P. Gnaspini

Publications60
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Citations922
Highly Influential Citations64
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A comparative analysis of the chemical nature of defensive secretions of Gonyleptidae (Arachnida: Opiliones: Laniatores)
Sexually dimorphic tegumental gland openings in Laniatores (Arachnida, Opiliones), with new data on 23 species
TLDR
This study reviews the literature for the Phalangida and presents new data for 23 species of Laniatores, finding previously undescribed sexually dimorphic glandular openings on the femur, patella, metatarsus, and tarsus of legs I and metatarsu of legs III and IV.
Comparative study of the defensive behavior and morphology of the gland opening area among harvestmen (Arachnida, Opiliones, Gonyleptidae) under a phylogenetic perspective.
Reproduction and postembryonic development of Goniosoma spelaeum, a cavernicolous harvestman from southeastern Brazil (Arachnida: Opiliones: Gonyleptidae)
TLDR
The reproductive characteristics of trogloxenic Goniosoma spelaeum were studied directly in the field in caves of the Ribeira River Speleological Province, Sao Paulo State, south-eastern Brazil, with one marked peak during the rainy season and a second minor peak in the dry season.
Sensory biology of Phalangida harvestmen (Arachnida, Opiliones): a review, with new morphological data on 18 species
Willemart, R. H., Farine, J.-P. and Gnaspini, P. 2008. Sensory biology of Phalangida harvestmen (Arachnida, Opiliones): a review, with new morphological data on 18 species. 2014Acta Zoologica…
An ethological approach to a SEM survey on sensory structures and tegumental gland openings of two neotropical harvestmen (Arachnida, Opiliones, Gonyleptidae)
TLDR
This work describes five new tegumental glands, one sexually dimorphic in the metatarsus IV of I. pustulosa males and two that are rubbed against the substrate while walking, present in both species, the first morphological evidence that harvestmen might leave chemical marks on the substrate.
CHEMICAL AND BEHAVIORAL DEFENSES OF A NEOTROPICAL CAVERNICOLOUS HARVESTMAN : GONIOSOMA SPELAEUM (OPILIONES, LANIATORES, GONYLEPTIDAE)
TLDR
The defensive behaviors were nipping with the chelicerae ; delivery of a sharp pinch with the fourth coxae and femora ; rapidly running away ; dropping from the cave ceiling and remaining concealed against the substrate ; and emission of a chemical defense compound.
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.
The occurrence of two adult instars among Grassatores (Arachnida: Opiliones)—A new type of life-cycle in arachnids
TLDR
It is the goal to formalize the working hypothesis that Grassatores have two (and only two) instars in the adult phase, which is strikingly different from all known arachnids.
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.
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