Kutorginata

Kutorginata; Temporal range: Cambrian Series 2– Miaolingian (Atdabanian–Amgaian) PreꞒ Ꞓ O S D C P T J K Pg N
	K. cingulata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	†Kutorginata
Order:	†Kutorginida
Genera
	Kutorgina ; Nisusia ; (incomplete list)

Kutoringates are early rhynchonelliform brachiopods.

Their annulated pedicles emerge from the apex of their pedicle valve, but they also have a large opening between the valves (from which the pedicle has, at various times, been alleged to emerge from).^[1]

The pedicles are much larger than the apical opening.^[1]

Included genera

Kutorgina

Kutorgina has a concavo-convex shell with the smaller brachial valve dished in and the larger pedical valve broadly arched. The brachial valve has a rather prominent interarea at the back which is curved over by the prominent beak at the back of the pedical valve.

It includes the species Kutorgina elanica Malakhovskaya, 2013 and K. chengjiangensis Zhang et al. 2007.

K. chengjiangensis preserves soft anatomy - pedicle, lophophore & gut.

Nisusia

Nisusia Walcott, 1905 (Walcott, 1889) is known from the Middle Cambrian (~508 million years ago) Burgess Shale. Template:Gpb abundance

It's a senior synonym to Orthisina alberta Walcott, 1889.

ITS pedicle emerges from between its valves, as displayed by silicified material of N. sulcate, though it still has an opening at the apex of the pedicle valve.^[1]

External links

Template:Burgess Shale species

References

^ ^a ^b ^c ^d Holmer, Lars E; Zhang, Zhifei; Topper, Timothy P; Popov, Leonid; Claybourn, Thomas M (2017). "The attachment strategies of Cambrian kutorginate brachiopods: The curious case of two pedicle openings and their phylogenetic significance". Journal of Paleontology. 92: 33–39. doi:10.1017/jpa.2017.76.

Kutorginata
Moore, Lalicker, and Fischer. Invertebrate Fossils, ch 6 Brachiopoda. McGraw-Hill 1952.

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[Holmer2017-1] Holmer, Lars E; Zhang, Zhifei; Topper, Timothy P; Popov, Leonid; Claybourn, Thomas M (2017). "The attachment strategies of Cambrian kutorginate brachiopods: The curious case of two pedicle openings and their phylogenetic significance". Journal of Paleontology. 92: 33–39. doi:10.1017/jpa.2017.76.

[1]