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150 results for “Dasyatidae”
Fig. 4 in Revision Of Anteropora (Cestoda: Lecanicephalidea) And Descriptions Of Five New Species From Stingrays (Myliobatiformes: Dasyatidae) In Borneo
Fig. 4. Scanning electron micrographs of Anteropora glandapiculis, new species. A, whole worm; B, scolex (small letters indicate location of details in C–G); C, surface of apical modification of scolex proper; D, surface of scolex proper at base of apical modification; E, distal bothridial surface; F, proximal bothridial surface; G, surfaces at boundary between adjacent proglottids.
Fig. 3 in Revision Of Anteropora (Cestoda: Lecanicephalidea) And Descriptions Of Five New Species From Stingrays (Myliobatiformes: Dasyatidae) In Borneo
Fig. 3. Line drawings of Anteropora species. A–C, A. glandapiculis, new species. A, whole worm, paratype (USNPC 106524); B, scolex, paratype (USNPC 106522); C, terminal proglottid, holotype (MZUM[P] 2013.4[H]). D–F, A. patulobothridium, new species. D, whole worm, holotype (MZBCa 181); E, scolex, paratype (USNPC 106531); F, terminal proglottid, paratype (USNPC 106532).
Fig. 2 in Revision Of Anteropora (Cestoda: Lecanicephalidea) And Descriptions Of Five New Species From Stingrays (Myliobatiformes: Dasyatidae) In Borneo
Fig. 2. Scanning electron micrographs of Anteropora species. A–F, A. joannae, new species. A, scolex (small letters indicate location of details in B–F); B, surface of apical modification of scolex proper; C, surface of scolex proper at base of apical modification; D, distal bothridial surface; E, proximal bothridial surface; F, surface of posterior margin of proglottid. G–K, A. cuba, new species. G, scolex (small letters indicate location of details in H–K); H, surfaces of apical modification of scolex proper; I, distal bothridial surface; J, proximal bothridial surface; K, surface of posterior margin of proglottid.
Fig. 1 in Revision Of Anteropora (Cestoda: Lecanicephalidea) And Descriptions Of Five New Species From Stingrays (Myliobatiformes: Dasyatidae) In Borneo
Fig. 1. Line drawings of Anteropora species. A–C, A. joannae, new species. A, whole worm, holotype (MZUM[P] 2013.7[H]); B, scolex, paratype (USNPC 106528); C, terminal proglottid, paratype (USNPC 106528). D–F, A. cuba, new species. D, whole worm, holotype (MZUM[P] 2013.1[H]); E, scolex, paratype (USNPC 106521); F, subterminal proglottid, paratype (USNPC 106521).
FIGURE 3 in A new species of whiptail stingray of the genus Dasyatis Rafinesque, 1810 from the Southwestern Atlantic Ocean (Chondrichthyes: Myliobatiformes: Dasyatidae)
FIGURE 3: Dasyatis colarensis n. sp., UERJ 2006, paratype, male, 530 DW. Dorsal view.
FIGURES 1–3 in Three new species of Acanthobothrium Blanchard, 1848 (Cestoda: Onchoproteocephalidea) in Stingrays (Dasyatidae) from the Pacific coast in Mexico
FIGURES 1–3. Light microscope photographs of entire worms of the three new species (Holotypes). 1. Acanthobothrium ppdeleoni n. sp. (CNHE–11253); 2. Acanthobothrium hypanus n. sp. (CNHE–11255); 3. Acanthobothrium sinaloaensis n. sp. (CNHE–11257). Scale bars: 1, 2 and 3 = 500 μm.
FIGURE 6 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 6. Type locality (★) of Hemitrygon yemenensis sp. nov. in eastern Yemen on the Arabian peninsula. Other locations that Wilhelm and Marie Hein visited on the 1901-1902 South Arabian expedition are indicated (●).
FIGURE 4 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 4. Scapular region of Hemitrygon yemenensis sp. nov. (NMW 60783, adult male holotype 223 mm DW), showing stellate denticles (top), medial thorns (centre) and scapular thorns (left and right).
FIGURE 1 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 1. Hemitrygon yemenensis sp. nov., adult male holotype (NMW 60783, 223 mm DW, preserved): A. dorsal surface; B. ventral surface.
FIGURE 2 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 2. Hemitrygon yemenensis sp. nov., female paratype (NMW 99841, 206 mm DW, preserved): A. dorsal surface; B. ventral surface.
FIGURE 5 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 5. Lateral view of tail near base of Hemitrygon yemenensis sp. nov., (NMW 99841, female paratype, 206 mm DW) with its emergent tail thorns.
FIGURE 3 in Hemitrygon yemenensis sp. nov., a new species of stingray (Myliobatoidea Dasyatidae) from the northwestern Indian Ocean
FIGURE 3. Oronasal region of Hemitrygon yemenensis sp. nov., A. Adult male holotype (NMW 60783, 223 mm DW). B. female paratype (NMW 99841, 206 mm DW).
