Schyschcatocrinus levis, Głuchowski, 2002

Głuchowski, Edward, 2002, Crinoids from the Famennian of the Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 47 (2), pp. 319-328 : 322

Schyschcatocrinus levis sp. nov.

Fig. 2F–H .

Schyschcatocrinus creber Dubatolova, 1975 ; Głuchowski 1981a: 41, pl. 3: 19 (partim).

Schyschcatocrinus creber Dubatolova, 1975 ; Głuchowski 1981b: 98–99, fig. 2 (partim).

Holotype: GIUS−4−91/13, Fig. 2H .

Type locality: Kadzielnia quarry, Kielce, Holy Cross Mountains.

Type horizon: Marly limestones, Palmatolepis rhomboidea to Palmatolepis marginifera zones.

Derivation of the name: From Latin levis , smooth.

Diagnosis.— Schyschcatocrinus species with flattened articular facet, smooth areola and very delicate culmina.

Material.—129 columnals.

Dimension of the holotype (in mm).—columnal diameter (KD) 2.8; luminal diameter (LD) 0.8; crenularial diameter (CD) 1.0; columnal height (KH) 1.5.

Description.—The columnals are medium−sized (2.5–4.0 mm) with smooth and gently convex latus. The articular facet is flattened with pentagonal to pentalobate lumen. Welldeveloped areola is smooth, bordered by crenularium composed of numerous (70–80) very delicate, sometimes dichotomous culmina.

Remarks.—The species differs from S. delicatus Głuchowski, 1993 from Givetian and Frasnian of Southern Poland in having a thicker stem composed of columnals with a wider and smooth areola, very delicate culmina and relatively wider lumen. Poorly preserved specimens from some localities were previously ( Głuchowski 1981a, b) classified as S. creber Dubatolova, 1975 .

Occurrence.—This species have been documented from Pa. crepida to S. praesulcata zones: Kadzielnia, Kostomłoty, Śluchowice, Miedzianka (sample Mi−B), Psie Górki (sample PG−B), Kowala (samples Ko−B and C), Ostrówka, Besówka and in the Pa. crepida to Pa. marginifera zones of the Moravia, Czech Republic (Mokrá quarry).

Schyschcatocrinus delicatus Głuchowski, 1993 ( Fig. 2E ).— The material contains 186 minute columnals with flattened articular facet. The areola is rather broad, bordered by crenularium composed of straight and relatively coarse culmina. Occurs in the Givetian–Frasnian of Southern Poland ( Głuchowski 1993) and also in the Famennian Pa. triangularis Zone of the Holy Cross Mts: Psie Górki (sample PG−A), Miedzianka (sample Mi−A), Kowala (sample Ko−A) and Cracow Region (Dębnik).

Figures

Fig. 2. A. Kasachstanocrinus sp., GIUS−4−445/4, Kostomłoty, × 20. B, C. Urushicrinus sp., GIUS−4−455/1−2, Psie Górki, sample PG−A, × 15. D. Anthinocrinus sp., GIUS−4−91/33, Kadzielnia, × 12. E. Schyschcatocrinus delicatus Głuchowski, 1993, GIUS−4−455/8, Psie Górki sample PG−A, × 15. F–H. Schyschcatocrinus levis sp. nov., GIUS−4−91/11−13, Kadzielnia; F, G × 15, H (holotype GIUS−4−91/13) × 12. I–J. Stenocrinus altus Sisova, 1988, GIUS−4−91/15−16, Kadzielnia, × 10. K–N. Calleocrinus kielcensis Głuchowski, 1993, GIUS−4−91/45−52, Kadzielnia, × 10. O–W. Cosmocrinus polonicus sp. nov., GIUS−4−91/3−9, Kadzielnia; O–Q × 7, R and S (holotype GIUS−4−91/3) × 5; T, U × 10.