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111 results for “Arthroleptidae”
Figure 5 in A new species of Cardioglossa (Amphibia: Anura: Arthroleptidae) endemic to Mount Manengouba in the Republic of Cameroon, with an analysis of morphological diversity in the genus
Figure 5. Tadpole of Cardioglossa manengouba sp. nov. (MCZ A-138156; Gosner stage 29/30). Radiographs of tadpole in dorsal (A) and lateral (B) views. Line drawings of tadpoles in dorsal (C), ventral (D) and left lateral (E) views. Scale bar = 1 mm. Abbreviations: at – anal tube; b – beak; fp – frontoparietal bone; g – gut; hb – hindlimb bud; ip – infraoral papillae; n – naris; ove – otic vesicle endolymph; s – sphenethmoid bone; sl – supraoral labium; st – spiracular tube.
Figure 1. A in A new species of Cardioglossa (Amphibia: Anura: Arthroleptidae) endemic to Mount Manengouba in the Republic of Cameroon, with an analysis of morphological diversity in the genus
Figure 1. A, map showing topography of Cameroon and neighbouring countries. Inset shows position of Cameroon within Africa. White star indicates position of Mount Manengouba. B, topographic map of Mt Manengouba showing the two known localities (black circles) of Cardioglossa manengouba sp. nov. Nsoung, a commonly visited collecting locality, is included for reference (black square).
Figure 7 in A new species of Cardioglossa (Amphibia: Anura: Arthroleptidae) endemic to Mount Manengouba in the Republic of Cameroon, with an analysis of morphological diversity in the genus
Figure 7. Scatter plot of the second and third principal component scores. The second principal component (PC2) is plotted against the third principal component (PC3). Lines are drawn to indicate the centroid of points for each species.
Figure 3 in A new species of Cardioglossa (Amphibia: Anura: Arthroleptidae) endemic to Mount Manengouba in the Republic of Cameroon, with an analysis of morphological diversity in the genus
Figure 3. Right lateral view of the head of the holotypes of Cardioglossa manengouba sp. nov. (A; male; MCZ A-137909) and C. oreas (B; female; MHNG 1253.87). Note the small tympanum and the swelling and fold immediately above and behind the tympanum. Ventral view of the right hand of a male paratype of C. manengouba (C; MCZ A-136933) and male C. oreas (D; MCZ A-137922). Scale bar = 1 mm.
Figure 6 in A new species of Cardioglossa (Amphibia: Anura: Arthroleptidae) endemic to Mount Manengouba in the Republic of Cameroon, with an analysis of morphological diversity in the genus
Figure 6. Scatter plot of the first and second principal component scores. The second principal component (PC2) is plotted against the first principal component (PC1), an indicator of body size. Lines are drawn to indicate the centroid of points for each species.
Phylogeny of African long-fingered frogs (Arthroleptidae: Cardioglossa) reveals recent allopatric divergences in coloration
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Data from: Description of the tadpoles of two Cameroonian frogs, Leptodactylodon axillaris and L. perreti (Anura: Arthroleptidae)
We describe the tadpoles of two closely related frog species of the genus Leptodactylodon (family Arthroleptidae), L. axillaris and L. perreti, that are restricted to the mountains of Cameroon. Tadpoles were collected from near the type locality of each species and identified using DNA sequence data. The tadpoles of both species are stream-dwelling and cryptic, often found in clumps of debris collected in the course of the stream, and orient roughly vertically in the water column with their mouths at or near the surface. As in L. ventrimarmoratus, the only other species in the genus described in detail, the tadpoles of these two species have a prominent umbelliform and up-turned oral disc, robust keratinous jaw sheaths, large lateral sacs along the elongate and dorsoventrally depressed body, and a robust elongate tail with short fins. Tadpoles of the two species are broadly similar morphologically. However, differences in the jaw sheaths may enable discrimination, including more pronounced laterally placed caniniform projections and more small needle-like serrations in the central region of the lower jaw sheath in L. perreti.
