scholarly journals CONTINENTAL PATTERNS OF MORPHOLOGICAL VARIATION IN A SOUTH AMERICAN SPARROW

Evolution ◽  
1983 ◽  
Vol 37 (5) ◽  
pp. 920-930 ◽  
Author(s):  
Paul Handford
Keyword(s):  
Morphological Variation ◽  
South American

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

Transfer of two South American ant species from Tapinoma Foerster 1850 to Forelius Emery 1888 (Hymenoptera: Formicidae: Dolichoderinae)

Zootaxa ◽  
2021 ◽  
Vol 4920 (3) ◽  
pp. 428-438
Author(s):  
ROBERTO J. GUERRER
Keyword(s):  
Morphological Variation ◽  
Taxonomic Status ◽  
Morphological Evidence ◽  
South American ◽  
Taxonomic Changes

Some species of the ant genus Forelius can be misclassified as the genus Tapinoma due to the convergent reduction of the petiolar scale. I review the taxonomic status of Tapinoma antarcticum Forel 1904 and Tapinoma heyeri Forel 1902. Morphological evidence supports the transfer of these names to the ant genus Forelius. Proposed taxonomic changes are as follows: Forelius antarcticus (Forel) comb. nov. (=Forelius fazi (Santschi 1923) comb. nov., =Forelius eidmanni Goetsch 1933 comb. rev.); Forelius heyeri (Forel) comb. nov. (=Forelius heyeri risii (Forel 1912) comb. and syn. nov., =Forelius pusillus (Santschi 1922) syn. nov., =Forelius tucumanus (Kusnezov 1953) syn. nov.). Lectotypes for Forelius antarcticus and Forelius heyeri are designated. The worker of Forelius heyeri, as well as the worker and queen of Forelius antarcticus are diagnosed and redescribed. Multifocus images for lectotype workers are provided. Morphological variation within and between species of Forelius with rounded spiracles is discussed. 

Diversification in the South American Pampas: the genetic and morphological variation of the widespreadPetunia axillariscomplex (Solanaceae)

2014 ◽  
Vol 23 (2) ◽  
pp. 374-389 ◽  
Author(s):  
Caroline Turchetto ◽  
Nelson J. R. Fagundes ◽  
Ana L. A. Segatto ◽  
Cris Kuhlemeier ◽  
Viviana G. Solís Neffa ◽  
...  
Keyword(s):  
Morphological Variation ◽  
South American ◽  
The South

Morphological variation in Bromus sect. Ceratochloa germplasm of Patagonia

2004 ◽  
Vol 82 (1) ◽  
pp. 136-144 ◽  
Author(s):  
Alicia N Massa ◽  
Kevin B Jensen ◽  
Steve R Larson ◽  
David J Hole
Keyword(s):  
Morphological Variation ◽  
Common Garden ◽  
Type Specimen ◽  
Molecular Data ◽  
Mantel Test ◽  
South American ◽  
Test Statistic ◽  
Plant Materials ◽  
Variable Species ◽  
Nearly Continuous

South American representatives of Bromus sect. Ceratochloa make up a morphologically diverse group of grasses indigenous to the southern Andes of Argentina and Chile. The objectives of the present study were to describe patterns of morphological variation among 30 accessions representing six species (Bromus catharticus Vahl, Bromus coloratus Steud., Bromus lithobius Trin., Bromus mango E. Desv., Bromus stamineus E. Desv., and Bromus tunicatus Phil.) in a common garden, correlate morphological and previously obtained molecular data, and develop a taxonomic treatment within sect. Ceratochloa of South America. Plant materials included 28 hexaploid (2n = 6x = 42) and 2 octoploid (2n = 8x = 56) accessions. Based on multivariate analyses of 24 characters, the two octoploid accessions formed an isolated, well-defined group, while the hexaploids formed two less-defined groups. Characterized by lemma awns longer than 3 mm, one group consisted of those accessions of B. coloratus, B. lithobius, and B. stamineus, whereas the other group consisted of B. catharticus, B. mango, and B. tunicatus. A significant Mantel test statistic (r = 0.70, P = 0.001) suggested a high correlation between morphological variation and DNA polymorphism. Taken together, our results indicated that the hexaploid complex should be described as a single variable species (B. cathar ticus), with two nearly continuous groups: B. catharticus subsp. catharticus (Vahl) Herter and B. catharticus subsp. stamineus (E. Desv.) Massa. Based on nomenclature priority and type specimen designations, the octoploid accessions should be described as Bromus coloratus.Key words: Bromus, morphology, multivariate analysis, Patagonia, taxonomy.

