Morphological variation and systematics of Dipsas catesbyi (Sentzen, 1796) and Dipsas pavonina Schlegel, 1837 (Serpentes: Dipsadinae)

Zootaxa ◽  
2009 ◽  
Vol 2203 (1) ◽  
pp. 31-48 ◽  
Author(s):  
ANA CAROLINE DE LIMA ◽  
ANA LÚCIA DA COSTA PRUDENTE
Keyword(s):  
South America ◽  
Geographic Variation ◽  
Geographic Distribution ◽  
Morphological Variation ◽  
Color Pattern ◽  
High Variability ◽  
The Other ◽  
Morphological Similarity ◽  
Morphometric Characters ◽  
Morphological Studies

The genus Dipsas includes approximately 32 species, distributed from Mexico to South America (Brazil, Argentina, Paraguay, Bolivia and Peru). High variability in color pattern and scalation has made it difficult to define limits among Dipsas species and to interpret patterns of geographic variation. We analyzed 14 meristic and 18 morphometric characters of 483 specimens of D. catesbyi and 129 specimens of D. pavonina, as well as their color pattern, coloration, hemipenis, cephalic glands and geographic distribution. We describe variation in meristic and morphometric characters and incorporate new characters into revised diagnoses. The results indicate a greater morphological similarity between D. catesbyi and species of Sibynomorphus than with the other species of Dipsas. More morphological studies should be done to evaluate current phylogenetic proposals for relationships within the tribe Dipsadini.

Geographic variation in caribou on the Canadian arctic islands

1982 ◽  
Vol 60 (10) ◽  
pp. 2442-2454 ◽  
Author(s):  
D. C. Thomas ◽  
P. Everson
Keyword(s):  
Geographic Variation ◽  
Rangifer Tarandus ◽  
Canadian Arctic ◽  
The Other ◽  
Long Bones ◽  
Body Measurements ◽  
Morphological Similarity ◽  
North Central ◽  
Barren Ground ◽  
Northern Regions

Analyses of body, leg bone, skull, and pelage data indicated a cline in the characters of caribou (Rangifer tarandus) from central Boothia Peninsula to the western Queen Elizabeth Islands. The main difference between the skulls of barren-ground caribou (R. t. groenlandicus) on central Boothia Peninsula and the more northerly Peary caribou (R. t. pearyi) was a shorter muzzle in the latter. Pelage tone was markedly lighter in Peary caribou and they were smaller in most body measurements, most notably in the length of long bones. Two major populations of Peary caribou were identified: one on the western Queen Elizabeth Islands (Parry Islands), the other on Somerset and Prince of Wales islands. Differences in skull size and form suggest that each population was composed of two or more subpopulations. The larger and darker R. t. groenlandicus occurred on north-central Boothia Peninsula and the two subspecies and apparent intergrades were present in winter on northern regions of the peninsula. The morphological similarity of Peary caribou on Somerset and Prince of Wales islands is explained by interisland movements resulting in genetic mixing. The same is true for caribou on the western Queen Elizabeth Islands and that population apparently has little genetic interchange with the other.

The presence of Homoeoneuria s.s. (Ephemeroptera: Oligoneuriidae) in South America with the description of a new species

Zootaxa ◽  
2009 ◽  
Vol 2146 (1) ◽  
pp. 53-60 ◽  
Author(s):  
F. F. SALLES ◽  
C. N. FRANCISCHETTI ◽  
E. D. G. SOARES
Keyword(s):  
New Species ◽  
South America ◽  
Anterior Margin ◽  
Adult Stage ◽  
Color Pattern ◽  
The Other ◽  
Southeastern Brazil ◽  
Compound Eyes ◽  
Stage 1 ◽  
A New Species

In the present work a new species of Homoeoneuria is described based on nymphs and adults from Southeastern Brazil. Based on cladistics, the new species belongs to the subgenus Homoeoneuria.s.s. Homoeoneuria (H). watu sp. n., besides being the second species of the genus reported from South America, is the first representative of the subgenus from the region. The new species can be distinguished from the other described species of the genus by the following combination of characters: In the adult stage, (1) pronotum with prominent posteromedian pale yellow spot almost reaching anterior margin; (2) abdominal color pattern; (3) shape of penes. In the nymph, (1) head heavily washed with brownish-orange between compound eyes and ocelli; (2) antennal pedicels with short, thick setae; (3) small paired tubercles present on vertex and anterior margin of pronotum; (4) galea-lacinia of maxillae with submarginal row of 20–21 long, spinous setae; (5) abdominal color pattern. Comments on the biology of the new species are also provided.

