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The Fuxianhuiid exoskeleton is unmineralised, and the number of tergites ranges from 15 to over 40. The cephalon is covered by a head shield and contains stalked eyes connected by the anterior sclerite , antennae , a butterfly shaped hyposome and a posterior facing mouth.
Fuxianhuia is a genus of Lower Cambrian fossil arthropod known from the Chengjiang fauna in China.Its purportedly primitive features have led to it playing a pivotal role in discussions about the euarthropod stem group.
Guangweicaris is an extinct genus of fuxianhuiid arthropod known from the Cambrian period. It is only known from the type species Guangweicaris spinatus, which is known from the Cambrian Stage 4 Guanshan Biota near Kunming. It is currently the latest known fuxianhuiid.
Chengjiangocaris is an extinct genus of fuxianhuiid arthropod known from the Cambrian of South China. It contains two species, C. longiformis which was described in 1991. C. kunmingensis was described in 2013 by Javier Ortega-Hernández and colleagues. [1] [2] One specimen of C. kunmingensis shows detailed evidence of a nervous system. [3]
A Fuxianhuiid arthropod with numerous appendages. It is one of the most complete arthropods from the lower Cambrian. Reconstruction of Chengjiangocaris: Fuxianhuia. F. protensa; A large arthropod named after Fuxian Lake. Some adult specimens are found closely associated with numerous juveniles, indicating a level of parental care.
Typically, each body segment carries one pair of appendages. An appendage which is modified to assist in feeding is known as a maxilliped or gnathopod. [citation needed] In annelids lateral protrusions from the body are called parapodia. In echinoderms an appendage called a pedicellaria is found. The end of the pedicellaria consists of valves ...
A pilus (Latin for 'hair'; pl.: pili) is a hair-like cell-surface appendage found on many bacteria and archaea. [1] The terms pilus and fimbria (Latin for 'fringe'; plural: fimbriae) can be used interchangeably, although some researchers reserve the term pilus for the appendage required for bacterial conjugation.
Location of Fossils Branchiocaris [79] 1929 Wheeler Shale. Burgess Shale. Tokummia [80] 2017 Burgess Shale: Canadaspis [81] 1960 Burgess Shale. Pioche Shale. Maotianshan Shales. Waptia [82] 1912 Burgess Shale: Pectocaris [83] 1999 Maotianshan Shales: Clypecaris [83] 1999 Maotianshan Shales: Pauloterminus [84] 2002 Sirius Passet: Perspicaris [85 ...