Paraparchites pecosensis Crasquin, 2021

Tarnac, Anaëlle, Forel, Marie-Béatrice, Nestell, Galina, Nestell, Merlynd & Crasquin, Sylvie, 2021, Middle Permian ostracods (Crustacea) from the Guadalupe Mountains, West Texas, USA, European Journal of Taxonomy 770, pp. 1-60 : 26-27

publication ID

https://doi.org/10.5852/ejt.2021.770.1499

publication LSID

lsid:zoobank.org:pub:33F92DB8-3122-4F8E-995B-DBF260B3E390

DOI

https://doi.org/10.5281/zenodo.5550421

persistent identifier

https://treatment.plazi.org/id/E76693E7-FD8A-4E7B-9328-6D3248AC584F

taxon LSID

lsid:zoobank.org:act:E76693E7-FD8A-4E7B-9328-6D3248AC584F

treatment provided by

Felipe (2021-09-29 12:26:51, last updated 2024-11-26 00:56:05)

scientific name

Paraparchites pecosensis Crasquin
status

sp. nov.

Paraparchites pecosensis Crasquin sp. nov.

urn:lsid:zoobank.org:act:E76693E7-FD8A-4E7B-9328-6D3248AC584F

Figs 5D View Fig , 7D–H View Fig

Diagnosis

A species of Paraparchites with a small hemi-circular ridge at mid-H of PB on both valves and a weak overreach of RV above hinge-line.

Etymology

In reference to the Pecos River, West Texas, USA.

Material examined

Holotype USA • complete carapace, ( Fig. 7D View Fig ); Guadalupe Mountains , West Texas, Williams Ranch Member , Cutoff Formation , Quarry section, sample GM1; Roadian, Middle Permian; MNHN.F. F63404 View Materials .

Paratype USA • 1 complete carapace, ( Fig. 7H View Fig ); Guadalupe Mountains , West Texas, Williams Ranch Member , Cutoff Formation , Quarry section, sample GM1; Roadian, Middle Permian; MNHN.F. F63408 View Materials .

Additional material

USA • 1 complete carapace; Guadalupe Mountains , West Texas, Williams Ranch Member , Cutoff Formation , Quarry section, sample GM1; Roadian, Middle Permian; MNHN.F. F63405 View Materials 1 right valve; same locality as for preceding; Roadian, Middle Permian; MNHN.F. F63407 View Materials 1 right valve; Guadalupe Mountains , West Texas, ‘ McKittrick Canyon’ Member, Bell Canyon Formation, MKCS1 section, sample GM6; Capitanian, Middle Permian; MNHN.F. F63406 View Materials 1 complete carapace, 52 valves; Guadalupe Mountains , West Texas, Williams Ranch Member, Cutoff Formation, Quarry section, samples GM1, GM2, GM3; Roadian; MNHN.F. F63656 View Materials 15 valves; same locality as for preceding; ‘ McKittrick Canyon’ Member , Bell Canyon Formation , MKCS1 section, sample 2 (GM6), Capitanian; Middle Permian; MNHN.F. F63486 View Materials .

Dimensions

L= 503–2100 µm; H= 341–1467 µm ( Fig. 5D View Fig ).

Description

Carapace stocky (H/L=0.69–0.75) sub-rectangular in lateral outline; DB straight at LV; DB a little convex with weak overreach of RV above hinge-line; AB and PB quite equivalent with large radius of curvature, maximum of curvature around mid-H; VB nearly straight; LV overlaps RV all around free margins; presence of small hemi-circular ridge at mid-H of PB on both valves.

Occurrence

Samples GM1, GM2, and GM3, Quarry section, Williams Ranch Member, Cutoff Formation, Roadian; sample 2 (GM6), MKCS1 section, ‘McKittrick Canyon’ Member, Bell Canyon Formation, Capitanian; Guadalupe Mountains, West Texas, USA, Middle Permian (this work).

Remarks

Paraparchites pecosensis sp. nov. has a lateral outline similar to that of Paraparchites texanus Ulrich & Bassler, 1906 emend. Scott, 1959 from the Early Permian of Texas ( Scott 1959). The main difference between the two species is the small hemi-circular ridge at PB in the new species.

Scott H. W. 1959. The type species of Paraparchites Ulrich & Bassler. Journal of Paleontology 33: 670 - 674.

Ulrich E. O. & Bassler R. S. 1906. New American Palaeozoic Ostracoda. Notes and descriptions of the Upper Carboniferous genera and species. United States National Museum Paper 30: 149 - 164. https: // doi. org / 10.5479 / si. 00963801.30 - 1446.149

Gallery Image

Fig. 5. Height/length scatter plots of species from the Middle Permian (Roadian, Capitanian) of the Guadalupe Mountains (West Texas, USA). A-1, A-2, A-3. Three last juvenile stages before adult.

Gallery Image

Fig. 7 (next page). SEM micrographs of ostracods from the Middle Permian (Roadian, Quarry section, samples GM1 and GM2; Capitanian, MKCS1 section, samples 4 (GM5) and 2 (GM6)) of the Guadalupe Mountains (West Texas, USA). All specimens are temporarily housed in the collections of the Muséum national d’histoire naturelle, Paris, France (MNHN). A. Libumella cf. athabascensis Green, 1963, left lateral view of a carapace, sample GM1 (MNHN.F.F63401). – B. Fellerites? sp., external view of a right valve, sample GM1 (MNHN.F.F63402). – C. Paraparchites texanus Delo, 1930, right lateral view of a carapace, sample 4 (GM5) (MNHN.F.F63403). – D–H. Paraparchites pecosensis Crasquin sp. nov. D. Holotype, right lateral view of a carapace, sample GM1 (MNHN.F.F63404). E. Right lateral view of a carapace, sample GM1 (MNHN.F.F63405). F. External view of a right valve, sample 2 (GM6) (MNHN.F.F63406). G. External view of a right valve, sample GM1 (MNHN.F.F63407). H. Paratype, left lateral view of a carapace, sample GM1 (MNHN.F.F63408). – I. Acratia sp., right lateral view of a carapace, sample GM2 (MNHN.F.F63409). – J. Acratia cf. sinuata (Kozur, 1991), external view of a left valve, sample GM1 (MNHN.F.F63410). – K. Acratia sinuata (Kozur, 1991), external view of a left valve, sample GM1 (MNHN.F.F63411). – L–M. Bairdia radlerae Kellett, 1934. L. External view of a left valve, sample GM1 (MNHN.F.F63412). M. Right lateral view of a carapace, sample GM1 (MNHN.F.F63413). – N. Bairdia rhomboidalis Hamilton, 1942, right lateral view of a carapace, sample 2 (GM6) (MNHN.F.F63414). – O. Bairdia subfusiformis Hamilton, 1942, external view of a left valve, sample GM1 (MNHN.F.F63415). – P–R. Bairdia elcapitanensis Forel sp. nov. P. Right lateral view of a carapace, sample GM1 (MNHN.F.F63416). Q. Right lateral view of a carapace, sample GM1 (MNHN.F.F63417). R. Paratype, external view of a right valve, sample GM1 (MNHN.F.F63418). Scale bars: 100 µm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Ostracoda

SubClass

Podocopa

Order

Leiocopa

SuperFamily

Paraparchitoidea

Family

Paraparchitidae

Genus

Paraparchites