GENUS Atractyliopsis PIA 1937 ex ACCORDI 1956

SPECIES Atractyliopsis darariensis ELLIOTT 1968

(by Anonymous)

1. Synonymy list

1968aAtractyliopsis darariensis n. sp.- Elliott, Pl. 2, fig. 3-5

1971Atractyliopsis darariensis.- Elliott, Pl. 118, fig. 3, from Elliott (1968a: Pl. 2, fig. 3)

2. Type(s)

holotype: Pl. 2, fig. 5, thin section N V.52037, G.F. Elliott Collection, British Museum (Natural History), London (United-Kingdom)

paratypes: Pl. 2, fig. 3, thin section N V. 52015; Pl. 2, fig. 4, thin section N V. 52037, British Museum (Natural History), London (United-Kingdom)

type locality: Ora, Mosul Liwa, N Irak (Irak)

stratum typicum: Upper Permian (Darari Fm, defined by R.G.S. Hudson {1958, Palaeontology, vol. 1, part 3, p. 174-192}, i.e. the upper unit of the Chia Zairi Limestone Formation)

3. Diagnosis


4. Description

original description (Elliott, 1968a):  Hollow cylindrical tubular structures, straight or gently curved, of up to 5.0 mm. observed length, 0.73 maximum external diameter: walls formed of a single layer of adjacent, touching or fused hollow spheres of 0.13 mm. internal diameter, original wall-thickness of spheres variable but 0.010-0.020 mm. in detached spheres. Primary calcification variable: the spheres may be more or less set in calcite formed by their walls, or almost isolated, with the outer surface of the cylinder truncating their outer curves, sometimes completely, to leave external openings, and their inner curves projecting roundly and unabraded into the cylinder-cavity. 

Measurements: (see above)

5. Remarks

6. Stratigraphic range

Late PERMIAN (Elliott, 1968a)

7. Real distribution

Irak (Elliott, 1968a)

8. Paleoecology

9. Figures