Distribution of the dwarf dog-faced bat Molossops temminckii (Chiroptera: Molossidae) in Colombia and comments on its morphometry

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Julio J. Chacón-Pacheco ◽  
Luis José Avendaño Maldonado ◽  
Carlos Agamez-López ◽  
Ingrith Yuliany Mejía-Fontecha ◽  
Daniela Velásquez-Guarín ◽  
...  
Keyword(s):  
South America ◽  
Morphological Variation ◽  
Principal Component ◽  
The Other ◽  
Cryptic Diversity ◽  
Vocal Plasticity ◽  
Morphometric Variation ◽  
Integrative Analyses ◽  
Principal Component Analyses

AbstractThe genus Molossops includes two species that are restricted to South America: Molossops neglectus and Molossops temminckii. The smaller dog-faced dwarf Molossops temminckii is distributed from Colombia to Argentina and has a wide morphological variation and vocal plasticity. In Colombia, this species remains poorly known. To fill distributional gaps, we present novel records from Arauca, Atlántico, Bolívar, Córdoba, and Huila departments. We also present an analysis of the morphometric variation in South America using Principal Component Analyses. These show an external and cranial difference of specimens of Colombia in respect of other and South America populations. In Colombian landscapes dominated by the floodplain savanna of the Orinoco region, Molossops temminckii is smaller than in the other regions of the country, and the previously suggested existence of cryptic diversity within the taxon should be evaluated. Therefore, we suggest further integrative analyses to investigate a possible subspecific status of some Colombian populations.

scholarly journals Snakes of the genus Oxyrhopus (Colubridae: Squamata) in Colombia: taxonomy and geographic variation

2009 ◽  
Vol 49 (25) ◽  
pp. 319-337 ◽  
Author(s):  
John D. Lynch
Keyword(s):  
Geographic Variation ◽  
Color Pattern ◽  
The Other

Four species of Oxyrhopus occur in Colombia, one (O. leucomelas) of which is Andean and the other three occur in lowlands. No geographic variation was detected in O. occipitalis but there is marked geographic variation in color pattern and scutellation for the widely distributed O. petola. Recognition of subspecies within O. petola is possible but appears to obscure more than it illuminates. The snake previously reported as O. melanogenys or O. aff. melanogenys is diagnosed as a previously unrecognized species.

Morphological variation, karyotype and reproduction of the parthenogenetic blind snake, Ramphotyphlops braminus, from the insular region of East Asia and Saipan

1991 ◽  
Vol 12 (2) ◽  
pp. 181-193 ◽  
Author(s):  
Addison H. Wynn ◽  
Tsutomu Hikida ◽  
Akira Mori ◽  
Hidetoshi Ota ◽  
Masafumi Matsui
Keyword(s):  
East Asia ◽  
Geographic Variation ◽  
Clutch Size ◽  
Morphological Variation ◽  
Ryukyu Archipelago ◽  
Morphometric Characters ◽  
Large Sample ◽  
Transverse Scale ◽  
Insular Region

AbstractMorphological variation, the karyotype, and reproduction in the parthenogenetic blind snake (Ramphotyphlops braminus) were studied on the basis of a large sample from the Ryukyu Archipelago, Taiwan, and Saipan. Meristic and morphometric characters showed little geographic variation. The numbers of transverse scale rings and vertebrae, each somewhat variable within the sample, were significantly correlated with each other. The karyotype of specimens from the Ryukyu Archipelago and Taiwan consists of 42 chromosomes best interpreted as forming 14 triplets, indicating that R. braminus from this region has a triploid karyotype. Clutch size varied from one to eight, and was significantly correlated with the snout-vent length. From observations of gonads in preserved specimens and from captive breedings, R. braminus begins reproduction after April in the Ryukyu region.

scholarly journals An updated diagnosis of the rare Amphisbaena slateri Boulenger, 1907, based on additional specimens (Squamata, Amphisbaenia, Amphisbaenidae)

2018 ◽  
Vol 2 (2) ◽  
pp. 125-135 ◽  
Author(s):  
Henrique C. Costa ◽  
Luke J. Welton ◽  
Jakob Hallermann
Keyword(s):  
Geographic Distribution ◽  
Morphological Variation ◽  
Rare Species ◽  
Color Pattern ◽  
Morphological Data ◽  
Zoological Museum ◽  
University Of Kansas ◽  
Unpublished Manuscript ◽  
The University

Amphisbaenaslateriis a rare species of worm lizard from Peru and Bolivia, known only from three specimens. We found two additional specimens of this taxon, housed at the herpetological collections of the Zoological Museum (Cenak), Universität Hamburg, and the University of Kansas Biodiversity Institute, updating its known geographic distribution and morphological variation. We also discovered an unpublished manuscript by late Carl Gans reporting the finding of the Hamburg specimen, which we reproduce here with the permission of his family.Amphisbaenaslaterican be identified by a combination of characters including counts of annuli, segments, and pores, the shape of head scales and color pattern. Basic morphological data is given for all species of Amphisbaenia known for Bolivia and Peru to aid in the identification of specimens from those countries.

