Shell repair following failed predation in two Upper Ordovician brachiopods from central Sweden

Citation
Jor. Ebbestad et Aes. Hogstrom, Shell repair following failed predation in two Upper Ordovician brachiopods from central Sweden, GFF, 122, 2000, pp. 307-312
Citations number
37
Categorie Soggetti
Earth Sciences
Journal title
GFF
ISSN journal
11035897 → ACNP
Volume
122
Year of publication
2000
Part
3
Pages
307 - 312
Database
ISI
SICI code
1103-5897(200009)122:<307:SRFFPI>2.0.ZU;2-S
Abstract
Shell repair is reported in two dorsal valves of the brachiopod Strophomena ? arachnoidea Lindstrom, 1880 from the lower Ashgill Fjacka Formation of th e Siljan district, Dalarna. The most severe case displays a large wedge-sha ped injury that cuts back about half the length of the animal. Substantial damage to the growing edge of the mantle resulted in malformation of the re paired area. The outline of the injury on the second specimen is also wedge -shaped, but of much less extent and with little disturbance of the subsequ ent growth pattern. Both injuries are interpreted as resulting from failed predation, with cephalopods being the most likely aggressors.