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«To cite this version: Aihua Yuan. Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China. Pa- leontology. Universit´ Pierre et Marie ...»

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carapace elongate; DB broadly convex, ADB slightly concave, PDB convex; VB slightly concave to sub-straight, AVB sub-straight and inclined to meet with anterior beak; AB evenly rounded; PB acute and low; maximum height at or behind mid-length. In these specimens, compared to the specimens from the Late Permian of Guizhou, South China (Wang,1978) and Bükk Mts. of Hungary (Kozur, 1985b, Dzhulfian), some have much larger or smaller H/L ratio. But I consider it as the intraspecific variation. So the specimens in Wang (1978, pl.2, figs 14a, b) designated as F. arcuata by larger H/L and stronger overlap along DB are here assigned to F. parva. The specimen figured in Yi (2004, pl.2, fig.8) has much shorter carapace, convex ADB and sub-straight PDB which make its assignation to this species doubtful.

Occurrence: Middle-latest Permian; Guizhou (Longtan Formation and Changxing Formation of Anshun, Liuzhi and Qinglong) and Anhui (samples CH 6-1-1, CH6-1-2, CH6-1-3, CH 6-2-1, CH6-2-2, CH6-2-3, CH6-2-4, CH6-3-1, CH6-3-3, CH 6-3-4, CH6-3-5, CH6-4-4, Dalong Formation of Chaohu Section), South China; Bükk Montains, Hungary; Taurus, Turkey.

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2007 Fabalicypris cf. minuta Cooper, 1946; Yuan et al.: p.177, pl.3, figs 1-3.

Material: Eighteen carapaces and one valve.

Measurements: L=415-514mm, H=189-229µm, H/L=0.41-0.49, W/L=2.7.

Occurrence: Latest Permian. Guangxi (beds 03DP5 and 03DP10, Dalong Formation of Dongpan Section) and Anhui (sample CH 6-2-2, Dalong Formation of Chaohu Section), South China.

Fabalicypris sp.1 Pl. 7, figs 13, 14

Material: Nine carapaces and four valves.

Measurements: (four specimens measured) carapace: L=500-514µm, H=227-238µm, H/L=0.45-0.46;

valve: L=490-498µm, H=190-204µm, H/L=0.38-0.41 Remarks: These specimens are distinguished by their small size, broadly convex DB, sub-equally rounded AB and PB (with the maximum curvature below mid-height) and overlap along all margins except AB.

Occurrence: Latest Permian. Anhui (samples CH6-1-2 and CH 6-3-2, Dalong Formation of Chaohu Section), South China.

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2007 Absina cf.unispinosa (Gründel, 1961); Yuan et al.: p.185, pl.5, figs 4-7.

Material: Six valves and one carapace.

Measurements: (only complete specimens measured) L=222–312µm, H=130–165µm, H/L=0.53–0.59.

Remarks: In Yuan et al. (2007), the specimens from the Dongpan section were assigned to Absina cf.unispinosa (Gründel, 1961) based on the upward “rostriform”. However, as described in Yuan et al.

(2007, p.185), the specimens have not the postero-ventral spine which is a generic character for Absina.

The complete carapace found from the Xichang Section also do not possess the postero-ventral spine. It gives doubt to assign the specimens to the species Absina cf.unispinosa (Gründel, 1961). I assign the present specimens to the family Bairdiidae regarding the upward “rostriform” as the anterior beak.

Occurrence: Latest Permian. Guangxi (bed 03DP4, Dalong Formation of Dongpan Section; Dalong Formation of Xichang Section) and Guizhou (samples SW13-11 and SW13-12, Linghao Formation of Shaiwa Section), South China.

68 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5

–  –  –

Material: One valve.

Measurements: L=417µm, H=286µm, H/L=0.68.

Occurrence: Latest Permian. Guizhou (sample SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

Material: Three valves.

Measurements: L=292-526µm, H=142-244µm, H/L=0.47-0.49.

Remarks: In general outline, the present specimens are similar to Bythocypris sp. A sensu Crasquin-Soleau et al., 2006 from the Early Triassic strata of Guangxi, South China, but differ from the latter by having lower maximum curvature of PB, convex PDB, slightly concave VB and the maximum height at mid-length.

Occurrence: Latest Permian. Guizhou (samples SW13-3, SW13-11 and SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

Material: One valve.

Measurements: L994µm, H=429µm, H/L0.43.

Remarks: Due to the poor preservation, it is not permitted to give the specific assignation, although it is acratian without doubt.

Occurrence: Latest Permian. Guizhou (sample SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

2007 Cooperuna cf.tenuis Kozur, 1985; Yuan et al.: p.177, pl.2, fig.16.

Occurrence: Latest Permian. Guangxi (bed 03DP4, Dalong Formation of Dongpan Section), South China.

