Intense drilling in the Carboniferous brachiopod Cardiarina cordata Cooper, 1956
Authors: HOFFMEISTER, ALAN P.; KOWALEWSKI, MICHAŁ; BAMBACH, RICHARD K.; BAUMILLER, TOMASZ K.
Source: Lethaia, Volume 36, Number 2, 2003 , pp. 107-117(11)
Publisher: Taylor and Francis Ltd
Abstract:The brachiopod Cardiarina cordata, collected from a Late Pennsylvanian (Virgilian) limestone unit in Grapevine Canyon (Sacramento Mts., New Mexico), reveals frequent drillings: 32.7% (n = 400) of these small, invariably articulated specimens (<2 mm size) display small (<0.2 mm), round often beveled holes that are typically single and penetrate one valve of an articulated shell. The observed drilling frequency is comparable with frequencies observed in the Late Mesozoic and Cenozoic. The drilling organism displayed high valve and site selectivity, although the exact nature of the biotic interaction recorded by drill holes (parasitism vs. predation) cannot be established. In addition, prey/host size may have been an important factor in the selection of prey/host taxa by the predator/parasite. These results suggest that drilling interactions occasionally occurred at high (Cenozoic-like) frequencies in the Paleozoic. However, such anomalously high frequencies may have been restricted to small prey/host with small drill holes. Small drillings in C. cordata, and other Paleozoic brachiopods, may record a different guild of predators/parasites than the larger, but less common, drill holes previously documented for Paleozoic brachiopods, echinoderms, and mollusks.
Document Type: Research Article
Publication date: 2003-01-01
- This journal is now published by Blackwell Publishing. Current issues of this journal are available from here. Backfile content is in the process of being reloaded by Blackwell, and will shortly be removed from this page and available only from the Blackwell link above. If you have any queries about continued access to this journal please contact firstname.lastname@example.org
- Editorial Board
- Information for Authors
- Subscribe to this Title
- ingentaconnect is not responsible for the content or availability of external websites