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FIGURE 22 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 22. Radfordia (M.) ladakensis Fain and Lukoschus, 1976, female. A, dorsal view; B, ventral view; C, seta m; D, vulvar region. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 20 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 20. Radfordia (M.) golenishchevi sp. nov., male holotype. A, dorsal view; B, ventral view; C, seta m; D, genital cone. Scale bars: A, B = 100 µm; C, D = 50 µm.

FIGURE 64 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 64. Simplified phylogeny of the subfamily Arvicolinae. Derived from: Robovsky et al. 2008—general scheme; Lebedev et al. 2007—phylogeny of Myodini; Luo et al. 2004—phylogeny of Eothenomys.

FIGURE 63 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 63. Radfordia (M.) cricetulus Fain, 1973 from Cricetulus migratorius, female tritonymph. A, idiosoma in dorsal view; B, same in ventral view; C, tarsus IV in ventral view. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 62 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 62. Radfordia (M.) cricetulus Fain, 1973 from Cricetulus migratorius, male. A, dorsal view; B, ventral view; C, genital cone. Scale bars: A, B = 100 µm; C = 50 µm.

FIGURE 61 in Mites of the subgenus Microtimyobia (Acariformes: Myobiidae: Radfordia) and their host-parasite relationships with cricetid rodents (Cricetidae) 2954

FIGURE 61. Radfordia (M.) cricetulus Fain, 1973 from Cricetulus migratorius, female. A, dorsal view; B, ventral view; C, seta m. Scale bars: A, B = 100 µm; C = 50 µm.

opennotspecifiedMar 2011View details →

FIGURE 3 in On the taxonomic status of the Brazilian mouse Calomys anoblepas Winge, 1887 (Mammalia, Rodentia, Cricetidae)

FIGURE 3. Detailed comparisons involving Calomys anoblepas (left column), Juliomys (middle column; J. pictipes, CM 2762), and Wilfredomys (right column; W. oenax, CNP 2378): palate near M1 (upper row) and palate near M3 (lower row) regions. Black line indicators denote the posterior end of the incisive foramen (fi) and the anterior end of the mesopterygoid fossa (me). Additional abbreviations: M1 = first upper molar; M3 = third upper molar; ma = maxillary; pa = palatine; ppp = posterolateral palatal pit. Not scaled.

FIGURE 8 in A new species of long-tailed mouse, genus Oligoryzomys Bangs, 1900 (Rodentia: Cricetidae), from the Bolivian Yungas

FIGURE 8. Dorsal and ventral, views of the skin of Oligoryzomys pachecoi n. sp. (Holotype, MSB 67304). Scale bar 5 cm.

FIGURE 7 in A new species of long-tailed mouse, genus Oligoryzomys Bangs, 1900 (Rodentia: Cricetidae), from the Bolivian Yungas

FIGURE 7. Dorsal, ventral, and lateral views of the skull, and lateral view of the mandible of Oligoryzomys pachecoi n. sp. (Holotype, MSB 67304). Scale bar 10 mm.

FIGURE 6. A in A new species of long-tailed mouse, genus Oligoryzomys Bangs, 1900 (Rodentia: Cricetidae), from the Bolivian Yungas

FIGURE 6. A) Scatterplot without size effect of the first two principal components (PC1 and PC2) of the cranial variables of Oligoryzomys brendae, O. destructor, O. f. occidentalis, Oryzomys chaparensis, and Oligoryzomys pachecoi n. sp. B) Scatterplot without size effect of the first two discriminant functions (DF1 and DF2) of the cranial variables of Oligoryzomys brendae, O. destructor, O. f. occidentalis, Oryzomys chaparensis, and Oligoryzomys pachecoi n. sp.

FIGURE 3 in A new species of long-tailed mouse, genus Oligoryzomys Bangs, 1900 (Rodentia: Cricetidae), from the Bolivian Yungas

FIGURE 3. Comparisons (from left to right) among Oligoryzomys brendae (MACN 26304), O. destructor (FMNH 24611), O. f. occidentalis (MSB 55318), and Oligoryzomys pachecoi n. sp. (MSB 67304). First row: partial view of the rostrum; second row: partial view of the palatal region and mesopterygoid zone; third row: partial view of the left side of the skull; fourth row: partial view of the jaw. Abbreviations, ab: auditory bullae; ap: angular process; cc: carotid canal; cdp: condylar process; crp: coronoid process; et: Eustachian tube; if: incisive foramina; hp: hamular process; occ: occipital condyle; palc: posterior opening of alisphenoid canal; pgf: postglenoid foramen; ssf: subsquamosal fenestra; zn: zygomatic notch; zp: zygomatic plate.

FIGURE 1 in A new species of long-tailed mouse, genus Oligoryzomys Bangs, 1900 (Rodentia: Cricetidae), from the Bolivian Yungas

FIGURE 1. Bayesian Inference tree resulting from the analysis of cytochrome b gene sequences of species of Oligoryzomys. Numbers indicate posterior probability (PP) values of the adjacent node retrieved in the Bayesian Inference (BI, left to the diagonal) and bootstrap support (BS) values gathered in the Maximum Likelihood analysis (ML, right to the diagonal). A lessthan sign (<) indicates that the given clade receives less than 0.5 of PP or 50 % of BS either in the BI or ML analyses, respectively. A dash (-) indicates that in the ML analysis that clade was not recovered. Gray boxes highlight lineages of O. brendae, O. destructor and Oligoryzomys sp. (Taken with modifications from Hurtado & D'Elía 2018).

