Palmatolepis (Palmatolepis)

Belongs within: Palmatolepis. The type subgenus of Palmatolepis includes those Famennian species in which the S3–4 elements have a reduced bipennate morphology (Donoghue 2001). The baitfish of the Late Devonian Published 13 May 2024 Towards the end of the Devonian period, the pelagic zone of the sea was dominated by Palmatolepis. Over 100 species have… Continue reading Palmatolepis (Palmatolepis)

Osteostraci

Belongs within: Craniata. Boneshells In the modern day, jawless fishes represent a very small part of the surviving fauna, represented only by the eel- or worm-like hagfishes and lampreys. In the earlier part of the Palaeozoic, however, they were a much more significant component of piscine diversity. Among the most diverse of the jawless vertebrates… Continue reading Osteostraci

Anchignathodontidae

Belongs within: Spathognathodontidae. The Anchignathodontidae are a lineage of conodonts found from the early Carboniferous to the earliest Triassic (Sweet 1988). Galba among the conodonts Published 17 January 2024 The end-Permian extinction was the most devastating event to impact life on this planet that we know of. Wiping out over four-fifths of genera alive at… Continue reading Anchignathodontidae

Asterostomatidae

Belongs within: Irregularia. The Asterostomatidae are a possibly polyphyletic group of heart urchins characterised by the loss of petals and/or fascioles (Fischer 1966). Moving to the top when shifting to the depths Published 25 November 2023 In 1966, the Treatise on Invertebrate Paleontology volumes dealing with the stem-less echinoderms (sea urchins, sea stars, etc.) reached… Continue reading Asterostomatidae

Conodonta

Belongs within: Craniata.Contains: Furnishidae, Westergaardodina, Proconodontida, Conodonti. Conodonts were a major group of basal vertebrates from the Late Cambrian to the Triassic, mostly known from small phosphatised elements that are now interpreted as their teeth or tooth-plates (the only mineralised part of the animals). The life arrangement of these elements is commonly known as the… Continue reading Conodonta

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Categorised as Conodonta

Proconodontida

Belongs within: Conodonta. The Proconodontida are a lineage of conodonts characterised by thin-walled, smooth-surfaced, primarily coniform elements. These formed a relatively simple apparatus that typically lacked structures in the P positions (Sweet 1988). The earliest representative of the proconodontidans is the Late Cambrian Proconodontus, which possessed an apparently unimembrate apparatus of relatively large, deeply excavated,… Continue reading Proconodontida

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Categorised as Conodonta

Westergaardodina

Belongs within: Conodonta. Westergaardodina was a long-lived paraconodont genus found from the Middle or Late Cambrian to the Middle Ordovician. It had W- or U-shaped elements that Müller & Hinz-Schallreuter (1998) explained as growing through a combination of dorsal and/or lateral pressure being applied to points on a growing element. How the Westergaardodina elements were… Continue reading Westergaardodina

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Categorised as Conodonta

Conodonti

Belongs within: Conodonta.Contains: Prioniodontida, Clavohamulidae, Drepanoistodontidae, Acanthodontidae, Panderodontida, Scolopodus. The Conodonti are a major group of conodonts including those lineages derived from the Upper Cambrian to Lower Ordovician genus Teridontus, comprising the majority of familiar conodont species (Sweet & Donoghue 2001). Early Conodonti of the families Oneotodontidae and Protopanderodontidae typically had apparatuses composed of albid,… Continue reading Conodonti

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Categorised as Conodonta

Prioniodontida

Belongs within: Conodonti.Contains: Multioistodontidae, Prioniodontidae, Balognathidae, Cyrtoniodontidae, Prioniodinida, Ozarkodinida. The Prioniodontida are a group of conodonts characterised by the possession of apparatus including pastinate P elements, though they are believed to be paraphyletic with regard to the Ozarkodinida (with carminate P elements) and Prioniodinida (with digyrate P elements) (Sweet & Donoghue 2001). They first appear… Continue reading Prioniodontida

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Categorised as Conodonta

Icriodus

Belongs within: Balognathidae. Icriodus is a genus of conodonts known from the Devonian, characterised by the possession of a lanceolate, nodulose or ridged, P1 element. The remaining elements in the apparatus were mostly tiny and coniform (Sweet 1988). The genus may be polyphyletic, derived from multiple radiations of Latericriodus and/or Pelekysgnathus in shallow waters (Sweet… Continue reading Icriodus

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Categorised as Conodonta