Chemoreception in four species of water mites (Acari: Hydrachnida): behavioural and morphological evidence

Baker, Gerald T.

doi:10.1007/bf00053308

Cited by 9 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar structures proved to be chemoreceptors are known in other arthropods. Such receptors are always associated with areas of delicate, perforated cuticle with through‐hole pores that allow the molecules to reach the neurites of the sensory cells (Baker, ; Slifer, ; Steinbrecht, ). The number, size, and arrangement of the pores vary greatly in different groups.…”

Section: Discussionmentioning

confidence: 99%

Oligomeric larvae of the pycnogonids revisited

Alexeeva

Богомолова

Tamberg

et al. 2017

Journal of Morphology

View full text Add to dashboard Cite

Organization and ultrastructure of the protonymphon larva were never adequately described, despite it being the common larval type of the enigmatic sea spiders and the only example of oligosegmented life stage among recent chelicerates. We have made a comprehensive examination of the newly hatched free-living protonymphons of Nymphon brevirostre using SEM, TEM, light, and confocal microscopy. Although fairly typical in their broad characters, protonymphon larvae have a number of unique and unexpected traits. Body cavity, already present at this stage, is lined with extracellular matrix and thus is conclusively identified as primary body cavity. Central nervous system includes four postocular neuromeres arranged in three ganglia: supraesophageal, subesophageal, and the first ganglion of the ventral nerve cord. Examination of the sensory organs revealed unusually organized eyes, mechanoreceptors, and chemoreceptors. We have uncovered a mixed sensory-secretory nature of chelar glands and proposed possible modalities of its receptory part. We gave first descriptions of the complex ultrastructure of three secretory organs (spinning glands, slit-like organs, proboscis glands) and hypothesized on their mode of functioning. Comparisons with another oligomeric larva, for example, nauplius, revealed discrepancies in the segmentation of these animals. Although both larvae are externally unsegmented and bear three pairs of homologous appendages, the protonymphon body includes a fourth segment of the prospective walking legs which is absent in nauplius.

show abstract

Section: Discussionmentioning

confidence: 99%

Oligomeric larvae of the pycnogonids revisited

Alexeeva

Богомолова

Tamberg

et al. 2017

Journal of Morphology

View full text Add to dashboard Cite

show abstract

“…It is composed of a sclerotised capsule (capitulum or infracapitulum or subcapitulum) and two pairs of appendages (pedipalps and chelicerae). They have a raptorial-sensorial function bearing sensory structures able to perceive stimuli of a chemical-tactile nature and thus are involved in detection and capturing of prey (Baker, 1996). In specialised genera (e.g.…”

Section: Taxonomy and Originmentioning

confidence: 99%

The biology and ecology of lotic water mites (Hydrachnidia)

Gerecke²,

2000

View full text Add to dashboard Cite

1. The Hydrachnidia (water mites, Hydracarina) are the most diversified group of the Acari in freshwaters and are abundant and speciose in lotic habitats. Lower-order streams may contain up to 50 species (including benthic and hyporheic forms) and small springs up to 20 crenobiont species. 2. Water mites are grouped into 8 superfamilies, 50 families, 300 genera containing more than 5 000 species. Representatives of all superfamilies (about 3 000 species worldwide) occur in lotic ecosystems, although most lotic species belong to the Hydryphantoidea, Lebertioidea and Hygrobatoidea. Identification of water mite families, genera and subgenera, throughout the world, is possible using taxonomic publications. Keys to species level are also available but mainly for local faunas. Descriptions of larvae and deutonymphs are rare. 3. The life cycle of the Hydrachnidia is unique among the Acari and is similar to that of holometabolous insects, with a heteromorphic parasitic/phoretic larva and two pupa-like resting stages. The larva parasitises mainly insect hosts with apparently no strict hostspecificity. Deutonymphs and adults are voracious predators feeding mainly on insect eggs, insect larvae and microcrustaceans. In some cases, water mite parasitism and predation may substantially affect the structure of lotic communities. 4. Most species show a high degree of habitat/microhabitat specialization. Temperature, current-speed, substratum type, physiographic and geomorphological factors are the major determinants of species composition in water mite communities. 5. The complex, fully aquatic, life cycle and multilevel biocoenotic interactions make water mites well suited for the detection of physical and chemical disturbances to lotic ecosystems. 6. Future research should address the distribution, biology, autecology, community dynamics and ecological interactions of lotic water mites.

show abstract

“…Setae are mechano‐ or chemoreceptors (Baker, ) and are of importance for inter‐ and intraspecific communication (Heethoff et al, ). During the development, the number of setae increases (Seniczak and Seniczak, ).…”

Section: Discussionmentioning

confidence: 99%

Development of the synganglion and morphology of the adult nervous system in the mite Archegozetes longisetosus Aoki (Chelicerata, Actinotrichida, Oribatida)

Hartmann

Laumann

Bergmann

et al. 2016

Journal of Morphology

View full text Add to dashboard Cite

Small arthropods show a highly condensed central nervous system, which is accompanied by the loss of the ancestral metameric organization. This results in the formation of one solid mass, a synganglion. Although numerous studies investigated the morphology of Archegozetes longisetosus, the organization of the nervous system is to date unknown. Using synchrotron X-ray microtomography, we investigated the organization of the nervous system in the adult stage and the development of the synganglion over all five free-living life stages (larva, proto-, deuto-, tritonymph and adult). The general morphology of the synganglion resembles that of other studied mites (in the classic sense) and ticks, being subdivided into a sub- and supraesophageal region, and consisting of cortex and neuropil. All nerves entering the walking legs except the first consist of two rami. This split is not based on a functional division into a motor and a sensory ramus, but both rami contain motor and sensory neurites. Within the synganglion, we found structures that resemble the ancestral metameric organization of the nervous system of arthropods. The development of the synganglion of A. longisetosus shows a more or less linear increase in volume, but cortex and neuropil grow at different rates over the five life stages. Between the second and third nymphal stage, the volume of the neuropil increases at a faster rate than the cortex.

show abstract

Chemoreception in four species of water mites (Acari: Hydrachnida): behavioural and morphological evidence

Cited by 9 publications

References 37 publications

Oligomeric larvae of the pycnogonids revisited

Oligomeric larvae of the pycnogonids revisited

The biology and ecology of lotic water mites (Hydrachnidia)

Development of the synganglion and morphology of the adult nervous system in the mite Archegozetes longisetosus Aoki (Chelicerata, Actinotrichida, Oribatida)

Contact Info

Product

Resources

About