W. E. Duellman

W. E. Duellman
University of Kansas | KU · Biodiversity Institute

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186
Publications
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Publications

Publications (186)
Article
We review the systematics of the species of Gastrotheca (Anura: Hemiphractidae) in the highlands of the southern Ecuadorian Andes. We analyzed phylogenetic, morphological, ecological, and acoustic data from populations in the region. We provide an updated phylogenetic hypothesis inferred from a database that contains 42 species of Gastrotheca, and...
Article
Full-text available
Scinax is a speciose genus of Neotropical hylid frogs. We describe a new species from western Ecuador (elevations between 0 and 1207 m) using morphology, vocalizations, and DNA sequences. We also present a new phylogeny for Scinax based on mitochondrial DNA genes 12S rRNA, Cytochrome Oxidase sub-unit I, Cytochrome B, 16S rRNA, NADH dehy- drogenase...
Article
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Scinax exiguus was described from the Gran Sabana, southeastern Venezuela, and its distribution is associated with the one Amazonian savanna region in northern South America. Herein, we describe the aggressive call and redescribe the advertisement call of S. exiguus, including recordings from the type locality. Also, we report on intraspecific vari...
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We propose to recognise two tribes in the subfamily ACRIDINAE of the family HYLIDAE (AMPHIBIA, ANURA) and we point to nomenclatural problems of homonymy between the nomen of this subfamily and two familial nomina of ORTHOPTERA CAELIFERA. To solve these problems, we propose a solution that requires an action by the International Commission on Zoolog...
Article
Two new species of Gastrotheca are represented by adult females, genomic data of these are included in a phylogenetic analysis, whereby they are placed in the northern clade of the subgenus Gastrotheca. One new species, G. spectabilis, is unique within the genus in having a color pattern consisting of white labial, rostral, and canthal stripes. The...
Article
A phylogenetic analysis of sequences from 503 species of hylid frogs and four outgroup taxa resulted in 16,128 aligned sites of 19 genes. The molecular data were subjected to a maximum likelihood analysis that resulted in a new phylogenetic tree of treefrogs. A conservative new classification based on the tree has (1) three families composing an un...
Article
Full-text available
Scinax cruentommus (Anura: Hylidae) in the upper Rio Negro drainage, Amazonas state, Brazil, with the redescription of its advertisement call. We provide the first record for Scinax cruentommus from the upper Rio Negro, Amazonas state, Brazil. We also redescribe its advertisement call and make acoustic comparisons with available data for other spec...
Article
Full-text available
Scinax cruentommus (Anura: Hylidae) in the upper Rio Negro drainage, Amazonas state, Brazil, with the redescription of its advertisement call. for Scinax cruentommus from the upper Rio Negro, Amazonas state, Brazil. We also redescribe its advertisement call and make acoustic comparisons with available data for other species of the Scinax ruber Clad...
Book
This scientific masterpiece reveals many aspects of the lives of marsupial frogs and closely allied genera. Native to Central and South America, these amphibians differ from other frogs in that they protect their eggs after oviposition by either adhering them to the female’s back or placing them in a specialized dorsal pouch (thus the common name,...
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Based on preserved specimens from the states of Sao Paulo and Rio de Janeiro, Flectonotus ulei Miranda-Ribeiro, 1926 is resurrected from its synonymy with Flectonotus fissilis (Miranda-Ribeiro, 1920) and is redescribed. Analysis of osteological characters and brood pouch structure confirms that F. ulei belongs to Fritziana. The species is small for...
Article
Molecular phylogenetic analysis revealed the existence of two undescribed species of the hemiphractid genus Gastrotheca in the Andes in northern Peru. Both species are similar morphologically to Gastrotheca dysprosita and G. monticola, but they differ from these species and from one another in subtleties of coloration and minor variances in size an...