–  –  –

2007 Bythocytheridae gen et sp.indet; Yuan et al.: p.177-178, pl.3, fig.6.

70 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Occurrence: Latest Permian. Guangxi (bed 03DP2, Dalong Formation of Dongpan Section), South China.

–  –  –

Material: One valve.

Measurements: L=726µm, H=321µm, H/L=0.44.

Remarks: The poor preservation does not permit the further determination. This specimen is assigned to the family Bythocytheridae by its long and straight DB, sub-triangular outline and caudal process.





Occurrence: Latest Permian. Guizhou (sample SW 12-5, Linghao Formation of Shaiwa Section), South China.

–  –  –

2007 Monoceratina sp.1; Yuan et al.: p.179, pl.3, fig.8.

2007 Monoceratina ? sp.1; Yuan et al.: p.179, pl.3, fig.7.

Occurrence: Latest Permian. Guangxi (bed 03DP2, Dalong Formation of Dongpan Section), South China.

–  –  –

1975 Bohemina (Pokornina) ? sp. 1; Gründel & Kozur: 41, pl. 1, fig. 10.

2007 Bohemina (Pokornina) ? sp. 1 sensu Gründel & Kozur; Yuan et al.: p.179, pl.3, fig.11.

Occurrence: Early Permian-latest Permian. Timor(Kekneno series of Moetis region), Indonesia;

Guangxi (beds 03DP3 and 03DP5, Dalong Formation of Dongpan Section), South China.

–  –  –

Material: One valve.

Measurements: L=450µm, H=217µm, H/L=0.48.

Remarks: This specimen is compared with Bohemina (Pokornina) ? sp.1 sensu Gründel & Kozur, 1975 by its triangular outline, straight DB and truncated AB.

Occurrence: Latest Permian. Guizhou (sample SW11-11, Linghao Formation of Shaiwa Section), South China.

–  –  –

2007 Paraberounella ? cf. laterospina Kozur, 1991a; Yuan et al.: p.179, pl.3, figs 9-10.

Meterial: Three valves.

Occurrence: Latest Permian. Guangxi (bed 03DP5, Dalong Formation of Dongpan Section; bed LQ20, Dalong Formation of Liuqiao Section), South China.

72 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5

–  –  –

2007 Paraberounella sp.1; Yuan et al.: p.179, pl.3, fig.13.

Occurrence: Latest Permian. Guangxi (bed 03DP2, Dalong Formation of Dongpan Section), South China.

–  –  –

2007 Rectonariidae gen.et sp. indet.; Yuan et al.: p.179, pl.3, fig.12.

Occurrence: Latest Permian. Guangxi (bed 03DP3, Dalong Formation of Dongpan Section), South China.

–  –  –

2007 Rectonaria cf.inclinata Gründel, 1961; Yuan et al.: p.179-180, pl.3, fig.14.

Occurrence: Latest Permian. Guangxi (bed 03DP2, Dalong Formation of Dongpan Section), South China.

–  –  –

Type species: Denticupachydomella spinosa n. gen. n. sp.

Diagnosis: A new Pachydomellidae genus with LV having straight DB, two hornlike dorsal spines erecting at the ACA, one stronger spine at the PCA, three denticles along DB, one posteroventral spine and pustulous lateral surface.

Remarks: Denticupachydomella n.gen. is distinguished with other genera of Pachydomellidae by the special dorsal and lateral ornamentation.

Occurrence: Latest Permian. South China.

Denticupachydomella spinosa n.gen. n.sp.

Pl. 8, figs 10-15 Derivation: From the Latin spinosa-spinous.

Diagnosis: The same as genus.

Holotype: One complete carapace from LQ 16 (pl. 8, fig. 10), collection number X0301-183.

Paratypes: One left valve from LQ 16 (pl. 8, fig. 11), collection number X0301-184; one right valve from LQ 5 (pl. 8, fig. 13), collection number X0301-185; one left valve from LQ 16 (pl. 8, fig. 12), collection number X0301-186.

Material: Four left valves, five right valves and one carapace from siliceous mudstones and muddy siliceous rocks.

Measurements: (without the denticles and spine) Holotype: L=500µm, H=289µm, H/L=0.58 Paratypes: L=409-511µm, H=218-300µm, H/L=0.52-0.59 Description: Carapace small and tumid; LV larger than RV, LV overreach RV along whole margins, overlap reversed.

LV: DB straight and long, a little shorter than the maximum length of the carapace; CA distinct, ACA about 135º, PCA about 140º; two strong hornlike spines erecting at the ACA and one at the PCA, the posterior one larger, stronger and a little obliquely backward, another three smaller dorsal denticles protruding along the dorsum, evenly distributed between the cardinal spines; VB slightly convex; AB broadly rounded with the maximum curvature a little below mid-height; PB acutely rounded with the maximum curvature at mid-height, one or two spines protruding outward the valve at the posteroventral part; surface pustulous.

