Intraspecific Morphological Variation in the Dragonfly Erythrodiplax Media (Odonata: Libellulidae) Among South American Grassland Physiognomies

2021 ◽  
Author(s):  
Mateus Marques Pires ◽  
Gérson Luiz Ely-Junior ◽  
Marina Schmidt Dalzochio ◽  
Göran Sahlén ◽  
Eduardo Périco
Keyword(s):  
Morphological Variation ◽  
South American ◽  
Intraspecific Morphological Variation

AN ANALYSIS OF INTERSPECIFIC AND INTRASPECIFIC MORPHOLOGICAL DIFFERENCES IN TWO CLOSELY RELATED SPECIES OF AMBLYSEIUS BERLESE USING METHODS OF NUMERICAL TAXONOMY (ACARINA: PHYTOSEHDAE)

1977 ◽  
Vol 109 (12) ◽  
pp. 1605-1618 ◽  
Author(s):  
D.A. Chant ◽  
R.I.C. Hansell ◽  
H.J. Rowell
Keyword(s):  
Host Plant ◽  
Morphological Variation ◽  
Related Species ◽  
Numerical Taxonomy ◽  
Valid Species ◽  
Closely Related Species ◽  
Multivariate Tests ◽  
Taxonomic Methods ◽  
Morphological Differences ◽  
Intraspecific Morphological Variation

AbstractMorphological variation between two closely related species in the genus Amblyseius Berlese was examined by numerical taxonomic methods. Multivariate tests indicated that A. canadensis Chant and Hansell and A. novaescotiae (Chant) represent two separate and distinct morphological groups. This supports their taxonomic retention as valid species. Intraspecific morphological variation was also examined and found to be correlated with climatic and host plant variables.

scholarly journals First data of Iberian Nematomorpha, with redescription of Gordius aquaticus Linnaeus, G. plicatulus Heinze, Gordionus wolterstorffii (Camerano) and Paragordius tricuspidatus (Dufour)

2001 ◽  
Vol 70 (2) ◽  
pp. 73-84 ◽  
Author(s):  
Leonor Cristina de Villalobos ◽  
Ignacio Ribera ◽  
David T. Bilton
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Iberian Peninsula ◽  
Morphological Variation ◽  
Reliable Data ◽  
Intraspecific Morphological Variation ◽  
Scanning Electron ◽  
Ne Spain

Four species of Nematomorpha are recorded from NE Spain, representing the first reliable data on the group in the Iberian peninsula. Gordius aquations Linnaeus, 1758, G. plicatulus Heinze, 1937, Gordionus wolterstorffii (Camerano, 1888) and Paragordius tricuspidatus (Dufour, 1828) are redescribed based on scanning electron microscope observations. Notes on intraspecific morphological variation and ecology of the species are given.

Morphological Variation in the South American Snake-Necked Turtle Hydromedusa tectifera (Testudines: Chelidae)

2010 ◽  
Vol 9 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Sabrina Clavijo-Baquet ◽  
Marcelo Loureiro ◽  
Federico Achaval
Keyword(s):  
Morphological Variation ◽  
South American ◽  
The South

Distribution and morphological variation of Synalpheus superus Abele and Kim, 1989 and notes on the distribution of S. fritzmuelleri Coutière, 1909 (Decapoda: Caridea: Alpheidae)

Zootaxa ◽  
2010 ◽  
Vol 2505 (1) ◽  
pp. 65
Author(s):  
MARGARITA HERMOSO-SALAZAR ◽  
VIVIANNE SOLÍS-WEISS
Keyword(s):  
Morphological Variation ◽  
Gulf Of California ◽  
Eastern Pacific ◽  
Single Specimen ◽  
Northern Limit ◽  
Snapping Shrimp ◽  
Intraspecific Morphological Variation

A significant intraspecific morphological variation was observed in the eastern Pacific snapping shrimp Synalpheus superus Kim & Abele, 1989, especially in the proportions of some cephalotoracic appendages. The northern limit of the distribution of S. superus is expanded from Panama to Guerrero, Mexico. We also consider that Synalpheus fritzmuelleriCoutière, 1909 is most probably not an amphi-American species. Its former status as such was due to taxonomic misinterpretations by Hernández Aguilera et al. (1986) and probably by Coutière (1909) himself, although his questionable record of a single specimen of S. fritzmuelleri from the Gulf of California could not be verified, because the specimen could not be located and may be lost.

scholarly journals A quantitative assessment of intraspecific morphological variation in Gahagan bifaces from the southern Caddo area and central Texas

2019 ◽  
Author(s):  
Robert Z. Selden ◽  
John E. Dockall ◽  
Morgane Dubied
Keyword(s):  
Morphological Variation ◽  
Quantitative Assessment ◽  
Time Span ◽  
The Other ◽  
Raw Material ◽  
Material Source ◽  
Hunter Gatherers ◽  
Size Discrepancy ◽  
Central Texas ◽  
Intraspecific Morphological Variation

This investigation aggregates intact or reconstructed Gahagan bifaces from the southern Caddo area and central Texas to test the hypothesis that Gahagan biface morphology differs between the regions. The Gahagan bifaces (n = 102) were scanned, then analysed using a novel landmarking protocol and the tools of geometric morphometrics. Results provide a preview of the significant differences in Gahagan biface morphology expressed between the southern Caddo area and central Texas regions. The size discrepancy represents an inversion of current theoretical constructs that posit a decrease in tool size thought to articulate with an increase in distance from the raw material source. It is posited that the contrasting morphologies represent two discrete communities of practise; one (emergent Caddo horticulturalists) where Gahagan bifaces were enlisted primarily for burial and ritualistic activities, and the other (central Texas hunter-gatherers) where Gahagan bifaces were utilised over a longer time span in more practical and utilitarian contexts.

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