Article
Full-text available
Careful examination of morphological characters, color patterns, and advertisement calls strongly supports the placement of Dendropsophus allenorum (Duellman and Trueb, 1989) (Cuzco Reserve Frog) into the synonymy of Dendropsophus timbeba (Martins and Cardoso, 1987) (Cardoso's Treefrog).
Article
A new species of marsupial frog, genus Gastrotheca, is described from high-elevation grasslands in the Andes in Región Amazonas in northern Peru, where even calling males are well hidden in deep moss. The new species is distinguished from all congeners by its unique color pattern that includes a narrow, blackbordered, yellow middorsal stripe. The s...
Article
Full-text available
Molecular phylogenetic analyses based on expanded taxonomic and geographic sampling support the monophyly of the marsupial frog genera (family Hemiphractidae), resolve six geographically circumscribed lineages within Gastrotheca, and, for the first time, reveal that two divergent lineages of Gastrotheca inhabit the Atlantic Coastal Forests of Brazi...
Article
We describe a new species of Telmatobius from cloud forests in the valley of the Río Kosñipata in the Cordillera de Paucartambo, Región de Cusco, Peru, where it inhabits roadside ditches and forest streams. The new species is among the larger Telmatobius known. It has a short rostrum and exceedingly long jaw. Males have nuptial excrescences compose...
Article
Full-text available
Gastrotheca ruizi is an anuran species restricted to the Sibundoy Valley in southern Colombia, where it is reasonably abundant in agricultural areas. Its occurrence in anthropogenic habitats and apparent maintenance of a constant population level are significant evidence that the species is not threatened, as previously suggested; therefore, its co...
Article
Two new species of Pristimantis (Anura: Strabomantidae), tentatively assigned to the P. orestes Group, are described from humid puna (3596 m) of Cañaris, Provincia de Ferreñafe, Región Lambayeque on the eastern slopes of the Cordillera Occidental in northwestern Peru. Pristimantis mariaelenae sp. n. is a medium-sized species characterized by the do...
Article
Full-text available
The influence of calcitonin on cell growth was examined in the human breast cancer cell line, T 47D. These cells possess specific high-affinity receptors for calcitonin as well as a sensitive calcitonin-responsive adenylate cyclase. In the T 47D cells, low doses of salmon calcitonin initially stimulated cell growth and the incorporation of [3H]thym...
Article
Full-text available
Phylogenetic analyses of data derived from one mitochondrial gene and one nuclear gene show that the five species of small marsupial frogs currently recognized as Flectonotus are in fact two distinct and not closely related lineages. This conclusion is strongly supported by reproductive behavior and morphological characters. Thus, we recognize the...
Article
Full-text available
Gastrotheca nebulanastes sp. nov. from cloud forests in the upper Kosñipata Valley, Manu National Park, in the Andes of southern Peru is similar to G. excubitor, which inhabits grasslands in higher elevations than the cloud forests. The two spe-cies differ in relative lengths of the fingers, skin texture, coloration, and advertisement call. Althoug...
Article
Full-text available
Phylogenetic analyses of data derived from one mitochondrial gene and one nuclear gene show that the five species of small marsupial frogs currently recognized as Flectonotus are in fact two distinct and not closely related lineages. This conclusion is strongly supported by reproductive behavior and morphological characters. Thus, we recognize the...
Article
Full-text available
The distribution of the poorly known hylid frog Hypsiboas roraima Duellman & Hoogmoed, on the Guiana Shield is redefined, including new records from Venezuela. The advertisement call of this species is analyzed and Hypsiboas angelicus Myers & Donnelly is associated as a junior synonym of H. roraima.
Article
Full-text available
We studied populations of frogs of the genus Atelopus from the Pasto Massif of the Andes in southern Colombia and north-ern Ecuador, and from the Huancabamba depression in southern Ecuador and northern Perú and conclude that they belong to six species, five of which are described as new to science. Atelopus angelito is recorded for the first time f...