opennotspecifiedOct 2010View details →

FIGURE 3 in A phylogenetic analysis of Neotoma varia (Rodentia: Cricetidae), a rediscovered, endemic, and threatened rodent from Datil Island, Sonora, Mexico

FIGURE 3. Oclusal view of the upper molars: (A) N. varia, (B) N. albigula albigula, (C) N. a. melanura, (D) N. a. seri, and (E) N. a. venusta. M1 is the first molar, M2 the second molar, and M3 the third molar. (I) Is the contact area between the lobes of the fist molar and the second. (II) Is the presence of three lobes in the third molar.

opennotspecifiedOct 2010View details →

FIGURE 1. Localities for Neotoma varia and N in A phylogenetic analysis of Neotoma varia (Rodentia: Cricetidae), a rediscovered, endemic, and threatened rodent from Datil Island, Sonora, Mexico

FIGURE 1. Localities for Neotoma varia and N. albigula specimens examined in this study. The numbers correspond to specific localities in Table 1.

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Bayesian morphological clock versus parsimony: An insight into the relationships and dispersal events of postvacuum Cricetidae (Rodentia, Mammalia)

<p>Establishing an evolutionary timescale is fundamental for tackling a great variety of topics in evolutionary biology, including the reconstruction of patterns of historical biogeography, coevolution and diversification<span>. </span>However, the tree of life is pruned by extinction and very generally molecular data cannot be gathered for extinct lineages. Methodological challenges have prevented until recently the application of tip-dating Bayesian approaches in morphology-based fossil-only datasets. Herein we present a morphological dataset for a group of cricetid rodents to which we apply a battery of methods fairly new in palaeontology that can be used by palaeontologists for the analysis of entirely extinct clades. We compare the tree topologies obtained by traditional parsimony, Bayesian dated and undated phylogenetic approaches and calculate stratigraphic congruence indices for each. Bayesian tip-dated clock methods seem to outperform parsimony in the case of our dataset, which includes highly homoplastic morphological characters. Regardless, all three topologies support the monophyly of Megacricetodontinae, Democricetodontinae and Cricetodontinae. Dispersal and speciation events inferred through Bayesian Binary Markov chain Monte Carlo and biodiversity analyses provide evidence for a correlation between biogeographic events, climatic changes and diversification in cricetids.</p>

opencc-zeroDec 2020View details →

FIGURE 10 in A preliminary review of Nephelomys albigularis (Tomes, 1860) (Rodentia: Cricetidae), with the description of a new species from the Peruvian montane forests

FIGURE 10. Dorsal and ventral views of the skin of Nephelomys ricardopalmai sp. nov. (MUSM 46989, holotype).

FIGURE 8 in A preliminary review of Nephelomys albigularis (Tomes, 1860) (Rodentia: Cricetidae), with the description of a new species from the Peruvian montane forests

FIGURE 8. Specimen of Nephelomys ricardopalmai sp. nov. (MUSM 46989, holotype) from Huiquilla, Amazonas Department. The right hindfoot is shown in the upper left margin (MUSM 46993). On the right side of the head of the specimen, note the presence of two staphylinid beetles. Photographs taken by V. Pacheco.

FIGURE 11 in A preliminary review of Nephelomys albigularis (Tomes, 1860) (Rodentia: Cricetidae), with the description of a new species from the Peruvian montane forests

FIGURE 11. Habitat of Nephelomys ricardopalmai showing the montane forest at the Área de Conservación Privada Huiquilla, Amazonas. Photo taken by V. Pacheco.

FIGURE 5 in A preliminary review of Nephelomys albigularis (Tomes, 1860) (Rodentia: Cricetidae), with the description of a new species from the Peruvian montane forests

FIGURE 5. Comparisons of selected craniodental characters of, from left to right, Nephelomys ricardopalmai sp. nov., N. albigularis s.s., N. keaysi, and N. levipes. A) Note the interorbital region without ridges in N. ricardopalmai sp. nov., B) note the short and narrow incisive foramina in N. ricardopalmai sp. nov., in other species could be short but not narrow; and also the little swollen nasolacrimal capsule present only in N. ricardopalmai sp. nov. and N. albigularis s.s., C) note the posterolateral palatal pits placed in a fossa and the post palatal process in N. ricardopalmai sp. nov., absent or poorly developed in the other species, D) in a lateral view of the skull, note the low zygomatic plate in N. ricardopalmai sp. nov., E) partial view of the mandible, note the shape of the sigmoid notch and the depth of the coronoid process in N. ricardopalmai sp. nov., and F) the arrow shows an almost complete ventral margin of the external auditory meatus in N. ricardopalmai sp. nov. versus the irregular margin with deep cleavage in N. albigularis s.s. Abbreviations, ab: auditory bulla, ap: angular process, cnp: condylar process, crp: coronoid process, hp: hamular process, if: incisive foramina, nlc: nasolacrimal capsule, palc: posterior opening of the alisphenoid canal, ppf: parapterygoid fossa, ppp: posterolateral palatal pits; sn: sigmoid notch, za: zygomatic arch, zp: zygomatic plate.

FIGURE 7 in A preliminary review of Nephelomys albigularis (Tomes, 1860) (Rodentia: Cricetidae), with the description of a new species from the Peruvian montane forests

FIGURE 7. Scatterplots of the first two principal components (A), and discriminant functions (B) of 19 cranio-dental variables of Nephelomys albigularis (circles), N. ricardopalmai sp. nov. (triangle), N. keaysi (cross), and N. levipes (x). The percentage of variation is shown in parentheses.