Amplectobeluidae

Amplectobeluidae
Scientific classification
Kingdom:Animalia
Clade:Euarthropoda
Class:†Dinocaridida
Order:†Radiodonta
Clade:†Amplectobeluidae

Amplectobeluidae is a clade of Cambrian anomalocaridans.

Definition

In 2014, Amplectobeluidae was defined as the most inclusive clade including Amplectobelua symbrachiata but not Anomalocaris canadensis, Tamisiocaris borealis, or Hurdia victoria.[1]

Classification

Early in 2014, "Anomalocaris" kunmingensis was tentatively assigned to Amplectobelua by Vinther et al.[1] Later that year, however, the discoverers of Lyrarapax unguispinus ignored that assessment and created a genus within Amplectobelua sensu Vinther et al.[2]

Phylogeny

An a posteriori-weighted phylogenetic analysis in 2014 found the following relationships within the Amplectobeluidae:[2]

 

 

NIGP 154565

 
 

"Anomalocaris" saron

 
 
 

 

"Anomalocaris" kunmingensis

 
 

 

Lyrarapax unguispinus

 
 

 

Amplectobelua symbrachiata

 
 

Amplectobelua stephenensis

 
 
 
 

Description

Amplectobeluids had robust, pincer-like frontal appendages, which made them better suited for hunting large, heavily armored prey like trilobites than were most other radiodonts.[1][3] A distinctive physical feature only known in amplectobeluids is a pair of long caudal furcae.[4]

References

  1. 1 2 3 Vinther, Jakob; Stein, Martin; Longrich, Nicholas R.; Harper, David A. T. (2014). "A suspension-feeding anomalocarid from the Early Cambrian". Nature. 507: 496–499. doi:10.1038/nature13010. PMID 24670770.
  2. 1 2 Cong, Peiyun; Ma, Xiaoya; Hou, Xianguang; Edgecombe, Gregory D.; Strausfeld, Nicholas J. (2014). "Brain structure resolves the segmental affinity of anomalocaridid appendages". Nature. 513 (7519): 538–42. doi:10.1038/nature13486. PMID 25043032.
  3. ↑ Daley, Allison C.; Paterson, John R.; Edgecombe, Gregory D.; García-Bellido, Diego C.; Jago, James B. (2013). "New anatomical information on Anomalocaris from the Cambrian Emu Bay Shale and a reassessment of its inferred predatory habits". Palaeontology. 56 (5): 971–990. doi:10.1111/pala.12029.
  4. ↑ Chen, Jun-Yuan; Ramsköld, Lars; Zhou, Gui-Qing (1994). "Evidence for monophyly and arthropod affinity for Cambrian giant predators". Science. 264 (5163): 1304–1308. doi:10.1126/science.264.5163.1304. PMID 17780848.
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