. Bulletin of the British Museum (Natural History). Fig. 134 Semimulticavea marginata (Canu & Bassler), BM(NH) D55371, part of a fractured colony showing four spine-like ?pseudolunaria covered by the next layer of colony growth, x 103; see also Fig. 132. intermediate type which are flexed aborally at their contacts with the zooecial walls. Zooecial chambers near the centres of the subcoionies may be seen to continue into overlying subcolonies (Fig. 136B). The distinction between autozooecia and kenozooecia is not readily made in thin section. Measurements. TAM, 0-10-0-15 mm; KAM,
. Bulletin of the British Museum (Natural History). Fig. 134 Semimulticavea marginata (Canu & Bassler), BM(NH) D55371, part of a fractured colony showing four spine-like ?pseudolunaria covered by the next layer of colony growth, x 103; see also Fig. 132. intermediate type which are flexed aborally at their contacts with the zooecial walls. Zooecial chambers near the centres of the subcoionies may be seen to continue into overlying subcolonies (Fig. 136B). The distinction between autozooecia and kenozooecia is not readily made in thin section. Measurements. TAM, 0-10-0-15 mm; KAM, 0-04^-05 mm. Remarks. Specimens of this species from Faringdon have usually been referred to as Radiopora neocomiensis d'Orbigny. However, there are complex systematic problems resulting from the use of this name. Firstly, Radiopora d'Orbigny, 1849 is an inappropriate genus for the Faringdon species. The type species, by original designation, is Ceriopora formosa Michelin from the Cenomanian of Le Mans, which has a ramose colony-form with stellate subcolonies. D'Orbigny (1854: 992-998) attri- buted 10 species to Radiopora, including Radiopora formosa (Michelin) from the type locality of Le Mans. D'Orbigny's illustrations of R. formosa are reproduced or redrawn from Michelin's original figures; the dendroid branches are almost certainly not multilayered and therefore unlike so-called Radiopora from the Faringdon Sponge Gravel. The species neocomiensis was originally described in the binomen Monticulipora neocomiensis d'Orbigny (1850: 95) and characterized thus: 'Espece tubereuse, a monticules tres reguliers. Fontenoy, Chenay'. D'Orbigny later (1854: 993- 994), placed his species in synonymy with Alveolites heteropora Roemer, 1836 [sic\, as Radiopora heteropora d'Orb. 1852 [.9/c], and figured (1854: pi. 781, figs 13-16) a massive multi- layered colony with monticules and radiating rows of auto- zooecial apertures. The species heteropora had been first described by Roemer (1839,
Size: 1473px × 1696px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
