Subphylum Chelicerata, Class Arachnida

Proctor, H. C.; Smith, Ian M.; Cook, David; Smith, Bruce P.

doi:10.1016/b978-0-12-385026-3.00025-5

Cited by 45 publications

(59 citation statements)

References 114 publications

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“…However, several lineages among the Acari have secondarily invaded freshwater habitats. [36][37][38] Several mite groups that are mainly terrestrial, have a few aquatic representatives: e.g. Mesostigmata, Oribatida, Astigmata, Gamasida, Trombidia.…”

Section: Introductionmentioning

confidence: 99%

Water mites (Acari, Hydrachnidia): powerful but widely neglected bioindicators – a review

Goldschmidt

2016

Neotropical Biodiversity

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Various biomonitoring methods are used worldwide to evaluate water quality and the ecological integrity of freshwater habitats. Most of these methods are based upon macroinvertebrates, mainly insects, whereas water mites (Hydrachnidia) are widely neglected. In the present review, I summarize the diversity and ecology of water mites and evaluate their potential as bioindicators. Studies correlating water mite assemblages with water quality are presented in a detailed historical overview. Possible constraints to use this group as bioindicators are also discussed. The particular importance of Hydrachnidia in the monitoring of springs is discussed, as well as the state of knowledge on the ecology of neotropical water mites. I present the first data on water mites as bioindicators in streams in Costa Rica and Panama. The need for further research is explained and a call for collaboration is expressed.

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Section: Introductionmentioning

confidence: 99%

Water mites (Acari, Hydrachnidia): powerful but widely neglected bioindicators – a review

Goldschmidt

2016

Neotropical Biodiversity

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“… Testudacarinae Cook 1974: 145–146; Imamura 1976: 279; Fuste 1980: H7; Viets 1987: 222, 724; Bader 1988: 90; Smith and Cook 1991: 529, 552, 564–565, 574, 582; Cramer 1992: 13–14; Wiles 1997a: 192, 194, 199–200, 205, 209; Harvey 1998: 67; Smith and Cook 1999: 115; Smith et al 2001: 579, 592, 608, 625, 645; Guo and Jin 2005: 70; Abé 2005: 120; Abé 2006: 6; Davids et al 2007: 243; Goldschmidt 2007: 444; Boyaci and Özkan 2008: 364; Walter et al 2009: 264; Zhang and Guo 2010: 117–118; Jin et al 2010: 111; Smith et al 2010: 492, 522, 535, 550, 566; Guo and Zhang 2011: 46, 48–49; Esen and Erman 2014: 39; Proctor et al 2015: 622; Fisher et al 2015: 83–84.…”

Section: Taxonomymentioning

confidence: 99%

Systematics of testudacarine torrent mites (Acari, Hydrachnidia, Torrenticolidae) with descriptions of 13 new species from North America

O'Neill¹,

Fisher²,

Nelson³

et al. 2016

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Thirteen new species of North American Testudacarus (Torrenticolidae: Testudacarinae) are described: Testudacarus deceptivus O’Neill & Dowling, sp. n., Testudacarus hitchensi O’Neill & Dowling, sp. n., Testudacarus harrisi O’Neill & Dowling, sp. n., Testudacarus dennetti O’Neill & Dowling, sp. n., Testudacarus dawkinsi O’Neill & Dowling, sp. n., Testudacarus radwellae O’Neill & Dowling, sp. n., Testudacarus kirkwoodae O’Neill & Dowling, sp. n., Testudacarus hyporhynchus O’Neill & Dowling, sp. n., Testudacarus smithi O’Neill & Dowling, sp. n., Testudacarus rollerae O’Neill & Dowling, sp. n., Testudacarus elongatus O’Neill & Dowling, sp. n., Testudacarus rectangulatus O’Neill & Dowling, sp. n., and Testudacarus oblongatus O’Neill & Dowling, sp. n. Testudacarus vulgaris Habeeb, 1954 is resurrected from synonymy with Testudacarus minimus and redescribed. Debsacarus (Habeeb, 1961), Testudacarus americanus Marshall, 1943, and Testudacarus minimus Marshall, 1943 are redescribed. All redescriptions are from original types. Species delimination was accomplished through examination of morphology, biogeography, and molecular phylogenetics of the barcoding region of COI. Other species are addressed and a key to world species is presented. For Testudacarinae, this represents the first published: 1) descriptions from multiple specimens (i.e. intraspecific variation); 2) colored photographs; 3) explicit illustrations and discussion of sexual dimorphism within the subfamily; 4) genetic data. A comprehensive testudacarine reference list is also included.

