Also known as Halludden, Öland, Oland, glaukontithåltig grå vaginatumkalk, Lower Holen Limestone
Where: Kalmar, Sweden (57.4° N, 17.1° E: paleocoordinates 39.2° S, 9.1° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Didymograptus hirundo - Didymograptus bifidus graptolite zone, Gillberga Formation, Hunderum to Hunderum (471.8 - 466.0 Ma)
• "At the Hälludden section [...] the Kundan Gillberga Formation and the lowermost part of the Formation C (Stouge, 2004), Darriwilian, Middle Ordovician crops out. These Formations comprise the Lanna and Holen Limestones sensu Jaanusson (1982) (compare Ebbestad and Högström, 2007). [...] the Hälludden cephalopods described herein are exclusively from the early Darriwilian, Timeslice 4a of Webby et al. (2004) [i.e., the upper part of the Gillberga Fm.]"
•Since King & Evans (1990) state that the type of Phthanoncoceras oelandense comes from the lower Kunda of Hälludden these beds appareently are more or less identical to the "glaukontithåltig grå vaginatumkalk" of earlier collectors and contain the Didymograptus hirundo/D. bifidus Graptolite Zone (Bulmann, 1963, Palaeontology 6(4)).
• member-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; glauconitic, green, yellow wackestone
Size class: macrofossils
Preservation: cast, replaced with calcite
Collected by G. Holm, O. Holm in 19th and early 20th century
• " [...] the material reported here is from part of the collections of Gerhard and Olivia Holm at the Naturhistoriska Riksmuseet Stockholm, Sweden (RM, NRM-PZ Mo- numbers). Gerhard Holm was curator of the fossil collection of the Riksmuseet from 1901–1923 and during repeated visits in the 1890s and early 1900s to the Öland Island (Fig. 1) the two collected a great number of cephalopods, mainly from the Hälludden cliff [...] "
Primary reference: B. Kröger, Y. Zhang, and M. Isakar. 2009. Discosorids and Oncocerids (Cephalopoda) of the Middle Ordovician Kunda and Aseri Regional Stages of Baltoscandia and the early evolution of these groups. Geobios 42:273-293 [B. Kröger/T. Liebrecht/B. Kröger]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 89246: authorized by Björn Kröger, entered by Torsten Liebrecht on 12.05.2009, edited by Björn Kröger
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
"Orthambonites calligramma" = Orthambonites calligramme2
"Orthambonites calligramma" = Orthambonites calligramme2 Dalman 1828 | |
Cephalopoda | |
Palaeocycloceras eichwaldi4 Balashov 1968 | |
"Anthoceras vaginatum" = Endoceras vaginatum4
"Anthoceras vaginatum" = Endoceras vaginatum4 Schlotheim 1820 | |
Proterovaginoceras incognitum4 Schröder 1882 | |
Clinoceras dens5 Mascke 1876 | |
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Paldoceras neptunsakerense n. sp.
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Estonioceras sp.5 Noetling 1883 | |
Bentoceras proteus5 Holm 1899 | |
Kundoceras evansi n. gen. n. sp.
Kundoceras evansi n. gen. n. sp. Kröger et al. 2009 NRM-PZ Mo 158458a–c, 158694 (type), 161122; taxon identified as Piersaloceras sp. by King (1999)
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Richardsonoceras goldmanni n. sp., Richardsonoceras haelluddenense n. sp., Richardsonoceras gastroscopium n. sp., Richardsonoceras gerhardi n. sp., Richardsonoceroides rhytium n. sp., Richardsonoceroides schiefferdeckeri, Richardsonoceroides kingi, Richardsonoceroides oelandense n. sp., Neumatoceras "sp. A", ? Neumatoceras "sp. B", Neumatoceras parviborense n. sp., Neumatoceras borense n. sp., Paramiamoceras breviventrum n. sp.
Richardsonoceras goldmanni n. sp. Kröger et al. 2009 NRM-PZ Mo 158397, 191096, 97, 98 (type), 99, 16100, 01-04, 06-12
Richardsonoceras gastroscopium n. sp. Kröger et al. 2009 NRM-PZ Mo 14085, 154573, 75, 76, 161073, 75, 79, 80, 81 (type), 82-84
Richardsonoceras gerhardi n. sp. Kröger et al. 2009 NRM-PZ Mo 158408a, b, 158411 (fragment of type), 19 (fragment of type), 20, 161091, 92, 93-95
Richardsonoceroides rhytium n. sp. Kröger et al. 2009 NRM-PZ Mo 161043, 44, 45, 52-57, 161103, 13 (type)
Neumatoceras "sp. A" Foerste 1935 NRM-PZ Mo 161116, 17; taxon identified as Neumatoceras sp. by King (1999)
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Bathmoceras sp.5 Barrande 1865 | |
Phthanoncoceras oelandense n. gen. n. sp.1
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Adamsoceras holmi5 Troedsson 1926 | |
Hedstroemoceras haelluddense5 Foerste 1930
Cochlioceras avus5 Eichwald 1860 |