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GEOREF RECORD

A note on the mode of attachment and growth of the coral Metriophyllum gracile Schlueter

F. J. W. Holwill
A note on the mode of attachment and growth of the coral Metriophyllum gracile Schlueter
Geological Magazine (1963) 100 (6): 503-506

Abstract

Several specimens of Metriophyllum gracile collected from a locality in the type area (middle Devonian) in the Eifel region, Germany, show a distinct groove extending from the apical end about one-third the length of the corallum. It is suggested that the groove formed with the growth of the coral as a result of being anchored to a stem such as a seaweed which decomposed leaving no trace. Specimens from other localities in the same area and at the same horizon show either a bulbous expansion or a rootlike process for attachment. Also noted is a change in form from trochoid to nearly cylindrical where the corallum attains maximum diameter, and a shift from the longitudinal ridges at the apical end to more prominent growth striations at the distal end, with a constriction at the junction. No change in relative rate of growth could be detected, but there seems to have been a pause at the point of maturity.


ISSN: 0016-7568
EISSN: 1469-5081
Coden: GEMGA4
Serial Title: Geological Magazine
Serial Volume: 100
Serial Issue: 6
Title: A note on the mode of attachment and growth of the coral Metriophyllum gracile Schlueter
Author(s): Holwill, F. J. W.
Pages: 503-506
Published: 1963
Text Language: English
Publisher: Cambridge University Press, London, United Kingdom
Accession Number: 1964-002239
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N47°15'00" - N55°00'00", E05°49'60" - E15°00'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1964
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