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222 results for “head morphology”
Figure 1 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 1 Geographical distribution of Phrynocephalus mystaceus and locations of the sites where the samples that were examined in the molecular analyses of the present study were obtained. Locality numbers correspond to those given in Table 1. Dot in the center of a circle indicates the type locality; type localities for taxa are shown as follows: A Lacerta mystacea Pallas, 1776 B Megalochilus mystaceus dagestanica Ananjeva, "1986" 1987 C Phrynocephalus mystaceus aurantiacocaudatus Semenov & Shenbrot, 1990 D Phrynocephalus mystaceus galli Krassowsky, 1932; and E Ph. mystaceus khorasanus ssp. n.
Figure 2 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 2 BI-inferred dendrogram that illustrates the phylogenetic relationships of the Phrynocephalus mystaceus species complex based on the analysis of 654 b. p. fragment of COI gene (mtDNA). Numbers at the tree nodes show Bayesian Posterior Probabilities/ Maximum Likelihood Bootstrap Support. Only PP values higher than 0.90 and BS values higher than 75% are shown. COI sequence of Trapelus sanguinolentus is used as an outgroup.
Figure 11 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 11 ZMMU R-6412, holotype of Phrynocepahlus mystaceus aurantiacocaudatus Semenov & Shenbrot, 1990 in preservative: A dorsal view B ventral view C head in dorsal view D head in frontal view E head in lateral view F right foot in thenar view (photographs by E. N. Solovyeva).
Figure 9 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 9 Typical habitat of Ph. mystaceus khorasanus ssp. n. at the type locality in the vicinity of Gonabad, Khorasan Razavi Province, Iran (photo by R. A. Nazarov).
Figure 10 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 10 ZMMU R-6413, lectotype of Phrynocepahlus mystaceus galli Krassowsky, 1932 in preservative: A dorsal view B ventral view C head in dorsal view D head in frontal view E head in lateral view F left foot in thenar view (photographs by E. N. Solovyeva).
Figure 4 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 4 Statistically significant morphological differences between Ph. mystaceus khorasanus ssp. from Iran and other Ph. mystaceus: A the number of subdigital lamellae on the toe III (SLIII) B the number of subdigital lamellae on the toe IV (SLIV) C the total number of supralabial scales (SL) D the relative length of the dark distal part of the tail to the total tail length (TL-black/TL) E number of flat infralabials anterior to the angular enlarged spine-like infralabial scales (IlbA).
Figure 8 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 8 Paratypes of Ph. mystaceus khorasanus ssp. n. in preservative: A in dorsal view B in ventral view (photographs by E. N. Solovyeva).
Figure 7 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 7 Holotype of Ph. mystaceus khorasanus ssp. n. in preservative: A dorsal view B ventral view C head in dorsal view D head in frontal view E head in lateral view; F right foot in thenar view (photographs by E. N. Solovyeva).
Figure 3 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 3 Statistically significant morphological differences between Ph. mystaceus khorasanus ssp. from Iran and other subspecies of Ph. mystaceus: A the number of subdigital lamellae on the toe IV (SLIV) B the number of enlarged triangular scales on the lateral fringe of the toe III (FrIII) C the total number of supralabial scales (SL) D the relative length of the dark distal part of the tail to the total tail length (TL-black/TL).
Figure 6 from: Solovyeva EN, Dunayev EN, Nazarov RA, Radjabizadeh M, Poyarkov Jr NA (2018) Molecular and morphological differentiation of Secret Toad-headed agama, Phrynocephalus mystaceus, with the description of a new subspecies from Iran (Reptilia, Agamidae). ZooKeys 748: 97-129. https://doi.org/10.3897/zookeys.748.20507
Figure 6 Ph. mystaceus in life: A subadult Ph. mystaceus khorasanus ssp. n., orange lower surface of the tail is shown, Iran (photograph by R. A. Nazarov) B Ph. mystaceus khorasanus ssp. n., female, Iran (photo by R. A. Nazarov) C Ph. m. mystaceus, Russia, Astrakhan region, Dosang (photograph by E. A. Dunayev) D Ph. m. mystaceus, Dagestan, Sarykum sands (photograph by E. A. Dunayev) E Ph. m. mystaceus, Uzbekistan, Qarakalpaqiston (corresponds to the previously recognized subspecies "galli"; photograph by E. A. Dunayev) F Ph. m. mystaceus, Dagestan, Sarykum sands (corresponds to the previously recognized subspecies "dagestanica"; photograph by E. A. Dunayev) G Ph. m. aurantiacocaudatus, E Kazakhstan, SE Balkash Lake (photograph by E. N. Solovyeva) H Ph. m. aurantiacocaudatus, E Kazakhstan, SE Balkash lake (photograph by E. N. Solovyeva) I Ph. m. mystaceus, Russia, Astrakhan region, Dosang (photograph by E. A. Dunayev).
