In the post-Paleozoic communities, brachiopods are generally thought to be less attractive prey to predators than bivalves. However, recent studies have documented significant predation pressure on brachiopods throughout the Mesozoic and Cenozoic. The present study is aimed to document predation pressure on the Maastrichtian Rectithyris subdepressa from the Kallankurichchi Formation of the Cauvery Basin, India. While drilling intensity is a direct measure, repair scar frequency measures failed, non-lethal attacks. A drilling intensity of 7% and repair scar intensity of 4% is observed in the present study. These results, along with the stereotype of predatory behavior, such as the preference of size and location of the attack, indicate that both drilling and durophagous predators preyed upon Rectithyris subdepressa and the attacks are not accidental by nature. Although both predatory drill holes and repair scars could be successfully identified, specific groups could not be identified as the predators responsible for these attacks. While previous studies suggested a comparatively lower predation pressure on brachiopods than sympatric bivalves, brachiopods are the only drilled taxa in the Kallankurichchi Formation. While bivalves are the most abundant component, the large size and thicker shell of the epifaunal bivalves may explain the absence of drilling predation on the bivalves.

在后古生代群落中，腕足类动物通常被认为对捕食者的吸引力不如双壳类动物。然而，最近的研究记录了整个中生代和新生代腕足动物受到的巨大捕食压力。本研究旨在记录印度 Cauvery 盆地 Kallankurichchi 组对Maastrichtian Rectithyris subdepressa的捕食压力。而钻孔强度是直接测量，修复疤痕频率测量失败，非致命攻击。在本研究中观察到 7% 的钻孔强度和 4% 的修复疤痕强度。这些结果，连同捕食行为的刻板印象，例如对攻击的大小和位置的偏好，表明钻探和硬食性捕食者都捕食Rectithyris subdepressa和攻击本质上不是偶然的。尽管可以成功识别掠夺性钻孔和修复疤痕，但无法确定特定群体是负责这些攻击的掠食者。虽然之前的研究表明腕足类动物的捕食压力比同域双壳类动物的捕食压力低，但腕足类动物是 Kallankurichchi 组中唯一钻探的分类群。虽然双壳类是最丰富的成分，但表层动物双壳类的大尺寸和较厚的壳可以解释双壳类没有钻捕。