Fistuliramus, Astrova, 1960
publication ID |
https://doi.org/ 10.26879/585 |
publication LSID |
lsid:zoobank.org:pub:6F0DE44D-32BD-4882-9C38-FF76446D15EA |
persistent identifier |
https://treatment.plazi.org/id/2F15F14D-FF98-FF92-06D2-AE8AFAC0F8BF |
treatment provided by |
Felipe |
scientific name |
Fistuliramus |
status |
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Genus FISTULIRAMUS Astrova, 1960 View in CoL
Type species. Fistuliramus sinensis Astrova, 1960 View in CoL . Upper Silurian (Ludlowian); Arctic Urals, Russia .
Diagnosis. Branched colonies; secondary overgrowths common. Autozooecia long, subcircular in transverse section of endozone; isolated by vesicular skeleton in exozones. Autozooecial apertures rounded to oval, usually arranged in regularly alternating longitudinal rows; maculae absent or poorly developed. Autozooecial diaphragms present in both in endozones and exozones, usually abundant. Lunaria in outer endozones and exozones, consisting of granular material, well-developed. Vesicles in long blisters in endozones, becoming more subquadrate in the transition region, decreasing in height in outer exozones. Autozooecial walls thin, granular in endozones; with thick laminated lining in exozones.
Remarks. Fistuliramus Astrova, 1960 differs from the similar genus Fistulipora M’Coy, 1849 in having constantly ramose colony form and monticules with a ring of larger autozooecia. Eofistulipora Morozova, 1959 differs from Fistuliramus in absence of vesicular skeleton in endozone and less abundant diaphragms in exozones.
Occurrence. Silurian–Permian; worldwide.
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