Article
Full-text available
The evolutionary relationships of Andean harlequin frogs were studied, with emphasis on the Atelopus ignescens and A. bomolochos species complexes. Sampling included 53 individuals belonging to eight taxa and several unidentified species, for which a mitochondrial fragment (16S, tRNA-Leu, ND1, and tRNA-Ile; 1294 bp) was amplified. Bayesian and Maxi...
Article
Full-text available
We studied populations of frogs of the genus Atelopus from the Pasto Massif of the Andes in southern Colombia and northern Ecuador, and from the Huancabamba depression in southern Ecuador and northern Perú and conclude that they belong to six species, five of which are described as new to science. Atelopus angelito is recorded for the first time fr...
Article
Full-text available
We provide the first report of reproduction in Gastrotheca testudinea. A brooding female from the Urubamba Valley in southern Peru gave birth to 59 froglets. This confirms the supposition that this species has direct development of eggs into froglets.
Article
Obituary: A Monument to Natural History – Henry S. Fitch (1909-2009)
Article
Gastrotheca piperata se describe de un bosque nublado en los Andes de Bolivia. La nueva especie es similar a Gastrotheca marsupiata, pero se diferencia de esta por su patrón de coloración y canto de anuncio. Al salir de la bolsa dorsal o marsupio, los renacuajos de G. piperata están en el estadio 36 ó 37 de Gosner, a diferencia de los renacuajos de...
Article
Full-text available
In this study, we determined how well the snout–vent length (SVL) of anurans estimated their mass for 36 species in the New World. Linear regressions of log-mass on log-SVL were highly significant for all species, explaining more than 75% of the mass variation in most species, and over 50% of the mass variation in all species. We also investigated...
Article
Full-text available
Three frogs of a new species found in cloud forests on two nearby mountains in Guyana were included in a molecularphylogeny of 17 nuclear and mitochondrial genes (10,739 aligned sites) that revealed that their closest relative is Terrarana (Brachycephalidae, Craugastoridae, Eleutherodactylidae, and Strabomantidae) and their next-closest relative is...
Article
Three frogs of a new species found in cloud forests on two nearby mountains in Guyana were included in a molecular phylogeny of 17 nuclear and mitochondrial genes (10,739 aligned sites) that revealed that their closest relative is Terrarana (Brachycephalidae, Craugastoridae, Eleutherodactylidae, and Strabomantidae) and their next-closest relative i...
Data
FIGURE 7. High-resolution tomographs of terraranan frogs representing two families (left, dorsal view; right, ventral view). (A – B) Eleutherodactylidae, Eleutherodactylus gossei (SBH 266440; and (C – D) Strabomantidae, Pristimantis pulvinatus (KU 166368). Scale bars = 5 mm.
Data
FIGURE 4. Distribution of the family Ceuthomantidae. Lowlands are indicated by green and uplands by brown. Known localities of the new family are indicated in the northeastern and southwestern portions of elevated areas on the Guiana Shield, in Venezuela, Brazil, and Guyana. (1) Mt. Kopinang, Guyana (C. smaragdinus, type locality), (2) Mt. Ayangann...
Data
FIGURE 9. (A) Bayesian and (B) maximum parsimony phylogenies of nobleobatrachian frogs represented by selected genera and constructed using sequences from 17 genes. The trees are rooted with Ranidae (not shown). Support values (Bayesian posterior probabilities or MP bootstrap values) are indicated at nodes.
Data
FIGURE 11. Timetree of nobleobatrachian frogs represented by selected genera and estimated with a Bayesian analysis of sequences from 9 genes, based on a topology obtained from the ML analysis of 17 genes (Figure 8). Numbers on nodes refer to time estimates and credibility intervals of time estimates (Table 2); those in bold are nodes discussed in...
Data
FIGURE 1. Dorsal view of female paratype of Ceuthomantis smaragdinus, KU 315000 SVL 19.5 mm. Arrows point to the dorsal glandlike structures. The third finger of the right hand is enlarged to show the notched anterior margin of the disc. Photographs by A. Campbell.