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“…In addition, the dorsal furrow condition and the chaetotaxy of appendages have also been used as taxonomical characters for species diagnosis (Cook et al ., ; Proctor & Wilkinson, ; Smit, ). Other features that are frequently illustrated and qualitatively described, but never quantitatively evaluated as taxonomic characters, are the distribution patterns of special paired glands or glandularia located on the body surface; these glands are combined with setae that work as a trigger for the release of a defensive liquid (Cook, ; Smith, ; Bader, ,b, ; Bader & Sepasgozarian, , ; Shatrov, ; Proctor et al ., ). All these characters have helped to organize a useful classification system for this hyperdiverse genus, currently divided into nine subgenera; however, this scheme is rather artificial (Cook, , ; Viets, ; Cramer & Cook, ,b; Rosso de Ferradás, ), and the group is still in need of quantitative analyses of character variation and phylogenetic analyses of the grouping of species.…”

Section: Introductionmentioning

confidence: 97%

Geometric and traditional morphometrics for the assessment of character state identity: multivariate statistical analyses of character variation in the genusArrenurus(Acari, Hydrachnidia, Arrenuridae)

2016

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Geometric and traditional morphometric approaches are tested to describe and reveal taxonomic characters and character states in variation of shape and size of idiosoma morphology in the Arrenuridae. Patterns of variation of idiosoma and glandularia features of males from 11 Mexican species of Arrenurus (Megaluracarus) and two species of subgenus Dadayella were explored with five landmark configurations and three sets of interlandmark distances. Separate principal component analyses (PCA) and canonical variate analyses (CVA) were performed for each data set. The eight multivariate analyses of variance among 13 a priori groups (species) detected significantly different morphometric variants, which were interpreted as different taxonomic character states. Patterns of character state similarity among species were examined with unweighted-pair grouping method using averages (UPGMA) cluster analyses on Mahalanobis distances. Analyses of five landmark configurations revealed important taxonomical variation in the anterior idiosoma outline (10 character states), the outline of the posterior region or cauda (13 states), the distribution of postocularia, and the second and third pairs of dorsoglandularia (nine states), the fourth pair of dorsoglandularia (three states), and ventroglandularia on the posterior side of idiosoma (nine character states). Multivariate analyses of three sets of distance measurements also resulted in the detection of potential taxonomic characters related to idiosoma size (12 character states), postocularia and dorsoglandularia (13 states), and ventroglandularia (nine character states). Morphometric analyses of distances and shapes provide a formal basis for the interpretation of taxonomic characters, and for the discovery of character states. These characters should be investigated further in a wider sample of species for the phylogenetic systematics of these water mites. In the meantime, idiosoma regions and structures were tested for congruence in a phylogenetic analysis, and were proposed as homologous among the species sampled.

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Subphylum Chelicerata, Class Arachnida

Cited by 45 publications

References 114 publications

Water mites (Acari, Hydrachnidia): powerful but widely neglected bioindicators – a review

Water mites (Acari, Hydrachnidia): powerful but widely neglected bioindicators – a review

Systematics of testudacarine torrent mites (Acari, Hydrachnidia, Torrenticolidae) with descriptions of 13 new species from North America

Geometric and traditional morphometrics for the assessment of character state identity: multivariate statistical analyses of character variation in the genusArrenurus(Acari, Hydrachnidia, Arrenuridae)

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