Interspecific variation in the microanatomy of cosmetid harvestmen (Arachnida, Opiliones, Laniatores)

@article{Rodriguez2014InterspecificVI,
  title={Interspecific variation in the microanatomy of cosmetid harvestmen (Arachnida, Opiliones, Laniatores)},
  author={Andrea L. Rodriguez and Victor R. Townsend and Megan B Johnson and Tara B White},
  journal={Journal of Morphology},
  year={2014},
  volume={275}
}
Scanning electron microscopy (SEM) is a useful tool for identifying interspecific variation in often overlooked structures that may represent useful sources for informative phylogenetic characters. In this study, we used SEM to compare the morphology of 12 cosmetid species from Central America, the Caribbean, and North America including multiple species for the genera Cynorta, Erginulus, and Paecilaema. To determine if microanatomical structures were unique to the cosmetid taxa under… Expand
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References

SHOWING 1-10 OF 42 REFERENCES
Reproductive morphology of three species of neotropical harvestmen (Opiliones, Laniatores, Gonyleptoidea)
TLDR
This study used scanning electron microscopy to examine variation in male and female reproductive morphology among three species of harvestmen that are members of the superfamily Gonyleptoidea and indicates that there are several features associated with ovipositor morphology among laniatorean harvest men that may represent potentially informative taxonomic characters. Expand
systematic revision of Goniosomatinae (Arachnida : Opiliones : Gonyleptidae), with a cladistic analysis and biogeographical notes
TLDR
A cladistic analysis and taxonomic revision of the species of Goniosomatinae and a new arrangement of genera (and species) are provided and the main taxonomic changes are given. Expand
Phylogeny of harvestmen family Gonyleptidae inferred from a multilocus approach (Arachnida: Opiliones)
TLDR
The traditional use of a small set of morphological characters in the systematics of Gonyleptidae is unable to explain the complex evolution of the family. Expand
A multilocus approach to harvestman (Arachnida: Opiliones) phylogeny with emphasis on biogeography and the systematics of Laniatores
TLDR
Age estimates for the main Opiliones lineages suggest a Carboniferous diversification of Cyphophthalmi, while its sister group, Phalangida, diversified in the Early Devonian, and most major lineages predate the Cretaceous. Expand
Comparative study of the morphology of the gland opening area among Grassatores harvestmen (Arachnida, Opiliones, Laniatores)
TLDR
It is concluded that most non-gonyleptoid Grassatores share a series of characteristics, mostly strongly different from what is observed within the gonylePToids, and that smaller groups seem to share diagnostic features related to chemical defence. Expand
A Review of Roquettea, with Description of Three New Brazilian Species and Notes on Gryne (Opiliones, Cosmetidae, Discosomaticinae)
The genua Roquettea Mello-Leitão, hitherto monotypic and known from Brazilian state of Pará, is rediagnosed, the type species, Roquettea singularis is redescribed, including a report on two maleExpand
Key to the Species of Cosmetidae (Arachnida, Opiliones) of Central America, with Notes on Penis Morphology and Sexual Dimorphisms
To facilitate identification of harvestmen of the family Cosmetidae in Central America, we developed dichotomous keys that distinguish the 33 known genera and the 133 described species for thisExpand
REDESCRIPTION OF THE TYPE SPECIES OF CYNORTA (ARACHNIDA, OPILIONES, COSMETIDAE)
TLDR
Genital morphology of the species is described for the first time and an effort has been made to detect diagnostic characters for the genus Cynorta, which was used in many different senses in the past and includes a large number of unrelated Neotropic species. Expand
MORPHOLOGY OF THE DORSAL INTEGUMENT O F TEN OPILIONID SPECIES (ARACHNIDA, OPILIONES )
TLDR
Variations in the generalized tuberculate-granulat e morphology were observed in eight of the ten species studied, and comparisons presented provide a terminology for describing opilionid cuticular features. Expand
A scanning electron microscopic survey of the cuticle in Cyphophthalmi (Arachnida, Opiliones) with the description of novel sensory and glandular structures
TLDR
The cuticular surfaces of Cyphophthalmi (Opiliones) were studied in detail, covering a wide range of their taxonomic diversity, including a sexually dimorphic row of spines and glandular openings on leg I of Fangensis cavernarum. Expand
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