Article (Scientific journals)
Predatory boreholes in Tournaisian (Lower Carboniferous) spiriferid brachiopods
Mottequin, Bernard; Sevastopulo, George
2009In Lethaia, 42, p. 274-282
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Keywords :
Belgium; borehole; brachiopods; predation; Tournaisian
Abstract :
[en] A brachiopod fauna from the uppermost part of the Tournaisian Tournai Formation (Belgium) contains an undetermined species of Crurithyris (Spiriferida, Ambocoeliidae), which displays numerous bored shells. About 8% of the 432 specimens with conjoined valves display single, small (≤ 1 mm) boreholes, which are smooth-sided, cylindrical or weakly conical, circular to slightly elliptical in plan view, perpendicular to the shell surface and generally complete. Of the 35 bored articulated specimens, 27 were drilled on the ventral valve. Most of the boreholes are located in the posterior half of the shell, and no case of edge-drilling has been observed. The boreholes were drilled by a predator, or possibly a parasite, which selected individuals greater than 2.5 mm long. Crurithyris sp. may have represented an attractive (in terms of energy cost) and easy target for a small-sized predator because of its thin shell and ornament of minute spines.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Mottequin, Bernard ;  Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine
Sevastopulo, George
Language :
English
Title :
Predatory boreholes in Tournaisian (Lower Carboniferous) spiriferid brachiopods
Publication date :
2009
Journal title :
Lethaia
ISSN :
0024-1164
eISSN :
1502-3931
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
42
Pages :
274-282
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 December 2008

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