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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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1941 Bythocypris concava Cooper, n.sp.; Cooper: p.28, pl.3, figs 3-6.

Material: Three carapaces and five valves.

Measurements: (two specimens measured) L= 457-578µm, H=229-289µm, H/L=0.5.

Remarks: The present specimens are assigned to Bythocypris concava Cooper, 1941 from the Late Carboniferous (Upper Mississippian) of Illinois, United States by the elongate outline, arched DB, slightly concave VB, straight PB having a high angle with PVB and the overlap along all margins (strongest along VB). The species is changed to the genus Pseudobythocypris Shaver, 1958 due to its postero-ventral slope meeting PB in a sharp angle.

Occurrence: Late Carboniferous - latest Permian. Illinois, United States; Anhui (samples CH 6-1-1 and CH 6-1-3, Dalong Formation of Chaohu Section), South China.

–  –  –

2007 Pseudobythocypris aff. procera (Coryell & Billings, 1932); Yuan et al.: p.182, pl.4, figs 11-12.

2007 Pseudobythocypris cf. centralis (Coryell & Billings, 1932); Yuan et al.: p.182, pl.4, figs 13-15.

Derivation of name: The species is named after the abbreviation of the localities, Guangxi (gui) and Guizhou (qian), South China.

Diagnosis: A species of the genus Pseudobythocypris with rounded AB, posteroventral slope meeting with posterodorsal border in an angle about 110º and maximum height of the carapace in front or at mid-length.

78 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Holotype: A complete carapace (pl. 4, fig. 13 in Yuan et al., 2007 and pl. 10, fig.1 here) from Dongpan section, Guangxi, collection number X0301-162.

Paratypes: A left valve (pl.4, fig.11 in Yuan et al., 2007 and pl. 10, fig. 2 here) from Dongpan section, Guangxi, collection number X0301-160; a right valve (pl. 10, fig. 3) from Shaiwa section, Guizhou, collection number X0301-228.

Material: Seven right valves and one left valve from siliceous mudstones of Shaiwa section, Guizhou;

five carapaces and thirteen valves from siliceous mudstones of Dongpan section, Guangxi; one carapace and nine valves from siliceous mudstones of Liuqiao Section, Guangxi.

Holotype: L=300µm, H=171µm, H/L=0.57; Paratypes: L=316-471µm,

Measurements:

H=158-224µm, H/L=0.48-0.49.

Description: Carapace tumid, bean-shaped in lateral view; DB arched or slightly arched, inclined to anterior and posterior border; VB straight or gently convex in LV and slightly concave in RV, AVB upward bent to meet the AB in a broad curve, PVB meets the PB in a angular curve to form an obtuse and distinct posterior angle; AB evenly rounded with maximum convexity about mid-height; PB obliquely rounded with larger curvature radius than AB and ended in an obtuse and distinct posterior angle, with maximum convexity lower than mid-height; maximum height slightly in front of or at mid-length; LV, larger, overlaps RV along DB and VB; surface smooth.

Remarks: In Yuan et al. (2007), the discovered specimens were respectively attributed to Pseudobythocypris cf. centralis by having the maximum height at mid-length and to Pseudobythocypris aff. procera by having the maximum height in front of mid-length and small H/L ratio. Here, the specimens found in Shaiwa section present intermediate characteristics between Pseudobythocypris cf.

centralis and Pseudobythocypris aff. procera sensu Yuan & Crasquin-Soleau, 2007 from the Dongpan section, Guangxi such as having the maximum height at mid-length as P. cf. centralis and small H/L ratio as P. aff. procera. So all the specimens found here and in the Dongpan section are assigned to unique species.

Occurrence: Latest Permian. Guangxi (beds 03DP2, 03DP3, 03DP5 and 03DP10, Dalong Formation of Dongpan Section; beds LQ3, LQ5, LQ16, LQ18, LQ22 and LQ51, Dalong Formation of Liuqiao Section) and Guizhou (samples SW13-10, SW13-11, SW13-12 and SW13-14, Linghao Formation of Shaiwa Section), South China.

–  –  –

Remarks: According to the sharp angle formed between the posteroventral slope and the PB, the specimens are compared with Pseudobythocypris guiqianensis n.sp. Compared with the latter, these specimens have straighter PB and more acute posteroventral angle.

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

–  –  –

2007 Pseudobythocypris sp.1; Yuan et al.: p.183, pl.4, figs 17-18.

Occurrence: Latest Permian. Guangxi (beds 03DP2, 03DP5 and 03DP7, Dalong Formation of Dongpan Section), South China.

