Amplectobeluidae

Amplectobeluidae
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Dinocaridida
Order:	†Radiodonta
Clade:	†Amplectobeluidae; Pates et al., 2019

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]

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References

Vinther, Jakob; Stein, Martin; Longrich, Nicholas R.; Harper, David A. T. (2014). "A suspension-feeding anomalocarid from the Early Cambrian" (PDF). Nature. 507 (7493): 496–499. doi:10.1038/nature13010. PMID 24670770.
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.
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.
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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[vinther2014-1] Vinther, Jakob; Stein, Martin; Longrich, Nicholas R.; Harper, David A. T. (2014). "A suspension-feeding anomalocarid from the Early Cambrian" (PDF). Nature. 507 (7493): 496–499. doi:10.1038/nature13010. PMID 24670770.

[cong2014-2] 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.

[daley2013-3] 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.

[chen1994-4] 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.