Paralytoceras crispum ( Tietze, 1870 )

Korn, Dieter & Weyer, Dieter, 2023, The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany), European Journal of Taxonomy 882, pp. 1-230 : 190-191

publication ID

https://doi.org/ 10.5852/ejt.2023.882.2177

publication LSID

lsid:zoobank.org:pub:67C909E4-C700-4F8D-B8CE-5FD9B2C5D549

DOI

https://doi.org/10.5281/zenodo.8187605

persistent identifier

https://treatment.plazi.org/id/03EA5C14-CAB4-85F1-FDF2-FE14FB6786DA

treatment provided by

Felipe

scientific name

Paralytoceras crispum ( Tietze, 1870 )
status

 

Paralytoceras crispum ( Tietze, 1870)

Fig. 116A View Fig

Clymenia crispa Tietze, 1869: 36 [nomen nudum].

Clymenia crispa – Tietze 1870: 135, pl. 16 fig. 12.

Sporadoceras (Paralytoceras) crispum – Frech 1902: 83, pl. 3 fig. 14.

Paralytoceras crispum – Schindewolf 1923: 397, text-fig. 11e. — Weyer 1965: 452, pl. 6 figs 2–4, text-fig. 2. — Dzik 1997: 109, text-fig. 29h. — Kullmann 2009: text-fig. 5.3.

Pseudarietites crispus – Ruan 1981: 92, pl. 22 figs 20–21.

Diagnosis

Species of Paralytoceras with conch reaching 60 mm diameter. Conch at 35 mm dm extremely discoidal, subevolute (ww/dm ~0.30, uw/dm ~0.40). Whorl profile at 35mm dm weakly compressed (ww/wh ~0.80); coiling rate moderate (WER ~1.95). Venter narrowly rounded with separate keel, umbilical margin rounded. Ornament with about 100 sharp, crenulated riblets with concave course on half a volution.

Material examined

Holotype

POLAND • Silesia, Dzikowiec ( Ebersdorf ); Gattendorfia Limestone ; Tietze Coll.; illustrated by Tietze (1870: pl. 16 fig. 12), Frech (1902: pl. 3 fig. 14), Weyer (1965: pl. 6 fig. 2), Dzik (1997: text-fig. 29h) and Kullmann (2009: text-fig. 5.3); MB.C.4692 .

Additional material

GERMANY • 1 specimen; Rhenish Mountains , Oberrödinghausen , railway cutting ; Hangenberg Limestone; Schmidt 1921 Coll .; BGR X1280 View Materials 1 specimen; Rhenish Mountains , Oberrödinghausen, railway cutting ; Hangenberg Limestone, bed 2; Vöhringer Coll.; MB.C.31223 1 specimen; Rhenish Mountains , Oberrödinghausen , railway cutting ; Hangenberg Limestone, bed 3c1; Weyer 1993–1994 Coll.; MB.C.31224 .

Description

Specimen MB.C.31223 was found in the unpublished parts of the Vöhringer collection; this so far unrecognised specimen is figured here ( Fig. 116A View Fig ). It is a fragment of a specimen with an original whorl height of about 14 mm. Its whorl profile is depressed with sinuous flanks slowly approaching the acute venter. The specimen shows sharp riblets, which originate from densely spaced collar-like structures. They extend in a shallow curve in forward direction across the flanks and end at the raised ventral keel. Near the venter, the riblets have a width of 0.6 mm, similar or identical with the width of the interspaces between the riblets. The entire flank bears spiral lines; these are much weaker than the riblets and occur between as well as on top of the riblets.

Remarks

Paralytoceras crispum differs from the other species of the genus in the wider umbilicus.

BGR

Bundesanstalt fur Geowissenschaften und Rohstoffe

Kingdom

Animalia

Phylum

Mollusca

Class

Cephalopoda

Order

Goniatitida

Family

Pseudarietitidae

Genus

Paralytoceras

Loc

Paralytoceras crispum ( Tietze, 1870 )

Korn, Dieter & Weyer, Dieter 2023
2023
Loc

Pseudarietites crispus

Ruan Y. 1981: 92
1981
Loc

Paralytoceras crispum

Kullmann J. 2009: 190
Dzik J. 1997: 109
Weyer D. 1965: 452
Schindewolf O. H. 1923: 397
1923
Loc

Sporadoceras (Paralytoceras) crispum

Frech F. 1902: 83
1902
Loc

Clymenia crispa

Tietze E. 1870: 135
1870
Loc

Clymenia crispa

Tietze E. 1869: 36
1869
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