Data from: Population structure and male-biased dispersal in the short-tail stingray Bathytoshia brevicaudata (Myliobatoidei: Dasyatidae)
Selective pressures driving dispersal in vagile species often differ between males and females, resulting in sex-biased dispersal. Male-biased dispersal is common in mammals, where there is greater reproductive investment by females, and there is emerging evidence for a similar pattern in elasmobranchs. We examine the population structure of the short-tail stingray (Bathytoshia brevicaudata), a large, viviparous coastal species common in southern hemisphere waters. Using 11 nuclear (nDNA) microsatellite markers from 202 individuals in comparison to mitochondrial (mtDNA) data reported by Le Port and Lavery (J Hered 103:174–185, 2012), we elucidate patterns of dispersal at both southern hemisphere and New Zealand scales. At a global scale, estimates of population differentiation were comparable across marker types (microsatellite FST = 0.148, p < 0.001, mtDNA ϕST = 0.67, p < 0.001). In contrast, New Zealand structure was much weaker for microsatellite markers (FST = 0.0026, p > 0.05) than for mtDNA (ϕST = 0.054, p < 0.05). Female-only data displayed a greater degree of population differentiation from both nDNA and mtDNA compared to male-only data, and population assignment tests indicated that males were significantly more likely to be immigrants to the population from which they were sampled. We estimate that within New Zealand, male-mediated gene flow is at least fivefold greater than female-mediated gene flow. This molecular evidence for sex-biased dispersal in a batoid species adds further support to male-biased dispersal as a recurrent pattern in viviparous elasmobranchs. Many elasmobranch species are vulnerable to extinction, and understanding movement patterns is crucial to management of threatened populations.
FIGURE 6 in A new species of whiptail stingray of the genus Dasyatis Rafinesque, 1810 from the Southwestern Atlantic Ocean (Chondrichthyes: Myliobatiformes: Dasyatidae)
FIGURE 6: Dasyatis colarensis n. sp. Schematic drawing of the right clasper of holotype in dorsal view. Abbreviations: mts, medial terminal margin serrae; hyp, hypopyle; pe, pent.
FIGURE 5 in A new species of whiptail stingray of the genus Dasyatis Rafinesque, 1810 from the Southwestern Atlantic Ocean (Chondrichthyes: Myliobatiformes: Dasyatidae)
FIGURE 5: Dasyatis colarensis n. sp., UERJ 2006, paratype. Detail of mouth showing the coloration of the lower lip margin.
FIGURES 1–2. Dasyatis colarensis n in A new species of whiptail stingray of the genus Dasyatis Rafinesque, 1810 from the Southwestern Atlantic Ocean (Chondrichthyes: Myliobatiformes: Dasyatidae)
FIGURES 1–2. Dasyatis colarensis n. sp, MNRJ 25179, holotype, male, 630 DW. 1, dorsal view; 2, ventral view.
FIGURE 10. Dendromonocotyle colorni. A. Male reproductive system. B in Overview of South African Dendromonocotyle (Monogenea: Monocotylidae), with descriptions of 2 new species from stingrays (Dasyatidae) kept in public aquaria
FIGURE 10. Dendromonocotyle colorni. A. Male reproductive system. B. Distal portion of male copulatory organ showing sclerotised accessory flange (af). C. Female reproductive system; note translucent coiled duct (tcd) of vagina. Scale bars = 100μm.
FIGURE 9. Dendromonocotyle colorni. A. Hamulus. B in Overview of South African Dendromonocotyle (Monogenea: Monocotylidae), with descriptions of 2 new species from stingrays (Dasyatidae) kept in public aquaria
FIGURE 9. Dendromonocotyle colorni. A. Hamulus. B. Haptoral papilla showing papillary sclerites (ps) and terminal papillary sclerite (tps). C. Tripartite sclerite (otp) at junction of radial septum and outer-ring septum; papillary sclerites (ps) can also be seen. D. Terminal papillary sclerite (tps). E. Anterior end showing distinct anterolateral gland duct openings (alg). Scale bars: A = 10μm; B = 100μm; C = 50μm; D = 20μm; E = 200μm.
FIGURE 8. Dendromonocotyle colorni. A in Overview of South African Dendromonocotyle (Monogenea: Monocotylidae), with descriptions of 2 new species from stingrays (Dasyatidae) kept in public aquaria
FIGURE 8. Dendromonocotyle colorni. A. Ventral view body-proper, composite. B. Haptor including hamulus (ham). C. Outer ring septal sclerite. D. Septal sclerites. E. Inner-ring tripartite sclerite. F. Outer-ring tripartite sclerite. G. Papillary sclerites. H. Terminal papillary sclerites. I. Hamulus. J. Marginal hooklet. Scale bars: A, B = 500μm; C–J = 10μm.
FIGURE 7. Dendromonocotyle ukuthena n in Overview of South African Dendromonocotyle (Monogenea: Monocotylidae), with descriptions of 2 new species from stingrays (Dasyatidae) kept in public aquaria
FIGURE 7. Dendromonocotyle ukuthena n. sp. egg and oncomiracidium. A. Single egg with club-shaped filament. B. Egg with forming oncomiracidium; note eyespot (es) development. C. Egg with fully embryonated oncomiracidium. D. Hatching oncomiracidium. E. Oncomiracidium: F. Refringent droplets in ciliated epithelial cells. Abbreviations: ab, anterior band of ciliated cells; cl, crystalline lens; hb, haptoral band of ciliated cells; mp, median patch of ciliated cells; p, pharynx; pb, pigmented band. Scale bars = 30μm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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