Data from: Two new species of long-fingered frogs of the genus Cardioglossa (Anura: Arthroleptidae) from Central African rainforests
We describe two new frog species of Cardioglossa (Family Arthroleptidae) from Central Africa. The new species are found in the rainforests of western-central Democratic Republic of the Congo and the Republic of the Congo near the Gabonese border, respectively. We demonstrate that these species are morphologically and genetically distinct from each other and all other species of Cardioglossa. Both new species lack the dorsal hour-glass pattern present in many species of the genus, but they can be distinguished from each other and related species by distinctive colour patterns on their lateral surfaces and extremities. Both new species most closely resemble C. gratiosa, which occurs in the Atlantic coastal forests extending from Cameroon through Gabon. The new species can be differentiated from C. gratiosa by the absence of black transverse bars on all limbs or by distinctive lateral colouration. Analysis of mitochondrial ribosomal 16S DNA sequences reveals low to moderate levels (1.9–7.5%) of divergence between these new species and closely related species of Cardioglossa. The floodplains of the Congo and Ubangi Rivers may be important geographic barriers for many of these species. The occurrence of these two new lowland species in the Congo Basin reveals that the distribution and diversity of Cardioglossa in this region was underestimated. In addition, we elevate C. nigromaculata inornata to species-level status, based in part on newly available colour photographs from 1950 of specimens from the only known locality.
Data from: A new squeaker frog (Arthroleptidae: Arthroleptis) from the Cameroon Volcanic Line with redescriptions of Arthroleptis adolfifriederici Nieden, 1911 "1910" and A. variabilis Matschie, 1893
We describe a new species of squeaker frog (Arthroleptis) from Mt. Manengouba in southwestern Cameroon. The new species is distinguished from other Cameroonian Arthroleptis by moderately larger body size; a darkened throat and posterior thigh, both with many white spots; and, in females, a fourth finger longer than the first and second fingers. This species corresponds to a Cameroonian taxon previously identified as Arthroleptis adolfifriederici but which has been long recognized as distinct. Multivariate morphometric analysis demonstrates that the new taxon is distinct from Arthroleptis variabilis, which occurs in the surrounding lowlands. Because of the general similarity of the new species to A. variabilis and its previous confusion with A. adolfifriederici, redescriptions of the latter two species are provided. This refinement of taxonomic knowledge will facilitate future study of cryptic or undescribed large Arthroleptis from western, central, and eastern Africa.
Data from: A new squeaker frog (Arthroleptidae: Arthroleptis) from the mountains of Cameroon and Nigeria
A new species of squeaker frog (genus Arthroleptis) is described from the northern mountains of the Cameroon Volcanic Line, a species-rich region within the West African biodiversity hotspot. This new species is associated with human-altered landscapes, including farms and grasslands, and is known from the highland areas near Bamenda, including Mt. Oku, Cameroon, as well as the Obudu and Mambilla Plateaus of eastern Nigeria. The known distribution suggests that it may eventually also be found throughout the Acha- Tugi Ridge that traverses the Cameroon–Nigeria border. More than 40 years ago, a specimen from one of these populations was recognized as probably representing a new species, but no further work was published on this material. We posit that the taxonomy of this new species has proven problematic because of morphological similarity to Arthroleptis poecilonotus. Although in some ways resembling A. poecilonotus, a molecular phylogeny based on mitochondrial gene sequence data demonstrates that the new species is not closely related to A. poecilonotus and, instead, forms a clade with A. krokosua, A. perreti, and A. variabilis. The new species is diagnosable by the combination of medium–small body size (24–29 mm snout–vent length in adult females), the color patterns of the venter and head, and a relatively stout hindlimb with a prominent inner metatarsal tubercle. The description of this new species further highlights these mountains as an important region of endemism within the Cameroon Volcanic Line.
FIGURE 4 in A new giant species of Arthroleptis (Amphibia: Anura: Arthroleptidae) from the Krokosua Hills Forest Reserve, south-western Ghana
FIGURE 4. UPGMA-Dendrogram of morphometric distance in giant Arthroleptis taxa based on species means of 13 morphometric ratios (see Table 1). Distance measure = "correlation", cf. Suzuki and Shimodaira (2006). Arthroleptis affinis was excluded from the analysis since the feet of the type specimen are badly damaged. Au = approximately unbiased p-value; bp = bootstrap probability; stippled square = cluster with highest au values; CAM = Cameroon, DRC = Democratic Republic of Congo, RW = Rwanda.