Pseudobythocypris sp.2 Pl. 10, figs 13-15 Material: Five valves.

Measurements: (three specimens measured) L= 505-731µm, H=253-359µm, H/L=0.49-0.53.

Remarks: The specimens are assigned to the genus Pseudobythocypris Shaver, 1958 by an upswept postero-ventral slope meeting with PB in an angle. They are distinguished with other Pseudobythocypris species in the tumid valve, convex VB and somewhat tapering PB.

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

–  –  –

2007 Healdia sp.1; Yuan et al.: p.183, pl.5, fig.1.

80 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Occurrence: Latest Permian. Guangxi (beds 03DP2- 03DP4, Dalong Formation of Dongpan Section), South China.





–  –  –

Material: One valve.

Measurements: L=385µm, H=223µm, H/L=0.58.

Remarks: This specimen is assigned to the genus Healdia Roundy, 1926 by its sub-triangular outline, arched DB, slightly convex VB, broadly rounded AB and truncated PB. The strong posteriorly pointed spine on lateral surface makes this specimen different from the other Healdia species.

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

–  –  –

1961 Healdia thuringensis Gründel: 99, pl. 4, figs 3-5, pl. 14, fig. 4.

1962 Healdiopsis thuringensis thuringensis (Gründel, 1961); Gründel: 76, Tab. 2-4.

1981 Healdiopsis thuringensis (Gründel, 1961); Olempska: 42, pl. 5, fig. 4, Tab. 2.

1986 Healdia thuringensis Gründel; Bartzsch & Weyer: pl. 3, fig. 19.

1990 Healdia thuringensis Gründel; Becker: 35, pl. 1, fig. 4.

1990 Healdia thuringensis Gründel; Becker & Bless: 428, fig. 2-5.

1991 Healdiopsis thuringensis thuringensis (Gründel, 1961); Lethiers & Feist: 80, pl. 3, fig. 6.

1993 Healdia thuringensis Gründel; Becker et al.: 25, pl. 5, figs 1-9, pl. 6, figs 1-11.

1993 Healdiopsis thuringensis thuringensis Gründel, 1961; Blumenstengel: pl. 2, fig. 16.

1994 Healdia thuringensis Gründel, 1961; Blumenstengel: Tab.1.

1995b Healdia thuringensis Gründel; Becker & Blumenstengel: 69-71, figs 2-5, 4-4.

1997 Healdia thuringensis Gründel; Olempska: 316, figs 8D-F.

2007 Healdia thuringensis thuringensis (Gründel, 1961); Yuan et al.: p.183, pl.5, fig.2.

81 2008/5 PhD dissertation of University of Pierre Marie Curie & China University of Geosciences (Wuhan) Occurrence: Late Devonian - latest Permian. Montagne Noire, France; Holy Cross Mountain, Poland;

North Sauerland, Rhenish Massif; Thuringia, Germany; Guangxi (beds 03DP3, 03DP4 and 03DP5, Dalong Formation of Dongpan Section), South China.

–  –  –

Material: One valve.

Measurements: L=321µm, H=217µm, H/L=0.68.

Remarks: This specimen is compared to Marginohealdia sp.nov.2 sensu Crasquin-Soleau et al., 2008 from the Middle Permian of Sicily, Italy by the general outline, flattened AB and two strong spines at posterior part of the surface. The specimen here differs from the latter by the flattened PB, slightly concave VB and stronger spines.

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

Marginohealdia sp.1 Pl. 11, figs 4-9

Material: Nine valves.

Measurements: L=471-621µm, H=267-389µm, H/L=0.54-0.63.

Description: Valve sub-rectangular; DB straight and slightly inclined posteriorly, with length a little shorter than the maximum length; VB straight and parallel to DB, or slightly convex; AB rounded with the maximum curvature below mid-height; PB broadly rounded, having larger curvature radius than AB;

all margins flattened, the forefront of AB a little thickened to make appearance of the ridge; one circular ridge (with some gap at anterior vertical connection) at the central-posterior part of the lateral surface, with the diameter about half of the maximum length, dorsal part parallel to DB, ventral part a little convex towards VB, two spines erecting at the junction points between dorsal/vertical and posterior/ vertical parts; maximum height at anterior one third of the maximum length, maximum length at about mid-height; surface smooth.

