Quasimodaspis brentsae
| Quasimodaspis brentsae | ||||||||
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| Temporal occurrence | ||||||||
| middle to upper Cambrian | ||||||||
| 509 to 485.4 million years | ||||||||
| Locations | ||||||||
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| Systematics | ||||||||
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| Scientific name of the genus | ||||||||
| Quasimodaspis | ||||||||
| Wagoner , 2003 | ||||||||
| Scientific name of the species | ||||||||
| Quasimodaspis brentsae | ||||||||
| Wagoner , 2003 | ||||||||
Quasimodaspis brentsae is an extinct species of the arthropods from the Middle to Upper Cambrian .
features
The body had an egg-shaped shape and was about twice as long as it was wide (maximum length 14.1 mm, maximum width 7.9 mm.). The headstock was semicircular with a thickened front edge without spikes. The large, smooth eyes were relatively far apart. The trunk consisted of twelve overlapping tergites , which converged in short pleural spines. The last tergite was rather small and triangular in shape and extended into a tail spine with no grooves or crevices.
etymology
Quasimodo comes from White Sunday (Quasimodogeniti), where the first words of the antiphon from the epistle are Quasi modo geniti infantes ( German: "Like the newborn children"), and means something like "like" or "similar". This refers to the fact that the species occurs relatively early in the development of the arthropod. The addition of the Greek word aspis for shield refers to the strong shield-like appearance of the genus.
The specific epithet brentsae was chosen in honor of Melissa Brents, who found several specimens in spring 2002.
Locations
More than 15 specimens of this species have been found in the Emigrant Formation in the northern part of the Silver Peak Range in Esmeralda County , Nevada . The holotype (USNM 520681) and the other specimens (USNM 520682-520696) are now in the National Museum of Natural History in Washington, DC
Systematics
Wagoner placed the species in the order Aglaspidida , but according to van Roy 2006 it does not meet all the characteristics for the order in the strict sense . He therefore classified Quasimodaspis brentsae as an aglaspidida-like arthropod .
swell
literature
- Ben Wagoner: Non-trilobite arthropods from the Silver Peak Range, Nevada . Journal of Paleontology 77 (4), 2003: 706-720. HTML