Descriptions of seven new Acrogonia species from South America (Hemiptera: Cicadellidae: Cicadellinae: Proconiini)

Zootaxa ◽  
2018 ◽  
Vol 4374 (3) ◽  
pp. 375
Author(s):  
ROBERTA DOS SANTOS DA SILVA ◽  
RODNEY R. CAVICHIOLI ◽  
DANIELA M. TAKIYA ◽  
GABRIEL MEJDALANI
Keyword(s):  
New Species ◽  
South America ◽  
Male Genitalia ◽  
French Guiana ◽  
Color Pattern ◽  
The Other ◽  
External Morphology ◽  
Mato Grosso ◽  
Species Being ◽  
San Martín

Seven new species of the economically important sharpshooter genus Acrogonia Stål are described and illustrated: A. falcata sp. nov. (French Guiana and state of Amazonas, Brazil), A. felixi sp. nov. (department of Loreto, Peru), A. quintasi sp. nov. (state of Pará, Brazil), A. distincta sp. nov. (state of Amazonas, Brazil), A. dentata sp. nov. (department of San Martin in Peru, French Guiana, and states of Amazonas, Mato Grosso, Pará, and Rondônia in Brazil), A. luizi sp. nov. (province of Pastaza in Ecuador and state of Amazonas in Brazil), and A. lobulata sp. nov. (province of Orellana, Ecuador). In addition to the external morphology, color pattern, and male genitalia, detailed descriptions and illustrations of the female genitalia are provided for three of the new species (A. dentata, A. luizi, and A. lobulata). Females of the other four new species are unknown. Acrogonia includes now 39 species, being among the most species-rich genera of the Proconiini. 

scholarly journals Geographic Variation in Song of The Bright-Rumped Attila (Tyrannidae: Attila Spadiceus): Implications for Species Status

The Auk ◽  
2003 ◽  
Vol 120 (1) ◽  
pp. 69-74
Author(s):  
Daniel W. Leger ◽  
D. James Mountjoy
Keyword(s):  
Costa Rica ◽  
South America ◽  
Geographic Variation ◽  
Central America ◽  
The Other ◽  
Central American ◽  
Species Status ◽  
Qualitative Characteristics

Abstract Bright-rumped Attilas (Attila spadiceus) have two song forms, one sung primarily at dawn, the other primarily during the rest of the day. Both songs consist of a main phrase and an optional terminal phrase. Our recordings of dawn and day songs in Costa Rica were very similar to those made elsewhere in Central America. However, Central American dawn songs were significantly different than dawn songs from South America, both in terms of quantitative features (temporal and frequency variables) and qualitative characteristics (note shape). Day songs from Central and South America were similar. Song differences suggest that the Bright-rumped Attila may be two species, one in Central America, the other in South America.

A new species of Chilenoperla (Plecoptera: Gripopterygidae) from the Andes of South America

Zootaxa ◽  
2012 ◽  
Vol 3268 (1) ◽  
pp. 63
Author(s):  
ALEJANDRO VERA
Keyword(s):  
New Species ◽  
South America ◽  
Color Pattern ◽  
Andes Mountains ◽  
The Other ◽  
Male And Female ◽  
The Andes ◽  
A New Species

Chilenoperla puelche n. sp. is described based on male and female adults and one nymph. The wing color pattern and the gen-italia of the adults are diagnostic clearly distinguishing it from the other species of the genus. However, the nymph is similar tothat of C. elongata Vera. This new species is distributed in the Andes Mountains of Chile from 38° to 39° south latitude; Adults were collected in September and November.

scholarly journals Geographic distribution and morphological variation in Mimon bennettii (Chiroptera, Phyllostomidae)

2008 ◽  
Vol 98 (3) ◽  
pp. 404-411 ◽  
Author(s):  
Renato Gregorin ◽  
Guilherme L. Capusso ◽  
Vanessa R. Furtado
Keyword(s):  
Geographic Variation ◽  
Atlantic Forest ◽  
Geographic Distribution ◽  
Morphological Variation ◽  
Quantitative Data ◽  
Brazilian Cerrado ◽  
Qualitative Traits ◽  
Cerrado Biome

We studied discrete and quantitative data from 88 specimens of the subgenus Mimon previously identified as Mimon bennettii (Gray, 1838) and M. cozumelae Goldman, 1914 from diverse parts of their range. Our data indicate that specimens of Mimon bennetii in Brazil presented geographic variation in morphometrical characters and mosaic variation in qualitative traits. Specimens from the Cerrado biome collected in Brazilian states like Piaui, Tocantins, and Goiás have longer forearms than those distributed in the Atlantic and Amazon forested domains. Based on morphometrics, as showed by t-tests, specimens of M. bennettii from the Brazilian Cerrado resemble phenetically more with M. cozumelae than the M. bennettii from Atlantic Forest. Characters presently used to diagnosis M. cozumelae also were also recorded to M. bennettii in diverse parts of Brazil, making that validity of M. cozumelae questionable based on this kind of traits. This research also updated the geographic distribution to the M. bennettii in Brazil.

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