“Minicryphaeus”的意思、由来-开放百科全书

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Minicryphaeus

释义

Etymology
Description
Taxonomy
References

{{italic title}}{{Taxobox
| fossil_range = {{fossilrange|411|408|Late Lower Devonian Pragian}}
| image = Minicryphaeus minimus dorsal CRF.jpg
| image_caption = Minicryphaeus minimus, 25 mm including spines
| image2 = Minicryphaeus minimus lateral CRF.jpg
| image_width = 240px
| regnum = Animalia
| phylum = Arthropoda
| classis = Trilobita
| ordo = Phacopida
| subordo = Phacopina
| superfamilia = Acastoidea
| familia = Acastidae
| subfamilia = Asteropyginae
| genus = Minicryphaeus
| genus_authority = Bignon & Crônier, 2013
| subdivision_ranks = Species
| subdivision ={{specieslist
|M. minimus|(Morzadec, 2001) (type) = Pseudocryphaeus minimus
|M. quaterspinosus|(Morzadec, 2001) = Pseudocryphaeus quaterspinosus
|M. sarirus|(Morzadec, 2001) = Pseudocryphaeus sarirus
|M. giganteus|Bignon, Corbacho & López-Soriano (2014)^[1]
}}
}}

Minicryphaeus is a genus of trilobite, that lived during the Pragian in what is today Morocco (Anti-Atlas).

Etymology

The name of this genus is a combination of the type species epithet minimus, with the genus it was originally assigned to, Pseudocryphaeus.^[2]

M. minimus was so-called for its small size compared to species of Pseudocryphaeus.
M. quaterspinosus is named after the fact that it has only four pairs of pygidial lappets.

Description

Taxonomy

Minicryphaeus was split-off from Pseudocryphaeus. The main differences are that in Minicryphaeus the genal spines are about 75% of the length of the glabella, the spaces between the lateral pygidial lappets are V-shaped, and the terminal spine is triangular and longer than the other lappets. In Pseudocryphaeus the genal spines are about half as long as the glabella, the spaces between the lappets are U-shaped, and the terminal spine is pentangular.^[2]

References

1. ^{{cite journal |author=Arnaud Bignon, Joan Corbacho and Francisco J. López-Soriano |year=2014 |title=A revision of the first Asteropyginae (Trilobita; Devonian) |journal=Geobios |volume=47 |issue=5 |pages=281–289 |doi=10.1016/j.geobios.2014.09.002 }}
2. ^¹²{{cite journal|last1= Bignon|first1= Arnaud|last2= Crônier|first2= Catherine|year= 2013|title= The systematics and phylogeny of the Devonian subfamily Asteropyginae (Trilobita: Phacopida)|journal= Journal of Systematic Palaeontology|pages= 1-32|doi=10.1080/14772019.2013.804008}}

3 : Acastidae|Devonian trilobites of Africa|Fossils of Morocco

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