C. caraionae – C. cyrtoma zone; Muñoz-Torres et al. 2006; chronostratigraphic correlation after Wesselingh & Ramos 2010).

Figures

FIGURE 3. Western Amazonian Cyprideis species groups. a: Phylogenetic model of Muñoz-Torres et al. (2006; Whatley et al. 1998); chronology and phylogenetic relations (stippled lines) redrawn form Muñoz-Torres et al. (2006); taxonomic rearrangements in group allocations in grey (C = Cyprideis, s. MT = sensu Muñoz-Torres et al. (1998), syn. = synonymous); b: herein proposed grouping, based exclusively on morphologic similarities (species without photographs = revision pending).

FIGURE 4. “Smooth” Cyprideis species of core 1AS-10-AM (except Figs. j–k = core 1AS-32-AM) photographed in transmitted light (external view) and focus stacked (scale bar = 200 µm; L/R = left/right valve; ♀/♂ = female/male; l/h = length/height [mm], specimen code = sample number_specimen number). a–c: C. amazonica, a: L♂ (0.84/0.46; AM10-39_44), b: R♀ (0.85/0.46; AM10-7_94), c: R♀ (0.74/0.42; AM10-39_42); d–f: C. machadoi, d: L♀ (1.09/0.58; AM10-23_66), e: L♀ (1.06/0.53; AM10-27_74), f: R♂ (1.08/0.51; AM10-27_73); g–k: C. kotzianae, g: R♂ (0.83/0.38; AM10-27_75), h: L♀ (1.00/ 0.46; AM10-30_36), i: R♂? (0.95/0.43; AM10-30_117), j: L♀ (0.87/0.41; AM32-5_26), k: R♀ (0.86/0.40; AM32-5_39); l–m: C. olivencai, l: L♀ (0.73/0.38; AM10-7_97), m: R♀ (0.75/0.38; AM10-7_96); n: C. kroemmelbeini, L♀ (0.83/0.41; AM10- 7_100); o: C. paralela, R♀ (0.61/0.30; AM10-30_100); p–r: C. multiradiata, p: L♀ (0.78/0.37; AM10-30_116), q: L♂ (0.89/ 0.38; AM10-30_114), r: R♂ (0.89/0.37; AM10-30_113).

FIGURE 5. Variation in length of right female valves (Rf) in core 1AS-10-AM of some more frequent Cyprideis species (min = minimum, max = maximum, max range/sa = maximum range within one sample; aside the box plots the number of measured specimens per sample is indicated).

FIGURE 6. “Ornate” Cyprideis species of core 1AS-10-AM photographed in transmitted light (external view) and focus stacked (scale bar = 200 µm; for abbreviations, see Fig. 4). a–b: C. cyrtoma, a: R♀ (0.73/0.37; AM10-27_15), b: R♀ (0.79/ 0.41; AM10-30_51); c: C. schedogymnos, R♀ (0.77/0.39; AM10-42_20); d: C. aff. graciosa, R♂ (0.95/0.48; AM10-30_68); e: C. minipunctata, R♀ (0.80/0.44; AM10-42_26); f: C. curucae, R♀ (0.80/0.42; AM10-23_06); g: C. pebasae, L♀ (0.67/0.36; AM10-27_79); h–i: C. munoztorresi, h: L♀ (0.74/0.39; AM10-15_23), i: R♀ (0.75/0.38; AM10-15_25); j–k: C. ituiae, j: L♀ (0.64/0.33; AM10-23_105), k: R♀ (0.68/0.35; AM10-30_118); l–m: C. matorae, l: L♀ (0.80/0.43; AM10-30_121), m: R♂ (0.81/0.39; AM10-30_120); n: C. inversa, L♂ (0.58/0.32; AM10-30_122); o: C. sulcosigmoidalis, R♀ (1.01/0.59; AM10- 7_47).