Perissocytheridea florisdorsalis Tomé & Araripe & Oliveira & Barreto & Prado & Pedrosa & Pereira & Nascimento & Ng 2022, sp. nov.
Creators: name: Tomé, Maria Emilia
name: Araripe, Rilda
name: Oliveira, David
name: Barreto, Alcina
name: Prado, Ludmila
name: Pedrosa, Flavia
name: Pereira, Priscilla
name: Nascimento, Luiz Ricardo
name: Ng, Christiano
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Cytherideidae
Perissocytheridea
Perissocytheridea florisdorsalis

description: Perissocytheridea florisdorsalis sp. nov.
Fig. 5A–C
2022 Perissocytheridea sp.3 —Araripe et al., p 7, fig. 4 (3a–b).
Etymology: Floris (lat.) due to the design of a flower in the ornamentation of the carapace and dorsalis (lat.) marks the region and view in which the said design is observed.
Holotype: Adult C, Nº. DGEO-CTG-UFPE-1521 (Fig. 5A–C).
Type locality: Brazil, State of Pernambuco, Municipality of Exu, Sítio Santo Antônio section. Coordinates 7° 30’ 06” S and 39° 32’ 36” W.
Type horizon: Santo Antônio section, Araripe Basin. Shale (F1) corresponding to Romualdo Formation, depth 4.05 m, dated as upper Aptian.
Dimension. Nº. DGEO-CTG-UFPE-1521 (Fig. 5A–C); L= (LV) 0.373 / (RV) 0.356 mm, H= 0.189 mm, and W= 0.171 mm.
Diagnosis: Carapace very small, reticulated surface and a subtle caudal process at the dorsal margin. Additionally with a flower design in the dorsal view.
Description: Carapace very small. Sub-rectangular outline in lateral view. Ventral margin rectilinear on both valves. Dorsal margin straight descends to the posterior end. Anterior margin sub-rounded, beginning dorsally rectilinear and rounding up to ventral margin. Posterior margin sub-rectangular tapering to the caudal processes, which coincides with greatest length. Greatest height at anterior margin. Left valve slightly overlaps right valve. In the dorsal view the caudal process is evident, giving the posterior end a sharp appearance. Anterior margin also presents a sharp appearance. Surface with primary reticulations. Winged process discrete in the postero-ventral margin. Presents a lateral sulcus, where a flower-like design is seen in the dorsal view. Discrete ocular tubercle blending with ornamentation.
Observations. This species differs from others species to the genus described in this paper by the presence of a flower-shaped ornamentation in the dorsal view. However, a further detailed study with a larger population is needed to differentiate the male and others ontogenetic stages.
Occurrence and associated fauna. It was recorded in the Santo Antônio section, at the following depths (from base to top): 0.3; 2.25; 2.65; 3.1; 4.05; 3.55 and 5.45 m. Perissocytheridea florisdorsalis sp. nov. does not occur with Dicrorygma (Orthorygma?) dimorpha.
Stratigraphic distribution. Brazil, Araripe Basin, Romualdo Formation, upper Aptian.
description: Published as part of Tomé, Maria Emilia, Araripe, Rilda, Oliveira, David, Barreto, Alcina, Prado, Ludmila, Pedrosa, Flavia, Pereira, Priscilla, Nascimento, Luiz Ricardo & Ng, Christiano, 2022, Early Cretaceous Ostracoda (Crustacea) from south-centralAraripe Basin, Brazil with descriptions of seven new species, pp. 535-557 in Zootaxa 5159 (4) on pages 547-548, DOI: 10.11646/zootaxa.5159.4.4, http://zenodo.org/record/6786092