Xandarella Explained

Xandarella is an extinct genus of xandarellid artiopodan known from the Cambrian of China, the type species Xandarella spectaculum was described in 1991 from the Cambrian Stage 3 aged Chengjiang Biota in China.[1] Although an additional species Xandarella mauretanica was described from the Cambrian Stage 5 Tatelt Formation in Morocco in 2017, which preserved only the ventral anatomy,[2] it is later found that is a species of trilobite Gigoutella instead.[3] Like other Xandarellids, the exoskeleton is unmineralised. The cephalon has pronounced eye slits, presumably derived from ancestral ventral stalked eyes.[4]

Notes and References

  1. Book: Hou, Xianguang.. Arthropods of the Lower Cambrian Chengjiang fauna, southwest China. 1997. Univ.-Forl. 82-00-37693-1. 614008940.
  2. Ortega-Hernández. Javier. Azizi. Abdelfattah. Hearing. Thomas W.. Harvey. Thomas H. P.. Edgecombe. Gregory D.. Hafid. Ahmid. El Hariri. Khadija. March 2017. A xandarellid artiopodan from Morocco – a middle Cambrian link between soft-bodied euarthropod communities in North Africa and South China. Scientific Reports. en. 7. 1. 42616. 10.1038/srep42616. 2045-2322. 5314411. 28211461. 2017NatSR...742616O.
  3. El Albani . Abderrazak . Mazurier . Arnaud . Edgecombe . Gregory D. . Azizi . Abdelfattah . El Bakhouch . Asmaa . Berks . Harry O. . Bouougri . El Hafid . Chraiki . Ibtissam . Donoghue . Philip C. J. . Fontaine . Claude . Gaines . Robert R. . Ghnahalla . Mohamed . Meunier . Alain . Trentesaux . Alain . Paterson . John R. . 2024-06-28 . Rapid volcanic ash entombment reveals the 3D anatomy of Cambrian trilobites . Science . en . 384 . 6703 . 1429–1435 . 10.1126/science.adl4540 . 0036-8075.
  4. Chen. Xiaohan. Ortega-Hernández. Javier. Wolfe. Joanna M.. Zhai. Dayou. Hou. Xianguang. Chen. Ailin. Mai. Huijuan. Liu. Yu. December 2019. The appendicular morphology of Sinoburius lunaris and the evolution of the artiopodan clade Xandarellida (Euarthropoda, early Cambrian) from South China. BMC Evolutionary Biology. en. 19. 1. 165. 10.1186/s12862-019-1491-3. 1471-2148. 6685191. 31387545 . free .

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