Fig. 1 in Head morphology of Osmylus fulvicephalus (Osmylidae, Neuroptera) and its phylogenetic implications
Fig. 1 Osmylus fulvicephalus, habitus
Linked collectors and determiners for: The morphological diversity of Mymaridae (Hymenoptera): an atlas of scanning electron micrographs. Part 1. General overview and structure of the head.
Natural history specimen data linked to collectors and determiners held within, "The morphological diversity of Mymaridae (Hymenoptera): an atlas of scanning electron micrographs. Part 1. General overview and structure of the head". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/1d5719a4-b5f9-46ff-8d27-4010f0eed663">https://bionomia.net/dataset/1d5719a4-b5f9-46ff-8d27-4010f0eed663</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/1d5719a4-b5f9-46ff-8d27-4010f0eed663">https://gbif.org/dataset/1d5719a4-b5f9-46ff-8d27-4010f0eed663</a>. Formatted as a Frictionless Data package.
Data from: Sperm head morphology is associated with sperm swimming speed: a comparative study of songbirds using electron microscopy
Sperm exhibit extraordinary levels of morphological diversification across the animal kingdom. In songbirds, sperm have a helically shaped head incorporating a distinct acrosomal membrane or 'helical keel', the form and extent of which varies across species. The functional significance of this helical shape, however, remains unknown. Using scanning electron microscopy, we quantified inter- and intra-specific variation in sperm head morphology across 36 songbird species (Passeriformes: Passerida). Using phylogenetic comparative methods, we investigated the relationship between sperm head morphology and both sperm swimming speed and the frequency of extra-pair young (EPY). We found that species whose sperm had a relatively more pronounced helical form (i.e. long acrosome, short nucleus, wide helical membrane, and a more pronounced waveform along the sperm head 'core') had faster-swimming sperm. We found no evidence of a relationship between inter-specific variation in sperm head morphology and EPY, although we did find that among- and within-male variation in sperm head traits were negatively correlated with EPY. Applying principles of fluid mechanics, we discuss how the helical form of the sperm head may influence swimming speed, and suggest that further studies considering aspects of sperm morphology beyond sperm length are needed to improve our understanding of sperm structure-function relationships.
Morphology of the limb, shell, and head explain the variation in performance and ecology across 14 turtle taxa (12 species)
<p>Because morphology directly influences an organism's ability to utilize its habitat and dietary resources, it also influences fitness. Comparing the relationship between morphology, performance, and ecology is fundamental to understand how organisms evolve to occupy a wide range of habitats and diets. In turtles, studies have documented important relationships between morphology, performance, and ecology, but none were field based or considered limb, shell, and head morphology simultaneously. We compare morphology, performance, and ecology of 14 turtle taxa (12 species) in Mexico that range in their affinity to water and in their diet. We took linear measurements of limb, shell, and head variables, measured maximum swimming speed, maximum bite force, how often turtles were encountered on land, and used stable isotopes to assess trophic position. We use these data to test three hypotheses. The first, that morphology, performance, and ecology covary. The second, that limb and shell variables, like hand length, correlate to swim speed and the percent time spent on land. The third, was that that head variables, like head width, correlate to bite force and stable isotopes. We find support for these hypotheses and provide the first evidence that morphology influences performance and ecology in turtles in the field.</p>
Figure 6. Left mandible EES plots. A, axis 2 in Termite soldier defence strategies: a reassessment of Prestwich's classification and an examination of the evolution of defence morphology using extended eigenshape analyses of head morphology
Figure 6. Left mandible EES plots. A, axis 2 vs. axis 1. B, axis 2 vs. axis 3. C, modelled mode of mandible shape change along axes 1, 2 and 3.
Figure 7. Right mandible EES plots. A, axis 2 in Termite soldier defence strategies: a reassessment of Prestwich's classification and an examination of the evolution of defence morphology using extended eigenshape analyses of head morphology
Figure 7. Right mandible EES plots. A, axis 2 vs. axis 1. B, axis 2 vs. axis 3. C, modelled mode of mandible shape change along axes 1, 2 and 3
Figure 8. Labrum EES plots. A, axis 2 in Termite soldier defence strategies: a reassessment of Prestwich's classification and an examination of the evolution of defence morphology using extended eigenshape analyses of head morphology
Figure 8. Labrum EES plots. A, axis 2 vs. axis 1. B, axis 2 vs. axis 3. C, modelled mode of labrum shape change along axes 1, 2 and 3.
FIGURES F53–F58 in The morphological diversity of Mymaridae (Hymenoptera): an atlas of scanning electron micrographs. Part 1. General overview and structure of the head
FIGURES F53–F58. Mymaridae mouthparts, ventral.
FIGURES F32–F37 in The morphological diversity of Mymaridae (Hymenoptera): an atlas of scanning electron micrographs. Part 1. General overview and structure of the head
FIGURES F32–F37. Mymaridae mouthparts, ventral.
FIGURES F59–F65 in The morphological diversity of Mymaridae (Hymenoptera): an atlas of scanning electron micrographs. Part 1. General overview and structure of the head
FIGURES F59–F65. Mymaridae mouthparts, ventral.
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