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Melitasphaeridium
Harland & Hill, 1979 |
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| Type species : | M. choanophorum |
| Synopsis : | Cysts skolochorate, body subspherical, bearing 19 to 25, hollow, intratabular processes with strongly aculeate or slightly expanded distally to funnel-shaped tips with smooth or denticulate to aculeate margins ; paratabulation ganyaulacacean, indicated by processes ; archeopyle precingular, type P, operculum free. |
| Shape : | Skolochorate, body subspherical. |
| Wall relationships : | Endophragm and periphragm appressed between processes. |
| Wall features : | No parasutural features. Processes intratabular, tubular and narrow relative to cyst size ; tips of processes slightly expanded to funnel-shaped distally and with entire, denticulate, setate or aculeate margins. Periphragm smooth or faintly ornamented. |
| Paratabulation : | Expressed by
intratabular processes ; gonyaulacacean. Process formula : 0-1pr, 4', 6", 0-6c, 6'", 1p, 1 "". |
| Archeopyle : | Precingular, type P(3") ; operculum free. |
| Paracingulum : | Indicated by six processes or by the absence of processes. |
| Parasulcus : | Not indicated. |
| Size : | 55 µm to 75 µm, overall diameter. |
| Comparison : | Melitasphaeridium
differs from Kleithriasphaeridium and Cordosphaeridium in having
proccesses whose distal tips are modified into funnel-like structures. Melitasphaeridium fibrous wall as in Cordosphaeridium. |
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| List of species : |
| M. augustum M. asterium M. choanophorum var. choanophorum M. choanophorum var. reductum M. pseudorecurvatum M. ? simpulum M. ? variabile |
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