82 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Remarks: Due to the posterior spines, the ridge on the central-posterior part and the ridge at the forefront of AB, the specimens here are assigned to the genus Marginohealdia Blumenstengel, 1965.

Occurrence: Latest Permian. Guizhou (samples SW13-12, SW13-13 and SW13-14, Linghao Formation of Shaiwa Section), South China.

–  –  –

Material: One valve.

Measurements: L=830µm, H=430µm, H/L=0.52.

Remarks: The present specimen is compared to Waylandella dartyensis Benson & Collinson, 1958 from the Lower Mississippian of Illinois, United States by the elliptical outline, concave VB, rounded AB and posteroventral spine. But the specimen here differs from the latter in the straight DB and posterodorsal slope.

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

–  –  –

Material: One valve.

Measurements: L=484µm, H=316µm, H/L=0.65.

Remarks: According to the strong posterior hollow spine and sub-triangular outline in lateral view, this specimen is assigned to the genus Triplacera Gründel, 1961 with doubt. It is noticeable that the strong spine is converged by two ridges on the middle to posterior part of the lateral surface. Between the two ridges, the surface is hollow.

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

83 2008/5 PhD dissertation of University of Pierre Marie Curie & China University of Geosciences (Wuhan)

–  –  –

Type species: Absina ectina Gründel, 1962.

Remarks: The genus Absina was established by Gründel in 1962 with the type species and Cypridina ?

unispinosa Gründel, 1961. In Gründel (1961, 1962), DB and VB are reversed so that the anterior beak was bent downward and considered as the myodocopid rostriform, consequently, the genus was assigned to the order Myodocopida. In 1979, Blumenstengel reversed the ventral and dorsal orientation of Absina (Heterma) unispinosa. Becker (1999), describing this genus in detail, gives it the present systematic position and this paper follows his assignation.

–  –  –

2007 Absina ? sp.1; Yuan et al.: p.185, pl.5, fig.8.

Material: Four valves.

Measurements: (two specimens measured) L=335-438µm, H=200-246µm, H/L =0.56-0.60.

Occurrence: Latest Permian. Guangxi (bed 03DP4, Dalong Formation of Dongpan Section; bed LQ51, Dalong Formation of Liuqiao Section), South China.

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

–  –  –

2007 Absina ?sp.2; Yuan et al.:p.185, pl.5, fig.9.

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

–  –  –

Material: One valve.

Measurements: L=270µm, H=183µm, H/L=0.68.

Remarks: This specimen is comparable to Genus 1 sp.1 sensu Crasquin-Soleau 1997 from the Early Permian (Artinskian) strata of Canada (South British Columbia) (Crasquin-Soleau, 1997, p.84, pl.7, fig.7.) by the lateral outline and the upwards bent PB. Our specimen has larger curvature radius of AB and straighter VB.

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

Podocopida indet.2 Pl. 11, fig. 14

Material: One incomplete valve.

Remarks: Maybe it is a fragment of Spinomicrocheilinella species. However, the preservation is too poor to do any precise assignation.

Occurrence: Latest Permian. Guizhou (sample SW13-13, Linghao Formation of Shaiwa Section), South China.

–  –  –

Material: Four valves.

Measurements: L=288-467µm, H=154-280µm, H/L=0.54-0.63.

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

–  –  –

Material: Three valves.

Measurements: (one specimen measured) L=521µm, H=314µm, H/L=0.60.

Occurrence: Latest Permian. Guizhou (samples SW13-11, SW13-12 and SW13-14, Linghao Formation of Shaiwa Section), South China.

–  –  –

Material: One carapace.

Measurements: L=210µm, H=145µm, H/L=0.69.

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

–  –  –

Material: One valve.

Measurements: L= 576µm, H=252µm, H/L=0.44.

86 Yuan Aihua: Latest Permian Deep-Water Ostracod (Crustacea) Fauna from South China 2008/5 Occurrence: Latest Permian. Anhui (sample CH3-3, Dalong Formation of Chaohu Section); South China.

–  –  –

Occurrence: Late Devonian - latest Permian. North Sauerland, Rhenish Massif; Guangxi (bed 03DP3-03DP5, Dalong Formation of Dongpan Section), South China.

–  –  –

2007 Polycope sp.1; Yuan et al.: p.186, pl.5, fig.12.

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

–  –  –

Material: Eleven valves.

Measurements: (three specimens measured) L=300-360µm, H=262-310µm, H/L=0.86-0.91.



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