Cisnerospira Manceñido, 2004

Macfarlan, Donald Alexander Bankier, 2023, Latest Triassic and Early Jurassic Spiriferinida (Brachiopoda) of Zealandia (New Zealand and New Caledonia), Zootaxa 5277 (1), pp. 1-58 : 14-15

Cisnerospira Manceñido, 2004

2004 Cisnerospira Manceñido p. 272.

2007 Cisnerospira Manceñido, 2004 ; Williams et al. p. xlix.

2016 Cisnerospira Manceñido, 2004 ; Baeza-Carratalá et al. p. 1084.

Type species. Spiriferina adscendens Deslongchamps 1858 ( OD) .

Cisnerospira was proposed by Manceñido (2004) and described in more detail by Baeza-Carratalá et al. (2016), who placed it in the subfamily Paralaballidae and reviewed its distribution in detail. The genus is characterised by a well-developed subpyramidal ventral valve and smooth, non-costate valves. The ventral valve is much higher than the dorsal. The subpyramidal ventral valve and high ventral umbo allow separation from the other non-costate Jurassic spiriferinide, Liospiriferina .

The type species was originally described from Normandy in France ( Deslongchamps 1858). Baeza-Carratalá et al. (2016) include twelve species in the genus, eight of them tentatively. The genus is present in the Pliensbachian and Toarcian of France ( Alméras and Fauré 2000), Portugal ( Comas-Rengifo et al. 2015, da Rocha et al. 2016), Spain ( Alméras & Fauré 2000, Baeza-Carratalá et al. 2011), Austria (V̂r̂s et al. 2003, Siblík 2009), Hungary ( Dulai 1992, 2003, V̂r̂s 2009), Slovakia ( Siblík 1967), Turkey (V̂r̂s & Kandemir 2011). World distribution is shown in Fig. 6 .

Figures

FIGURE 6. World distribution of spiriferinide genera. Data from Fossilworks (downloaded 2 April 2020) and relevant literature. Base maps from Alroy (2013). Online paleogeographic map generator. http://paleodb.org/?a=mapForm Maps drawn on equirectangular projection for 185 ma, focal co-ordinates -80°, 180°. New Zealand and New Caledonia in the Jurassic were a series of terranes on the subducted margin of Gondwana, and the positions shown on this map are approximate.