Angelinoceras latum

Autor: Aubrechtov��, Martina, Korn, Dieter
Rok vydání: 2022
Předmět:
DOI: 10.5281/zenodo.6347610
Popis: Angelinoceras latum (Angelin, 1880) Figs 26���28, Table 7 Lituites latus Angelin, 1880: 9, pl. 11 figs 1���4. Lituites Hageni Remel��, 1880: 228, pl. 1 figs 4���5, pl. 3 fig. 3. Lituites Hageni ��� Remel�� 1890: 19, pl. 1 figs 4���5, pl. 3 fig. 3. Lituites latus ��� Jaanusson & Mutvei 1953: 18, fig. 3b. Angelinoceras latum ��� Sweet 1958: 132. ��� Balashov 1962: pl. 7 fig. 2. Lituites hageni ��� Neben & Krueger 1971: pl. 21 figs 4���5. Lituites cf. hageni ��� Neben & Krueger 1971: pl. 21 fig. 6. Diagnosis As for the genus. Type material Lectotype Not re-studied; the specimen figured by Angelin (1880: pl. 11 figs 1���4; illustration reproduced here in Fig. 26), from Vikarbyn (Dalarna, Sweden) and was found in the lower part of the Segerstad Limestone (Upper Red Orthoceratite Limestone, Aseri Regional Stage, middle Darriwilian, Middle Ordovician; designated and re-illustrated by Jaanusson & Mutvei (1953: 18, fig. 3b). Material examined GERMANY ��� 1 spec.; Brandenburg, Vierraden (Schwedt); Ordovician, Upper Grey Orthoceratite Limestone; Krueger 1974 Coll.; MB.C.11687 ��� 1 spec.; Brandenburg, Eberswalde; Ordovician; MB.C.11681 ��� 1 spec.; Brandenburg, Eberswalde railway station; Ordovician, Upper Red Orthoceratite Limestone; Remel�� 1878 Coll.; MB.C.11682 ��� 1 spec.; Brandenburg, Heegerm��hle; Ordovician, Upper Red Orthoceratite Limestone; Kgl. Forstakademie Eberswalde Coll.; MB.C.11683 ��� 2specs; Brandenburg, Niederfinow; Ordovician, Upper Red Orthoceratite Limestone; MB.C.30523, MB.C.30524 ��� 1 spec.; Brandenburg, Oderberg; Ordovician, Upper Red Orthoceratite Limestone; Neben Coll.; MB.C.30525. POLAND ��� 1 spec.; Silesia, probably Żory (former Sorau); Ordovician, Upper Red Orthoceratite Limestone; Kirchner Coll.; MB.C.11684. Description The seven specimens are fragments of the last whorl of the coiled part (coiling tight at least in the last whorl; 42���54 mm in diameter; WWI = 0.88���0.94; WER ah = 2.30���2.60; WER dm = 2.60���3.10). Only the specimen MB.C.11682 (Fig. 28A) has a short part of the uncoiled part (27 mm long; 29 mm whorl height) of the conch. The shell ornament consists of narrow annuli (up to 2 mm apart) and fine lirae in between (up to 1 mm apart); a ventral band flanked by ventrolateral ridges is formed on the venter (Fig. 27). Annuli may have pairs of raised lirae on their crests. Remarks Three of the seven specimens (MB.C.11681���MB.C.11683; Fig. 27) studied here are syntypes of Lituites hageni from Darriwilian erratics of northern Germany. R��diger (1889) and Dzik (1984) suggested that L. hageni is a junior synonym of Angelinoceras latum. This view is followed and supported here because the syntypes of L. hageni differ from the lectotype of A. latum (Fig. 26) only in the larger diameter of their coiled parts. Moreover, the additional specimen MB.C.30525, figured by Neben & Krueger (1971: pl. 21 fig. 6), is even smaller than the lectotype, while closely resembling all other investigated specimens. Geographic and stratigraphic occurrence Sweden (in situ) and northern Germany and northern Poland (in erratics within Pleistocene gravels); upper Kunda to Aseri (possibly up to lower Lasnam��gi) regional stages (middle to late Darriwilian, Middle Ordovician).
Published as part of Aubrechtov��, Martina & Korn, Dieter, 2022, Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician), pp. 1-108 in European Journal of Taxonomy 799 (1) on pages 41-43, DOI: 10.5852/ejt.2022.799.1681, http://zenodo.org/record/6341270
{"references":["Angelin N. P. 1880. Fragmenta silurica e dono Caroli Henrici Wegelin: Opus studio Nicolai Petri Angelin inchoatum jussu et impensis Academiae regiae scientiarum suecicae edendum curavit G. Lindstrom. Samson & Wallin, Stockholm [Holmiae]. https: // doi. org / 10.5962 / bhl. title. 63278","Remele A. 1880. Ueber einige neue oder seltene Versteinerungen aus silurischen Diluvialgeschieben der Gegend von Eberswalde. Festschrift fur die Funfzigjahrige Jubelfeier der Forstakademie Eberswalde: 179 - 252. Julius Springer, Berlin","Jaanusson V. & Mutvei H. 1953. Stratigraphie und Lithologie der unterordovizischen Platyurus - Stufe im Siljan-Gebiet, Dalarna. Bulletin of the Geological Institutions of the University of Uppsala 35: 7 - 39.","Hyatt A. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32: 349 - 647. https: // doi. org / 10.5962 / bhl. title. 59826","Sweet W. C. 1958. The Middle Ordovician of the Oslo region, Norway. 10. Nautiloid cephalopods. Norsk Geologisk Tidsskrift 38: 1 - 176.","Balashov Z. G. 1962. Otryad Tarphyceratida. In: Orlov Y. A. (ed.) Osnovy Paleontologii, Mollyuski- Golovonogie 1: 77 - 82. Akademiya Nauk SSSR, Moskva.","Neben W. & Krueger H. - H. 1971. Fossilien ordovizischer Geschiebe. Staringia 1: 1 - 50.","Rudiger H. 1889. Uber die Silur-Cephalopoden aus den mecklenburgischen Diluvialgeschieben. Philosophische Facultat, Universitat Rostock, Gustrow, Rostock. https: // doi. org / 10.5962 / bhl. title. 14078","Dzik J. 1984. Phylogeny of the Nautiloidea. Palaeontologia Polonica 45: 1 - 219."]}
Databáze: OpenAIRE
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