Feeding Mechanism, Feeding Behaviour and Functional Morphology ofOphryoxus gracilis G. O. Sars (Macrothricidae, Cladocera)

SynopsisStructural features related to habits of life are described for the thermosbænaceanMonodella argentarii.Although it can swim, this minute malacostracan is essentially benthic in habits, and its food consists of bottom detritus. The collection and subsequent manipulation of food are described.Monodellais not a filter feeder and no currents are involved in the feeding process which consists essentially of scraping, brushing and pushing. Cephalic appendages only are involved. The structure and mode of action of the mouthparts are described and illustrated in detail, and the functional significance of many structural features is explained.No justification is found for placing the Thermosbænacea in a separate division, the Pancarida, and its position within the Peracarida is discussed.The past history and present distribution of the Thermosbænacea are reconsidered.

Download Full-text

Going underwater: multiple origins and functional morphology of piercing-sucking feeding and tracheal system adaptations in water scavenger beetle larvae (Coleoptera: Hydrophiloidea)

Zoological Journal of the Linnean Society ◽

10.1093/zoolinnean/zlaa132 ◽

2020 ◽

Cited By ~ 1

Author(s):

Georgina Rodriguez ◽

Martin Fikáček ◽

Yȗsuke N Minoshima ◽

Miguel Archangelsky ◽

Patricia L M Torres

Keyword(s):

Functional Morphology ◽

Feeding Behaviour ◽

Sem Analysis ◽

Feeding Strategies ◽

Aquatic Habitats ◽

Tracheal System ◽

Multiple Origins ◽

Key Innovation ◽

Evolutionary Aspects ◽

Character Mapping

Abstract Larvae of water scavenger beetles (Coleoptera: Hydrophiloidea) are adapted to a wide variety of aquatic habitats, but little is known about functional and evolutionary aspects of these adaptations. We review the functional morphology and evolution of feeding strategies of larvae of the families Hydrophilidae and Epimetopidae based on a detailed scanning electron microscope (SEM) analysis, analysis of video records of feeding behaviour and observations of living larvae. There are two main types of feeding mechanisms: chewing and piercing-sucking. The character mapping using the latest phylogenetic hypothesis for Hydrophiloidea infers the chewing system as the ancestral condition. The piercing-sucking mechanism evolved at least four times independently: once in Epimetopidae (Epimetopus) and three times in Hydrophilidae (Berosini: Berosus + Hemiosus; Laccobiini: Laccobius group; Hydrobiusini: Hybogralius). The piercing-sucking apparatus allows underwater extra-oral digestion and decreases the dependence of larvae on an aerial environment. A detailed study of the tracheal morphology of the piercing-sucking lineages reveals four independent origins of the apneustic respiratory system, all of them nested within lineages with piercing-sucking mouthparts. We conclude that piercing-sucking mouthparts represent a key innovation, which allows for the subsequent adaptation of the tracheal system, influences the diversification dynamics of the lineages and allows the shift to new adaptive zones.

Download Full-text

XIV.—The Functional Morphology and Feeding Mechanism of the Chydorid CladoceranEurycercus lamellatus(O. F. Müller)

Transactions of the Royal Society of Edinburgh ◽

10.1017/s0080456800012588 ◽

1963 ◽

Vol 65 (14) ◽

pp. 335-381 ◽

Cited By ~ 55

Author(s):

Geoffrey Fryer

Keyword(s):

Functional Morphology ◽

Mode Of Action ◽

Functional Significance ◽

Structural Features ◽

Feeding Mechanism ◽

Deposit Feeding

SynopsisOutstanding structural features related to habits of life in the chydorid cladoceranEurycercus lamellatusare described. Crawling is as important as swimming in this deposit-feeding species. The nature of the food, its collection and subsequent manipulation, are described. Both cephalic and trunk appendages are involved in this process. Their structure and mode of action are described and illustrated in detail. Many hitherto unknown structural features are described and the functional significance of these and other morphological peculiarities is explained.

Download Full-text

Morphology of gastric mills and mandibles of New Guinean parastacid crayfishes, with comparisons with other Astacidea (Decapoda)

Journal of Crustacean Biology ◽

10.1093/jcbiol/ruaa081 ◽

2020 ◽

Vol 40 (6) ◽

pp. 692-703

Author(s):

Tadashi Kawai ◽

Jiří Patoka

Keyword(s):

New Zealand ◽

Coral Reefs ◽

Functional Morphology ◽

Deep Sea ◽

Feeding Behaviour ◽

New Guinea ◽

Marine Species ◽

Morphological Features ◽

Internal Morphology ◽

The Family

Abstract Knowledge of the morphological features of crayfishes native to New Guinea is limited in many cases, the internal morphology, gastric mills, and mandibles of six species of Cherax species (Decapoda: Astacidea: Parastacidae) from this island were described and illustrated. The measurements were compared with those of parastacid crayfish from Madagascar and New Zealand, with Enoplometopoidea from coral reefs, and Nephropidea from deep sea. Characters peculiar to the family Parastacidae were found both in gastric mills and mandibles, and differences between the morphology of mandibles in freshwater and marine species from the infraorder Astacidea were found. Relationships between functional morphology and feeding behaviour were discussed.

Download Full-text

Feeding behaviour and functional morphology of the neck in the long‐snouted aquatic fossil reptile Champsosaurus (Reptilia: Diapsida) in comparison with the modern crocodilian Gavialis gangeticus

Journal of Anatomy ◽

10.1111/joa.13600 ◽

2021 ◽

Author(s):

Ryoko Matsumoto ◽

Shin‐ichi Fujiwara ◽

Susan E. Evans

Keyword(s):

Functional Morphology ◽

Feeding Behaviour ◽

Gavialis Gangeticus

Download Full-text