Cypridea araripensis Silva, 1978

Filho, Marcos Antonio Batista Dos Santos, Ceolin, Daiane, Fauth, Gerson & Lima, Francisco Henrique De Oliveira, 2023, Ostracods from the Barbalha and Crato formations, Aptian of the Araripe Basin, northeast Brazil, Zootaxa 5319 (3), pp. 332-350 : 337-339

Cypridea araripensis Silva, 1978

Fig. 4.2A–B

2022 Cypridea araripensis Silva, 1978 .—Guzmán et al.: 5, Fig. 3.D–F . See this paper for a complete list of synonyms.

Material: Two molds.

Figured Specimen: ULVG-13489.

Dimensions:

	Length (mm)	Height (mm)	Width (mm)
ULVG-13489	0.6	0.3	-

Remarks: Though only molds of this species were recovered, they have preserved their ornamentation in great detail. It is possible to observe the rostrum, the reticulated ornamentation throughout the entire carapace, and small tubercles concentrated mainly in the anterior and posterior regions with some also being horizontally aligned in the median to ventro-median region as well. Notably, the molds of the tubercles point to the presence of fine ornamentation at their tips, consisting of around eight small nodule-like structures that surround a normal pore canal ( Fig. 4.2B ), similarly to what is observed in species such as Cypridea heliopolisensi Bischoff, 1963 . As the only Cypridea species formally described alongside species of Pattersoncypris for the Lower Cretaceous of Brazil is Cypridea araripensis , and the positioning of the tubercles preserved in these molds matches that species, the authors decided to place it under this classification.

Occurrences: PS-10-CE: AM-4 (104.20 m), AM-20 (55.40 m).

Stratigraphic and geographic distribution: Aptian, Barbalha Formation (this study), Romualdo Formation ( Coimbra et al. 2002; Guzmán et al. 2022), Ipubi Formation ( Coimbra et al. 2002; Guzmán et al. 2022), Crato Formation ( Silva 1978a; Berthou et al., 1994; Silva-Telles Jr & Viana 1990; Colin & Dépêche 1997, Coimbra et al. 2002; Guzmán et al. 2022), Araripe Basin, Brazil. Crato Formation, Jatobá Basin, Brazil ( Tomé et al. 2014). Middle to upper Aptian, Alagamar Formation, Potiguar Basin, Brazil ( Do Carmo et al. 2013).

Figures

FIGURE 3. Lithology of borehole 1PS-10-CE, as well as the names of the samples analyzed and the distribution of the ostracod taxa recovered. Modified from Fauth et al. (2023).

FIGURE 4. Plate illustrating the ostracod species recovered from the Barbalha and Crato formations, Araripe Basin. 1. Candonopsis? alagoensis Tomé, Lima Filho & Neumann, 2014. ULVG-13482, instar A-2. A—RLV, B—DV. 2. Cypridea araripensis Silva, 1978?.ULVG-13489,mold.3. BrasacyprissubovatumDo Carmo,Coimbra,Whatley,Antonietto&Citon,2013. ULVG-13490, instar A2. A—RLV, B—DV. 4. Damonella medialtis sp. nov. ULVG-14195, adult. A—RLV, B—DV, C—LLV. 5. Pattersoncypris cf. angulata (Kr̂mmelbein & Weber, 1971). ULVG-13483, instar A-2. A—RLV, B—DV. 6. Pattersoncypris micropapillosa Bate, 1972. ULVG-13486, instar A-2. A—RLV, B—DV. 8. Pattersoncypris salitrensis (Kr̂mmelbein & Weber, 1971). ULVG-13484, instar A-3. A—RLV, B—DV.