FIGURE 1 in A new giant species of Arthroleptis (Amphibia: Anura: Arthroleptidae) from the Krokosua Hills Forest Reserve, south-western Ghana
FIGURE 1. Dorsal (a), ventral (b), and latero-ventral (c) view of the Arthroleptis krokosua sp. nov. holotype (SMNS 12555). Photographs R. Ernst
FIGURE 2 in A new giant species of Arthroleptis (Amphibia: Anura: Arthroleptidae) from the Krokosua Hills Forest Reserve, south-western Ghana
FIGURE 2. Right hand and plantar surface of right foot of the Arthroleptis krokosua sp. nov. holotype (SMNS 12555). Photographs R. Ernst.
FIGURE 3 in The distribution of the Bururi Long-fingered Frog (Cardioglossa cyaneospila, family Arthroleptidae), a poorly known Albertine Rift endemic
FIGURE 3. Habitat at various localities for which C. cyaneospila is recorded. A. Along Rurezi Stream at eastern edge of Bururi Nature Reserve, Burundi (9 December 2011; photo: DCB). B and C from color glass slides deposited at the California Academy of Sciences (San Francisco, CA, USA). B. Luiko, DRC, verbatim information on slide: 'LUIKO 1850 m; 29-VI- 1950' (photo: R.F. Laurent). C. Mwana, DRC, verbatim information on slide: 'MWANA 1650m; 27-VII-50' (photo: R.F. Laurent); note tree ferns of the family Cyatheaceae in C. D. Within Nyungwe Forest National Park, Rwanda (18 June 2016; photo: CB).
FIGURE 2 in The distribution of the Bururi Long-fingered Frog (Cardioglossa cyaneospila, family Arthroleptidae), a poorly known Albertine Rift endemic
FIGURE 2. Four recent records of Cardioglossa cyaneospila. A. Unvouchered individual photographed in June 2009 from near Mubwindi Swamp in Bwindi Impenetrable National Park, Uganda (photo A. Bowley). B. Male (CAS 250950) collected in December 2011 in Bururi Forest Reserve in Burundi (photo: DCB). C. Female (UTEP 21433) collected in November 2015 in Nzovu sector of Kahuzi-Biega National Park in DRC (photo: G. Mitamba). D. Unvouchered individual in June 2016 from Nyungwe Forest National Parik, Rwanda (photo C. Boix).
FIGURE 1 in The distribution of the Bururi Long-fingered Frog (Cardioglossa cyaneospila, family Arthroleptidae), a poorly known Albertine Rift endemic
FIGURE 1. Distribution of Cardioglossa cyaneospila based on the type locality (star), other published localities (squares), and new records (circles) from either recent field research or various historical records (see Table 1). The environmental niche model (ENM) based on analysis using Maxent is shown in red, representing the fundamental niche (approximately 37,670 km2). Country abbreviations are as follows: BI, Burundi; CD, Democratic Republic of Congo; RW, Rwanda; TZ, Tanzania; UG, Uganda.
FIGURE 5 in A new beautiful squeaker frog (Arthroleptidae: Arthroleptis) from West Africa
FIGURE 5. Arthroleptis aureoli from the Western Area Peninsula Forest Reserve, Sierra Leone (a, b; photos: Abdulai Barrie) and a forest near Soyah, Guinea (c, d; ZMB 76844, adult male). Well visible in the male from Guinea is the hypertrophied third finger, beset with spines (c), as well as the transparent belly (d).
FIGURE 4 in A new beautiful squeaker frog (Arthroleptidae: Arthroleptis) from West Africa
FIGURE 4. Geographic position of the four known sites (white symbols) of Arthroleptis formosus sp. nov. in western Guinea, and the known distribution of A. aureoli in Sierra Leone and Guinea (black triangles). The two westernmost sites of the new species are very close to each other. The type locality is indicated by a star. The range of the new species is also indicated as black square in the inlet figure of Africa (map based on the ASTER Global Digital Elevation Model: www.ersdac.or.jp.).
FIGURE 3 in A new beautiful squeaker frog (Arthroleptidae: Arthroleptis) from West Africa
FIGURE 3. Habitats of Arthroleptis formosus sp. nov.; a) & b) habitat of ZMB 75483,(paratype), a degraded gallery forest with a fast flowing small river; c) the type locality, a degraded gallery forest where intensive logging activities where observed; d) female at the type locality.
FIGURE 2 in A new beautiful squeaker frog (Arthroleptidae: Arthroleptis) from West Africa
FIGURE 2. Ventral views of left hand (a) and left foot (b) of female Arthroleptis formosus sp. nov. (ZMB 75480, holotype).
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