On the taxonomic status of the genus Horvathinia Montandon (Hemiptera: Belostomatidae)

Zootaxa ◽  
2005 ◽  
Vol 1016 (1) ◽  
pp. 21 ◽  
Author(s):  
JUAN A. SCHNACK ◽  
ANA L. ESTÉVEZ
Keyword(s):  
Morphological Variation ◽  
Taxonomic Status ◽  
Rio Grande ◽  
Species Level ◽  
South American ◽  
Rio Grande Do Sul ◽  
Diagnostic Species

Nine species of Horvathinia have been described since Montandon (1911) described H. pelocoroides, a description based upon two specimens. Subsequent descriptions, of H. argemii Schnack, H. bollei De Carlo, H. castilloi De Carlo, H. doellojuradoi De Carlo, H. forsteri Lauck, H. lenti De Carlo, H. meyeri De Carlo, H. pelleranoi De Carlo, and H. schubarti De Carlo, were based on only one specimen, each all captured while flying at lights. In February 1981, 55 specimens of Horvathinia were collected flying at light in Torres, Rio Grande do Sul, Brazil. The morphological variation of these specimens is similar to that diagnostic species-level characters in describing Horvathinia species. Therefore, we consider that the southern South American genus Horvathinia is monotypic. However, as far as the type of H.lenti could not be examined, we therefore synonymize all species described after 1911 with H. pelocoroides, except for H. lenti. We also redescribe H. pelocoroides Montandon.

A new species of genus Eulimnadia Packard, 1874 (Branchiopoda: Spinicaudata: Limnadiidae) from India with an updated key for some Indian species

Zootaxa ◽  
2018 ◽  
Vol 4399 (3) ◽  
pp. 341
Author(s):  
SAMEER M. PADHYE ◽  
NICOLAS RABET ◽  
MIHIR R. KULKARNI ◽  
MARCO PAGNI
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Morphological Characteristic ◽  
The State ◽  
Indian Species ◽  
South American ◽  
Egg Morphology ◽  
Available Information ◽  
Eggshell Structure ◽  
A New Species

We describe a new species of Eulimnadia, Eulimnadia bondi sp. nov., from the state of Goa, India. This is the 8th species to be described from the country and first from this state. This species differs from all other Indian species in having unique egg morphology–cylindrical egg with dilated borders at both ends and a specific internal eggshell structure. Specimens showed intra-population morphological variation as observed in other species from the genus. Eulimnadia bondi sp. nov. egg resembles the South American E. colombiensis and the Australian E. australiensis. These species are however distinguished on egg morphological details and by some morphological characteristic of adults. Based on the available information, we present an overview of the distribution of the different Indian Eulimnadia species and an updated identification key based on egg morphology. 

scholarly journals Morphological Variation in the Vriesea procera complex (Bromeliaceae, Tillandsioideae) in the Brazilian Atlantic Rainforest, with Recognition of New Taxa

2020 ◽  
Vol 45 (1) ◽  
pp. 53-68 ◽  
Author(s):  
Fernando Pérez Uribbe ◽  
Beatriz Neves ◽  
Suara Souza Almeida Jacques ◽  
Andrea Ferreira da Costa
Keyword(s):  
New Taxa ◽  
Morphological Variation ◽  
Atlantic Coast ◽  
Natural Populations ◽  
Atlantic Rainforest ◽  
Coastal Vegetation ◽  
South American ◽  
Morphometric Analyses ◽  
The Family ◽  
Brazilian Atlantic Rainforest

Abstract—The family Bromeliaceae is essentially Neotropical, with high endemism and diversity in the Atlantic Rainforest Domain. Species circumscription is a major problem in the family systematics, especially in the most diverse genera. Species of the Vriesea procera complex, which occur in forests and restinga (coastal vegetation) along the South American Atlantic coast from Venezuela to southern Brazil, share the same basic vegetative and reproductive morphological patterns. However, they vary widely in the number and position of inflorescence branches as well as in the dimensions, position, and shape of the leaves and flowers in different populations. Here we aimed 1) to evaluate the morphological variation in the V. procera complex, through morphometric analyses of natural populations along the Brazilian Atlantic Rainforest; and 2) to determine the taxonomic relationships among these species, establishing the validity and the limits of variation of the taxa through taxonomic treatment. Fourteen natural populations, 271 individuals, and 36 morphometric variables were analyzed. Kruskal-Wallis tests and discriminant analyses were conducted to test statistical differences between previously established groups. Of an original three species and three varieties, our data allowed us to recognize six species, including three new taxa (Vriesea aureoramosa, V. magna, V. rubroviridis) and one new name and status (V. flexuosa). The resulting taxa are distinguished by the inflorescence and leaf sizes and especially by floral characteristics such as the length of bracts, sepals, petals, stamens, and pistils, besides the petal apex posture and relative position of the stamen during anthesis. Recognition of cryptic species under the names V. procera and V. neoglutinosa is an important step toward a better understanding of the biodiversity of the Brazilian Atlantic Rainforest.

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