Morphology and paleoecology of the oldest lobster-like decapod, Palaeopalaemon newberryi Whitfield, 1880 (Decapoda: Malacostraca)

Jones, Wade T.; Feldmann, Rodney M.; Hannibal, Joseph T.; Schweitzer, Carrie E.; Garland, Marcus C; Maguire, Evin P.; Tashman, Jessica N.

doi:10.1093/jcbiol/ruy022

Cited by 12 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to eurypterids, pectinate appendages have evolved convergently various times across several arthropod lineages, such as in numerous eumalacostracan taxa and mantid insects (Jones et al, 2018). Furthermore, pectinate claws have evolved independently multiple times in crustaceans but differ functionally from the sweep-feeding eurypterids in that they were able to change mesh size by varying the angle in which they held the free ramus of the claw (Tshudy and Sorhannus, 2000).…”

Section: Methodsmentioning

confidence: 99%

“…However, two Late Devonian fossil decapod crustaceans bore pectinate appendages in which the spines protruded ventrally in a manner similar to the Stylonurina, and were included in this study for comparison. Maxilliped III of Palaeopaleomon newberryi (Figure 2) and maxilliped I of Angustidontus seriatus (Figure 3) were enlarged, highly spinose appendages which were capable of moving dorsal-ventrally (Jones et al, 2018). While…”

Section: Methodsmentioning

confidence: 99%

“…Angustidontus is considered a pelagic predator (Rolfe and Dzik, 2006), Palaeopaleomon is believed to have raked the sediment for infaunal prey (Jones et al, 2018) like the stylonurine eurypterids.…”

Section: Methodsmentioning

confidence: 99%

“…Palaeopaleomon measurements were taken from specimens USNM 617308b, USNM 618374, and CMNH 4106 figured in Jones et al (2018). The mesh sizes and estimated prey sizes of the anomalocarids Tamisiocaris borealis and Pahvantia hastata were compiled from Vinther et al (2014) and Lerosey-Aubril and Pates (2018), respectively.…”

Section: Methodsmentioning

confidence: 99%

“…(Left) Reconstructions of the sweep-feeding decapod Palaeopaleomon newberryi (fromJones et al, 2018).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Discerning the Diets of Sweep-Feeding Eurypterids Through Analyses of Mesh-Modified Appendage Armature

Hughes¹

View full text Add to dashboard Cite

Eurypterids were a group of aquatic chelicerates that lived throughout most of the Paleozoic. While swimming eurypterids are generally considered to be active predators, the benthic stylonurine eurypterids appear to have had a mode of life similar to modern horseshoe crabs with the exception of two clades, the Stylonuroidea and the Mycteropoidea, both of which independently evolved modifications for sweep-feeding on their anterior appendages. Among extant suspension feeders, it has been shown that there is a linear correlation between the average spacing of feeding structures and prey sizes. This relationship was extrapolated to the sweepfeeding stylonuroid and mycteropoid eurypterids in order to estimate the range of prey sizes that they could capture. The majority of eurypterids are found to have armature spacing within a range of 2.5mm to 4.6mm, which corresponds to a prey size range of 3.6mm to 58mm. This suggests that the armature of the sweep-feeding eurypterids was optimally suited for capturing small macrofauna. Benthic macroinvertebrates such as crustaceans, mollusks, and worm-like organisms would have been manageable prey items. The mycteropoid Cyrtoctenus was the most specialized genus of sweep-feeders, and its appendage armature consisted of two rows of flexible filaments extending anteriorly from rachises forming comb-like structures. The rachises were associated with moveable spines on the anterior-ventral sides of the podomeres, which would scrape the filaments and eject trapped food particles into the oral region. Cyrtoctenus had the smallest estimated prey size among eurypterids, and its inter-filament spacing suggests its diet consisted of mesoplankton. The supported this project through the Rodney M. Feldmann grant, and my sincerest gratitude to Dr. Andrew Ross of the National Museum of Scotland and to Mr. Paul Shepherd of the British Geological Survey for facilitating access to specimens. Last but not least, I would like to thank my family for their continued support and encouragement throughout the years. v TABLE OF CONTENTS CHAPTER

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%