Functional Morphology of Eunicidan (Polychaeta) Jaws

Clemo, W. Cyrus; Dorgan, Kelly M.

doi:10.1086/696291

Cited by 8 publications

(18 citation statements)

References 25 publications

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“…These include mollusc radulae, polychaete jaws, mandibles of dragonflies and beetles, and marine arthropods, but all such studies are limited in scope. Some capture a small selection of shape variables taken to have functional significance (Clemo & Dorgan, 2017; Patterson, 1984), while the handful of recent applications of Finite Element Analyses to invertebrate feeding structures (Bicknell et al, 2018; Blanke et al, 2017; Hörnschemeyer et al, 2013; Krings et al, 2020) are focused on small numbers of taxa and individuals because of the computational demands and time‐consuming nature of robust FEA.…”

Section: Introductionmentioning

confidence: 99%

“…This descriptive approach has made it difficult to undertake robust statistical testing of hypotheses, leading to an overreliance on analogy and plausibility when attempting to assess the function of feeding structures in taxa that are extinct or hard to observe feeding. Despite many calls to address this issue across a range of disparate phyla (Bernays, 1991; Blanke et al, 2017; Clemo & Dorgan, 2017; Hickman, 1980; Krings et al, 2020; Padilla, 2004; Patterson, 1984), quantitative analysis has remained largely unexplored (Patterson, 1984; but see Blanke et al, 2017 as a notable exception). The few quantitative analyses of invertebrate feeding structures performed to date offer significant improvements over qualitative classifications of morphology.…”

Section: Introductionmentioning

confidence: 99%

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Dietary inference from dental topographic analysis of feeding tools in diverse animals

et al. 2022

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1. Understanding the relationship between form, function and diet in feeding structures is critical to constraining the roles of organisms in their ecosystem and adaptive responses to food resources. Yet, analysis of this relationship in invertebrates has been hampered by a reliance on descriptive and qualitative characterisation of the shapes of feeding structures. This has led to a lack of robust statistical analyses and overreliance on analogy and plausibility, especially for extinct taxa and animals that are hard to observe feeding.2. Here we test the efficacy of dental topographic metrics in quantification of form in invertebrate mandibles and assess their relationship with diet. Specifically, we analyse the mandibles of 45 species of extant orthopterans. Orthopterans' wellconstrained diets make them an ideal model system for our study.3. We find that topographic metrics applied to Orthoptera successfully recover the same relationship between dietary intractability and dental tool morphology as they do in mammals, and that combination of individual metrics in multivariate analysis most strongly captures this relationship. Furthermore, multivariate topographic metrics calibrated to the food consumed by mammals accurately predict dietary differences between orthopterans (82% taxa correctly assigned). 4. Our results demonstrate that these metrics can be used in quantitative analysis and comparison of non-homologous mouthparts to reliably investigate the relationship between diet, form and function of feeding tools across Bilateria. We anticipate that this will facilitate more rigorous ecological analysis of fossil and historical material, providing new methods to investigate adaptive responses and community-level interactions through time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dietary inference from dental topographic analysis of feeding tools in diverse animals

et al. 2022

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“…The different jaw morphologies also have different biomechanics with implications for food capturing and shredding [33]. In maxillae bearing carriers of at least Lumbrineridae and Onuphidae ( Figure 3B,H), those plates attached to the carriers are primary maxillae (maxillae I, II in both families and unpaired III in Onuphidae) responsible for catching and shredding (exclusive of serrated plates) food items.…”

Section: Introductionmentioning

confidence: 99%

“…The unpaired serrated primary maxillae III in onuphid improves the breaking of food with different properties. The interlocking mechanism, present at the posterior end of maxillae I in both families, prevents slipping of the plates and it is an important mechanism in capturing moving food [33]. Feeding habits and food quality consumed are variable within recent and, probably, extinct Eunicida, including grazing, deposit-feeding, and predation, detritivory, herbivory, carnivory and omnivory [34].…”

Section: Introductionmentioning

confidence: 99%

The Current State of Eunicida (Annelida) Systematics and Biodiversity

et al. 2021

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In this study, we analyze the current state of knowledge on extant Eunicida systematics, morphology, feeding, life history, habitat, ecology, distribution patterns, local diversity and exploitation. Eunicida is an order of Errantia annelids characterized by the presence of ventral mandibles and dorsal maxillae in a ventral muscularized pharynx. The origin of Eunicida dates back to the late Cambrian, and the peaks of jaw morphology diversity and number of families are in the Ordovician. Species richness is heterogeneous among the seven recent families, with more than half of the valid species belonging to the Eunicidae + Onuphidae clade, one of the latest clades to diverge. Eunicidans inhabit soft and hard substrates from intertidal to deep waters in all oceans. The few freshwater species are restricted to Histriobdellidae, a family exclusively commensal/parasite of crustaceans. The reproductive biology, development and ecology of most families are poorly known and the information available suggests low dispersal ability. However, all families have records of widely distributed species. Scrutiny of these wide distributions has often revealed the presence of exotic species or more than one species. The exploration of the deep-sea and of new habitats has led to recent descriptions of new species. Furthermore, the revision of type specimens, the examination of new morphological features and the use of molecular data have revealed hidden biodiversity under unjustified synonyms, poor understanding of morphological features and incomplete descriptions. Molecular studies are still very few or nonexistent for the families Histriobdellidae, Hartmaniellidae, Lumbrineridae and Oenonidae. The integration of new methodologies for morphological and molecular study, along with information on biological and ecological traits appears to be the path to improve the knowledge on the diversity of Eunicida.

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“…( Camargo and Lana 1995 , Clemo and Dorgan 2017 ): Prostomium with four eyes, three antennae and two lips palps (Fig. 3 e ).…”

Section: Checklistsmentioning

confidence: 99%

Marine invertebrates associated with rhodoliths/maërl beds from northeast Brazil (State of Paraíba)

Costa¹,

Dolbeth²,

Prata³

et al. 2021

BDJ

483

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This study investigates the marine macroinvertebrate fauna of rhodolith beds (non-geniculated red corallinaceaous algae) in northeast Brazilian. A total of 57 species were identified, belonging to six phyla (Platyhelminthes, Annelida, Sipuncula, Mollusca, Arthropoda and Echinodermata), of which 50 are considered here as new records for the Paraíba State. Annelids (Class Polychaeta) were the most representative taxa in Miramar and Seixas Beaches, while molluscs were dominant in Maceió Beach. This is the first study that includes an identification key, diagnostic features and distribution patterns worldwide and local (including new records) of the marine invertebrate fauna associated with rhodolith beds in northeast Brazil (State of Paraíba). Sampling events were performed in 2018, at low tide in the intertidal to shallow subtidal zones (1.5 and 4.0 m depth), in Miramar, Seixas and Maceió Beaches. A total of 17 species were found for the first time on Seixas Beach, as well as all identified species for Miramar and Maceió. This study tries to contribute to the knowledge of marine invertebrates in northeast Brazilian shallow habitats, providing a baseline for future environmental studies.

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Functional Morphology of Eunicidan (Polychaeta) Jaws

Cited by 8 publications

References 25 publications

Dietary inference from dental topographic analysis of feeding tools in diverse animals

Dietary inference from dental topographic analysis of feeding tools in diverse animals

The Current State of Eunicida (Annelida) Systematics and Biodiversity

Marine invertebrates associated with rhodoliths/maërl beds from northeast Brazil (State of Paraíba)

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