ORDOVICIAN AND SILURIAN HYOLITHS AND GASTROPODS REASSIGNED FROM THE HYOLITHA FROM THE GIRVAN DISTRICT, SCOTLAND

Re-examination of type material of the hyolithids Hyolithes ardmillanensis Reed, 1909 from the lower Caradoc and H. candidus Reed, 1909 from the lower Ashgill suggests that these species are representatives of the genus Leolites Marek, 1967 to which they are referred with question. Hyolithes subcris...

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Bibliographic Details
Published in:Journal of paleontology 2003-07, Vol.77 (4), p.625-645
Main Author: MALINKY, JOHN M
Format: Article
Language:English
Subjects:
Ashgillian
Ayrshire Scotland
Biodiversity
Caradocian
classification
Europe
Fauna
fossilization
Fossils
Gastropoda
Genera
Geology
Girvan Scotland
Girvanolithes
Girvanolithes thraivensis
Great Britain
Hyolithes
Hyolithes ardmillanensis
Hyolithes candidus
Hyolithes subcrispatus
Hyolithes sylvestris
intestines
Invertebrata
invertebrate
Lectotypes
Leolites
Mollusca
morphology
new taxa
Ordovician
Organisms
Paleontology
Paleozoic
Paralectotypes
Recilites
revision
Scotland
Silurian
Snails
Strathclyde region Scotland
Stratigraphy
taxonomy
type specimens
United Kingdom
Upper Ordovician
Western Europe
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Summary:Re-examination of type material of the hyolithids Hyolithes ardmillanensis Reed, 1909 from the lower Caradoc and H. candidus Reed, 1909 from the lower Ashgill suggests that these species are representatives of the genus Leolites Marek, 1967 to which they are referred with question. Hyolithes subcrispatus Reed, 1909 from the upper Ashgill, and H. sylvestris Reed, 1909 from the lower Llandovery are referred tentatively to Recilites Marek, 1967. These are the first occurrences of these genera outside of Bohemia, and the stratigraphic range of Recilites is extended considerably if H. sylvestris is in fact a representative of that genus. The orthothecid Hyolithes (Orthotheca) thraivensis Reed, 1909 from the upper Ashgill is now referred to the new genus Girvanolithes, to which the Caradocian H. (O.) subexcavatus Reed, 1909 is assigned with question. Girvanolithes thraivensis is exceptional because it is one of a small number of orthothecid species for which intestinal remains are known; equally remarkable is the fact that three such specimens were found, and these are the only hyolith intestines ever reported from Britain. The hyolithid species H. asteroideus Reed, 1909, H. columbanus Reed, 1909, H. girvanensis Reed, 1909, H. immemor Reed, 1909, H. multipunctatus Reed, 1909 and H. penkillensis Reed, 1909, and the orthothecid Hyolithes (Orthotheca) subornatus Reed, 1909 are here deemed unrecognizable owing to incomplete preservation. Ceratotheca? subuncata is reassigned to the gastropod genus Ecculiomphalus Portlock, 1843 with question.
ISSN:0022-3360
1937-2337
DOI:10.1666/0022-3360(2003)077<0625:OASHAG>2.0.CO;2