Data
FIGURE 2. Dorsal (A) and ventral (B) views of the holotype of Ceuthomantis smaragdinus (KU 300000) in life. Photographs by D. B. Means.
Data
FIGURE 5. Habitat of Ceuthomantis smaragdinus at 1540 m on Mt. Kopinang, Guyana. The holotype was found about 5 m from the stream in the foreground in Figure 5 A; the paratype was found on a leaf about 10 m away from the other side of the stream slightly to the left of the middle of Figure 5 B. Photographs by D. B. Means.
Data
FIGURE 6. High-resolution tomographs of terraranan frogs representing two families (left, dorsal view; right, ventral view). (A – B) Brachycephalidae, Ischnocnema guentheri (KU 92816); (C – D) Craugastoridae, Haddadus binotatus (KU 92808). Scale bars = 5 mm.
Data
FIGURE 8. Maximum likelihood phylogeny of nobleobatrachian frogs represented by selected genera and constructed using sequences from 17 genes. The tree is rooted with Ranidae (not shown). Bootstrap support values are indicated at nodes. Higher classification is indicated to the right.
Data
FIGURE 10. Phylogeny of nobleobatrachian frogs represented by selected species and constructed using sequences from 9 genes. The tree is rooted with Rana temporaria (not shown). Support values (ML bootstrap / Bayesian posterior probability / MP bootstrap) are indicated at nodes. Bayesian and MP support values are not given in cases where those phyl...
Article
Full-text available
Frogs of the family Hemiphractidae are unique among anurans in that the eggs develop on the back or in dorsal pouches in the female. A typical oviposition event began when the female elevated her rump slightly and large, white ovum was extruded. The female's cloacal opening was located at the top of her rump so that after the ovum was extruded, it...
Article
Full-text available
Two new species of the genus Pristimantis (Pristimantis) that are tentatively placed in the Pristimantis unistrigatus Group are described from the Yanachaga-Chemillén region in Departamento Pasco, Peru, where 24 species of strabomantid frogs are known. Both new species inhabit the humid montane forest on the slopes of the Andean Cordillera Oriental...
Article
If it had not happened so many times in the last two and a half centuries, we would be embarrassed to admit that we created a new homonym, but such is the case. We (Hedges, Duellman & Heinicke 2008:108) proposed the generic name Isodactylus with the type species Eleutherodactylus elassodiscus Lynch (Anura: Strabomantidae) and included in the genus...
Book
New World frogs recently placed in a single, enormous family (Brachycephalidae) have direct development and reproduce on land, often far away from water. DNA sequences from mitochondrial and nuclear genes of 344 species were analyzed to estimate their relationships. The molecular phylogeny in turn was used as the basis for a revised classification...
Article
New World frogs recently placed in a single, enormous family (Brachycephalidae) have direct development and reproduce on land, often far away from water. DNA sequences from mitochondrial and nuclear genes of 344 species were analyzed to estimate their relationships. The molecular phylogeny in turn was used as the basis for a revised classification...
Article
Two small new species of terrestrial frogs of the genus Phrynopus are described from the Andes in the Departement of Pasco in central Peru. The presence of a tympanum in one species is shared with P. peruanus. The second species shares characters with the larger P. dagmarae from the Departament of Huánuco. The new species are the smallest known mem...
Article
Full-text available
We describe three additional new species of Pristimantis from the Cordillera Yanachaga, a part of the Andes in central Peru. Analyses of DNA sequences of the mitochondrial rRNA genes show that onespecies is a close relative of P. bipunctatus (P. conspicillatus Group), another is a close relative of P. stictogaster (P. peruvianus Group), and the thi...
Article
Full-text available
Atelopus pachydermus is redescribed on the basis of the retraced holotype and recently collected specimens. Comparisons with the holotype confirmed that this species occurs neither in Pacific Colombia, nor in the northeastern Cordillera of Ecuador, as proposed by previous authors. It occurs in the northwestern Andes of Peru and adjacent Ecuador. Po...
