. Bulletin of the British Museum (Natural History), Geology. SYSTEMATICS OF MELICERITITID CYCLOSTOME BRYOZOANS 47. Figs 121-123 Semielea spp., photographs. 121-122, S. vieilbanci (d'Orbigny, 1850), MNHN d'Orbigny Collection 8200, Senonian, ?Villedieu, ?Vendome, syntype of Diastopora arborescens d'Orbigny, 1851; 121, profile of colony with intact base; 3-2; 122, underside of base showing entrances to the axial lumens of four branches, x 4-1. 123, S, dichotoma (d'Orbigny, 1853), MNHN d'Orbigny Collection 8194, lectotype, Senonian [?Coniacian], Tours, Indre et Loire, France, x 3-7. from the Cenom
. Bulletin of the British Museum (Natural History), Geology. SYSTEMATICS OF MELICERITITID CYCLOSTOME BRYOZOANS 47. Figs 121-123 Semielea spp., photographs. 121-122, S. vieilbanci (d'Orbigny, 1850), MNHN d'Orbigny Collection 8200, Senonian, ?Villedieu, ?Vendome, syntype of Diastopora arborescens d'Orbigny, 1851; 121, profile of colony with intact base; 3-2; 122, underside of base showing entrances to the axial lumens of four branches, x 4-1. 123, S, dichotoma (d'Orbigny, 1853), MNHN d'Orbigny Collection 8194, lectotype, Senonian [?Coniacian], Tours, Indre et Loire, France, x 3-7. from the Cenomanian than from any other stage (see Fig. 127). Table 4 is a key to species identification and should be used in conjunction with Figures 125 and 126 which depict the outline shapes of autozooidal and eleozooidal apertures. The species of Reptomultelea are fairly easy to separate if the material available is sufficient to access the character states of the autozooids and eleozooids. Variation between the small number of specimens available is relatively large for three of the new species (R. convexa, R. goldfussi and R. mitrus) recognized here. It is possible that one or more of these species will eventually require taxonomic splitting when fur- ther specimens become available. Species of Reptomultelea are generally easily distinguished from the encrusting bases of erect melicerititids because of their large areal extent, typically multilamellar growth, regu- larity and generally high proportion of autozooids relative to eleozooids and kenozooids. Among species founded for non-erect colonies of melicerititids, Reptoceritites rowei Gre- gory, 1899 and Reptoceritites acutissima Voigt, 1963 fail to meet these criteria and are considered to be the encrusting bases of colonies of Meliceritites rather than species of Reptomultelea. A difficult problem concerns the phylogenetic relationships between species of Reptomultelea and species of erect fixed- walled melicerititids belonging p
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