Nucleospira sp.

Sun, Yuanlin & Baliński, Andrzej, 2011, Silicified Mississippian brachiopods from Muhua, southern China: Rhynchonellides, athyridides, spiriferides, spiriferinides, and terebratulides, Acta Palaeontologica Polonica 56 (4), pp. 793-842 : 817

publication ID	https://doi.org/ 10.4202/app.2010.0106
persistent identifier	https://treatment.plazi.org/id/03BB9544-FFB6-A664-FF2A-FDE998C6FBD4
treatment provided by	Felipe
scientific name	Nucleospira sp.
status

Treatment

Nucleospira sp.

Fig. 19C–E View Fig .

1999 Nucleospira ? sp.; Baliński 1999: 445, fig. 4H.

Material.—Four fragmentary dorsal valves and 2 shell fragments from samples MH 1 and Mu−42.

Remarks.—The species was first noted in the Muhua fauna by Baliński (1999) on the basis of two small fragments of dorsal valves extracted by acid treatment from a 1.5 kg sample from Mu−42. Recently, although several hundreds of kilograms of samples from the Muhua Formation were processed in acid, only three additional fragmentary specimens were found. The specimens show the characteristic postero−ventrally projecting cardinal process, with a wide cavity at its internal base. The sockets are shallow, positioned behind the flanks of the cardinal process and crural bases ( Fig. 19D, E View Fig ); the latter run ventrally along the flanks of the cardinal process. Spine bases are clearly seen on only one dorsal valve.