Oldest known West Gondwanan graptolite: Ovetograptus? sp. (lower Agdzian/lowest Wuliuan; basal Middle Cambrian) of the Franconian Forest, Germany, and review of pre-Furongian graptolithoids

Geyer, Gerd; Landing, Ed; Meier, Stefan; Höhn, Stefan

doi:10.1007/s12542-022-00627-5

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…Geyer et al . (2022, p. 5) illustrated and discussed a putative stolon in their material of Ovetograptus ? sp., but this structure is in fact the stem of the bushy colony, formed as a slender, parallel‐sided tube with distinct fusellar construction.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

Lerosey‐Aubril,

Maletz,

Coleman

et al. 2024

Papers in Palaeontology

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Pterobranchs are rare in Cambrian strata of North America despite discoveries of more than 30 exceptionally preserved fossil biotas. Miaolingian pterobranchs from this continent typically form low‐diversity and low‐abundance assemblages. Here we describe an abundant pterobranch material from the Drumian Marjum Formation recently collected at the Gray Marjum Quarry in the House Range of Utah, USA. The faunule is composed of two new species: Sphenoecium marjumensis, an encrusting representative forming compact bushy colonies of more than 80 tubes with poorly developed rhizomes, and Tarnagraptus cupidus, an erect growing taxon characterized by intertwining stems and a monopodial colonial growth. Known in extant rhabdopleurids, this mode of colonial growth had hitherto never been observed in fossil pterobranchs. Its documentation in a c. 500‐myr‐old taxon attests to its deep origin in the evolutionary history of the group. Although the new species almost exclusively occur in the Marjum strata, this pterobranch faunule is broadly similar to those recovered from other Miaolingian Burgess Shale‐type deposits of North America in terms of genus‐level composition, species richness, and ecological structure. This may indicate that pterobranchs were poorly diverse components of animal communities at that time, or that they mostly thrived in more proximal shelf environments where conditions conducive to their preservation rarely developed. The common co‐occurrence of taxa with fundamentally different ecomorphotypes in the Miaolingian Series of North America strongly suggests an earlier phase of morphological diversification of benthic pterobranchs during the early Cambrian, which remains insufficiently documented by fossils.

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Section: Systematic Palaeontologymentioning

confidence: 99%

Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

Lerosey‐Aubril,

Maletz,

Coleman

et al. 2024

Papers in Palaeontology

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Preface: Palaeontological papers written in honour of Professor Dr. Hans-Georg Herbig, a tribute and memorial

Amler,

Aretz,

Hartenfels

2023

PalZ

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Benthic graptolites (Graptolithina, Pterobranchia) in the Miaolingian (Cambrian Series 3)

Maletz

2023

Palaeobio Palaeoenv

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Benthic graptolites (Graptolithina) were surprisingly common and diverse in the Miaolingian (Cambrian), but have rarely been described in detail. Encrusting and erect growing colonies already evolved and can be differentiated in early Miaolingian faunas. The Rhabdopleuridae with their encrusting colonies provide few fossils, but members of the erect growing, bushy colonies of the Dithecodendridae are more common, at least as fragments indicating considerable fragmentation and transport. In the Wuliuan, the benthic graptolites reached a considerable diversity at the genus level with at least 6 genera appearing in this interval. The most common taxon is the encrusting genus Sphenoecium with its robust colonies, showing a worldwide distribution. Most taxa, however, are known from few records and their biostratigraphical and palaeogeographical distribution cannot be established yet. Erroneously, the widely distributed Tarnagraptus with its conical thecae has often been misidentified as the Ordovician Mastigograptus, but differs considerably in its tubarium construction and both might not be closely related.

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Oldest known West Gondwanan graptolite: Ovetograptus? sp. (lower Agdzian/lowest Wuliuan; basal Middle Cambrian) of the Franconian Forest, Germany, and review of pre-Furongian graptolithoids

Cited by 3 publications

References 25 publications

Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

Benthic pterobranchs from the Cambrian (Drumian) Marjum Konservat‐Lagerstätte of Utah

Preface: Palaeontological papers written in honour of Professor Dr. Hans-Georg Herbig, a tribute and memorial

Benthic graptolites (Graptolithina, Pterobranchia) in the Miaolingian (Cambrian Series 3)

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