Article
Using phylogeny-based methods to identify evolutionary transitions has become an integral part of evolutionary biology. Here, we demonstrate the potential for these methods to give statistically well-supported but misleading inferences about character evolution. We also show how inferences of character evolution can be informed using GIS-based meth...
Article
Atelopus pachydermus is redescribed on the basis of the retraced holotype and recently collected specimens. Comparisons with the holotype confirmed that this species occurs neither in Pacific Colombia, nor in the northeastern Cordillera of Ecuador, as proposed by previous authors. It occurs in the northwestern Andes of Peru and adjacent Ecuador. Po...
Article
Approximately one-half of all species of amphibians occur in the New World tropics, which includes South America, Middle America, and the West Indies. Of those, 27% (801 species) belong to a large assemblage, the eleutherodactyline frogs, which breed out of water and lay eggs that undergo direct development on land. Their wide distribution and mode...
Article
Two new species of Eleutherodactylus are described from the Cordillera Occidental in northern Peruvian departments of Ancash and La Libertad. The new species from La Libertad is assigned to the Eleutherodactylus orestes Group and inhabits puna at elevations of 3400–4010 m. The Eleutherodactylus orestes Group is redefined. The second new species is...
Article
Full-text available
Three new species of Eleutherodactylus are described from the Río Zaña Valley in the Pacific versant of the Cordillera Occidental in the Departamento de Cajamarca, Peru. One of the species is a member of the Eleutherodactylus conspicillatus Group, and two are members of the Eleutherodactylus unistrigatus Group. We recognize 15 species of Eleutherod...
Article
A distinctive, minute new species o f the Pristimantis unistrigatus Group is described from cloud forest at an elevation of 2850 m a .s. 1. in the Departamento de Piura in northern Peru. The single known specimen, an adult female ' 5.3 mm in snout-vent length, is blackish brown with orange-red blotches on the flanks and anterior surfaces of the thi...
Article
A New species of marsupial frog, Gastrotheca, with prominent cranial crests is described from humid montane forest on the eastern slopes of the Andes in Departmento de Pasco, Peru. The frog ahs an exceedingly robust cranium that most closely resembles that of G. cornuta; however, the cranial crests of G. cornuta are less well developed, and less ob...
Article
Two new sympatric species assignable to the Eleutherodactylus orestes Group were discovered in the northern part of the Cordillera Central of the Andes in northern Peru. One of the new species differs from all other members of the group by having conical tubercles on the eyelids and heels; the other species differs by having a white groin with brow...
Article
Nine species of Gastrotheca primarily have allopatric distributions in the Andes of northern Peru. A new species with integumentary-cranial co-ossification is described from montane forest in the northern part of the Cordillera Central in the Departamento de Amazonas, Peru. A second new species front the same area lacks integumentary-cranial co-oss...
Article
A small collection of anurans from the Cordillera Yanachaga in central Peru re- vealed the presence of 10 species of Eleutherodactylus. Four of these species are unknown elsewhere and are described herein. Three of the new species are mem- bers of the immense Eleutherodactylus unistrigatus group, and one belongs with the smaller, South American Ele...
Article
Full-text available
Gastrotheca piperata is described from Andean cloud forest in Bolivia. The new species is similar to Gastrotheca marsupiata but differs in coloration and advertisement call. Upon release from the maternal brood pouch, the tadpoles are in Gosner developmental stages 36 or 37, in contrast to the less developed (stages 30 or 31) tadpoles released by G...
Article
A new species of the Eleutherodactylus unistrigatus group is described from forests near Oxapampa, Peru, at elevations of 2050-2200 m in the Cordillera Oriental in central Peru. The new species differs from all described species by having an extremely long, acuminate snout and a red (white in preservative) longitudinal stripe on the posterior surfa...