RV: DB broadly arched; VB slightly convex; AB evenly rounded and slightly compressed; PB acuminate and terminated by a strong, short and somewhat upwardly pointed spine; surface smooth or slightly pustulous.

Remarks: The spines protruding at the posteroventral part of LV may be different in numbers and strength. On the present valves, I have not found out the direct relationship between spine character and ontogeny. In addition, the tumid carapace and overlap type give appearance of the genus 74 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Microcheilinella Geis, 1933 or Spinomicrocheilinella Kozur, 1985a, but the new genus and species can be easily distinguished by the very special ornamentation.

Occurrence: Latest Permian. Guangxi (beds LQ5-LQ16, Dalong Formation of Liuqiao Section), South China.

–  –  –

1981 Newsomites cf. elatus Lethiers, 1978; Lethiers: 72, pl. 14, figs 136a, c.

2007 Microcheilinella cf. elatus (Lethiers, 1978) sensu Lethiers, 1981; Yuan et al.: p.180, pl.3, fig.5.

Occurrence: Late Devonian - latest Permian. NW Canada; Guangxi (beds 03DP3 and 03DP5, Dalong Formation of Dongpan Section), South China.

–  –  –

1975 Microcheilinella aculeata sp.nov.;Buschmina: 44, pl. 2, fig. 11.

1981 Microcheilinella aculeata Buschmina; Olempska:45, pl. 7, figs 2a-c.

1988a Microcheilinella aculeata Buschmina; Wang: 280, pl. 2, figs 20-22.

1997 Microcheilinella aculeata Buschmina; Olempska: 318, pl. 17, figs C-E.

2007 Microcheilinella aculeata Buschmina, 1975; Yuan et al.: p.180, pl.4, fig.16.

Occurrence: Early Carboniferous - latest Permian. Kolyma Massif, Russia; Holy Cross Mountains, Poland; Guangxi (Wangyou Formation of Nandan; bed 03DP10, Dalong Formation of Dongpan Section), South China.

–  –  –

Material: One carapace.

Measurements: L=303µm, H=182µm, H/L=0.6.

Remarks: Although the specimen is poorly preserved, the strong overlapped and swollen carapace presents the prominent characteristics of the genus Microcheilinella.

Occurrence: Latest Permian. Guizhou (sample SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

2007 Spinomicrocheilinella anterocompressa Yuan & Crasquin-Soleau n.sp.; Yuan et al.: p.180-182, pl.4, figs 1-3.

Material: Fifty-three carapaces and fifty-eight valves.

Occurrence: Latest Permian. Guangxi (beds 03DP2, 03DP3, 03DP5, 03DP7 and 03DP10, Dalong Formation of Dongpan Section; beds LQ16, LQ18 and LQ22, Dalong Formation of Liuqiao Section), South China.

–  –  –

2007 Spinomicrocheilinella aff. dargenioi Kozur 1991a; Yuan et al.: p.182, pl.4, figs 5, 6.

non 2007 Spinomicrocheilinella aff. dargenioi Kozur 1991a; Yuan et al.: p.182, pl.4, figs 4, 7.

Material: Four valves.

Measurements: (with the spine) L=230-764µm, H=120-400µm, H/L=0.49-0.52.

Remarks: Due to the poor preservation of the only RV, the present specimens are compared to Spinomicrocheilinella dargenioi Kozur, 1991a from the late Middle Permian – early Late Permian of Sicily, Italy according to the elliptical and tumid valve and the posterior spine of RV. The specimens are the same as those figured in Yuan et al. (2007, pl.4, figs 5, 6). The other two specimens (figured in Yuan et al., 2007, pl.4, fig.4, 7) are excluded from this assignation to S. aff. dargenioi by the PB with small curvature radius, broadly arched DB and straight hinge line.

76 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Occurrence: Latest Permian. Guangxi (beds 03DP3 and 03DP2, Dalong Formation of Dongpan Section) and Guizhou (sample SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

2007 Spinomicrocheilinella sp.1; Yuan et al.: p.182, pl.4, figs 8, 9.

Occurrence: Latest Permian. Guangxi (beds 03DP2-03DP5, Dalong Formation of Dongpan Section), South China.

–  –  –

2007 Spinomicrocheilinella sp.2; Yuan et al.: p.182, pl.4, fig.10.

Material: Two valves.

Measurements: (with the spine) L=285-378µm, H=140-185µm, H/L=0.49.

Remarks: These specimens are distinguished by the nearly vertical PB and long and sub-straight DB.

Occurrence: Latest Permian. Guizhou (sample SW13-12, Linghao Formation of Shaiwa Section), South China.

–  –  –

Remarks: According to its elliptical outline, arched DB, sub-straight VB and a posterior spine, the specimen is assigned to the genus Spinomicrocheilinella Kozur, 1985a.

Occurrence: Latest Permian. Guizhou (sample SW13-14, Linghao Formation of Shaiwa Section), South China.

–  –  –



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