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Journal article
The feeding system of Tiktaalik roseae : an intermediate between suction feeding and biting
Proceedings of the National Academy of Sciences - PNAS, v 118(7)
16 Feb 2021
PMID: 33526593
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Changes to feeding structures are a fundamental component of the vertebrate transition from water to land. Classically, this event has been characterized as a shift from an aquatic, suction-based mode of prey capture involving cranial kinesis to a biting-based feeding system utilizing a rigid skull capable of capturing prey on land. Here we show that a key intermediate,
, was capable of cranial kinesis despite significant restructuring of the skull to facilitate biting and snapping. Lateral sliding joints between the cheek and dermal skull roof, as well as independent mobility between the hyomandibula and palatoquadrate, enable the suspensorium of
to expand laterally in a manner similar to modern alligator gars and polypterids. This movement can expand the spiracular and opercular cavities during feeding and respiration, which would direct fluid through the feeding apparatus. Detailed analysis of the sutural morphology of
suggests that the ability to laterally expand the cheek and palate was maintained during the fish-to-tetrapod transition, implying that limited cranial kinesis was plesiomorphic to the earliest limbed vertebrates. Furthermore, recent kinematic studies of feeding in gars demonstrate that prey capture with lateral snapping can synergistically combine both biting and suction, rather than trading off one for the other. A "gar-like" stage in early tetrapod evolution might have been an important intermediate step in the evolution of terrestrial feeding systems by maintaining suction-generation capabilities while simultaneously elaborating a mechanism for biting-based prey capture.
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Details
- Title
- The feeding system of Tiktaalik roseae : an intermediate between suction feeding and biting
- Creators
- Justin B Lemberg - University of ChicagoEdward B Daeschler - Drexel UniversityNeil H Shubin - University of Chicago
- Publication Details
- Proceedings of the National Academy of Sciences - PNAS, v 118(7)
- Publisher
- PNAS
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:000621748600028
- Scopus ID
- 2-s2.0-85100967035
- Other Identifier
- 991019168419904721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Zoology