Websteroprion armstrongi
| Websteroprion armstrongi | ||||||||||||
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| Temporal occurrence | ||||||||||||
| Emsium to Eifelium | ||||||||||||
| 407.6 to 387.7 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Websteroprion armstrongi | ||||||||||||
| Eriksson , Parry & Rudkin , 2017 |
Websteroprion armstrongi is a fossil annelworm belonging to the group of poly-bristles that lived about 400 million years ago. It was in 2017 by a research group led by Swedish scientist Mats E. Eriksson based on fossil jaw parts ( scolecodonts ) first described and according to the American bass player of the band Cannibal Corpse , Alex Webster has, as well as by Derek K. Armstrong, who found the remains and collected , named. The fossils represent the largest of the previously known paleontologically known mouthparts of sea worms and indicate a predatory worm more than a meter long.
description
The first description of Websteroprion armstrongi made on the basis of various polychaete for typical parts of the jaw, the scolecodonts . These were mainly three-dimensional casts and only partially actual traditional jaw parts. The jaws are the longest of all palaeontologically traditional mouthparts within the multi-bristle with a length of the maxilla of more than one centimeter and indicate a large and predatory marine worm.
The total length of the sea worm is estimated on the basis of the jaw elements to be more than one meter and thus corresponds to the bobbit worms ( Eunice aphroditois ) living today .
Location and chronological order
The fossils come from a collection of fossils from the Kwataboahegan Formation in Ontario , Canada . They are assigned to the early middle Devonian and are dated to an age of around 400 million years from the Emsian to Eifelian period.
Systematics and Etymology
The systematic assignment of the species took place in the also newly described genus Websteroprion , which was placed as a basal representative in the Aciculata due to the tooth structure . According to Eriksson and colleagues, Websteroprion has characteristics that correspond to those of the representatives of the Onuphidae and Eunicidae and thus justify an assignment to a common group Labidognatha. A specific assignment to one of the two families is not made (Incertae Familiae).
The genre was named after the bassist of the American death metal band Cannibal Corpse , Alex Webster . In the first description, Eriksson referred to Webster as a giants among the bass players and added 'prion' for "saw" to the name. ("Named after Alex Webster - a 'giant' of a bass player - combined with 'prion' meaning saw.") In 2006, Eriksson named the sea worm Kalloprion kilmisteri after the British musician Lemmy Kilmister and in 2012 Kingnites diamondi after the Danish musician King Diamond .
The species was named after Derek K. Armstrong, who found and collected the remains.
supporting documents
- ↑ a b c d e f Mats E. Eriksson, Luke A. Parry, David M. Rudkin: Earth's oldest 'Bobbit worm' - gigantism in a Devonian eunicidan polychaete Scientific Reports 7, 43061 (2017); doi : 10.1038 / srep43061
- ^ Mats E. Eriksson: Polychaete jaw apparatuses and scolecodonts from the Silurian Ireviken Event interval of Gotland, Sweden. GFF 128 (2), 2006; Pp. 97-101, doi : 10.1080 / 11035890601282097
- ↑ Mats E. Eriksson, Olle Hints, Claes F. Bergman: Kingnites diamondi gen. Et sp. nov., an exceptionally large Silurian paulinitid (Annelida; Polychaeta) from shallow marine settings of Baltoscandia. GFF 134 (3), 2012; S. 217–224 ( Abstract ( Memento of the original from March 14, 2014 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. )
literature
- Mats E. Eriksson, Luke A. Parry, David M. Rudkin: Earth's oldest 'Bobbit worm' - gigantism in a Devonian eunicidan polychaete Scientific Reports 7, 43061 (2017); doi : 10.1038 / srep43061