New ostracod species (Cypridopsis schwartzi n. sp.) from Texas, with discussion on the taxonomic status of Cypridopsis species in the USA

Abstract

A total of 39 taxa (19 living species, 20 subfossils) were collected from 59 different shallow aquatic bodies in Texas during April to June 2017. Cypridopsis schwartzi n. sp. is proposed as a new species collected from a cattle pond at Freeman Ranch near San Marcos, Texas. The species has several characteristics separating it from other species, including carapace shape, presence of a curved z3-seta on the second antenna, number of setae on the vibratory plate of the first thoracic leg, shape of hemipenis, numbers of whorls on the Zenker organ, and several other differences. With the new species, there are now 12 species in the genus Cypridopsis recorded for Texas, and Cypridopsis schwartzi n. sp. is the fifth species of the genus in Texas showing sexual reproduction. The new species was compared with other species of the genus in Texas and the taxonomic relationships are discussed.

A new genus, Tuberocandona gen. nov. (Crustacea, Ostracoda, Candonidae) and past to present ostracod species diversity in Texas (USA)

“…Contemporary studies on nonmarine ostracods (Külköylüoğlu et al 2011(Külköylüoğlu et al , 2017a(Külköylüoğlu et al , b, c, d, e, 2019(Külköylüoğlu et al , 2021(Külköylüoğlu et al , 2022Külköylüoğlu and Gibson 2018;Külköylüoğlu 2020;Külköylüoğlu and Tuncer, in press), as well as other taxonomic groups (Reddell and Mitchell 1969;Hall et al 2004;Segers 2008;Hutchins et al 2020;Gibson et al 2021), have clearly shown that the State of Texas contains highly unique species diversity and richness. However, knowledge about fossil fauna is not complete and there are gaps in the evolutionary record that need filling.…”

“…Over the last ten years or so, studies on the inland water ostracods of Texas have provided interesting results that highlight unique and high species diversity in the state (Külköylüoğlu et al 2021;Külköylüoğlu and Tuncer 2022). These studies, in total, revealed about 117 ostracod species.…”