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1,253 results for “Gulf of Mexico”
Fig. 8 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 8. Comparation between some species of Phalacrostemma Marenzeller, 1895. A. Holotype vial of P. paulinae Kirtley, 1994. B–D. Outer palea of P. paulinae. B. Proximal region. C. Middle region. D. Middistal region. E. Nuchal hook of P. danieli sp. nov. F. Nuchal hook of P. tenera (Augener, 1918). G–I. Outer palea of P. danieli sp. nov. G. Proximal region. H. Middle region. I. Mid-distal region. J. Abdominal uncini of P. danieli sp. nov. K. Abdominal uncini of P. tenera. L. Middle region of outer palea of P. gwendolynae Kirtley, 1994. M–N. Middle region of outer palea of P. gloriaae Kirtley, 1994. Abbreviations: Ld = limbo distance; Ta = tip angle; Td = tip distance. Numbers indicate the rows of teeth. A, Photo taken by Sergio Salazar-Vallejo; B–D, L–N, modified from Kirtley (1994); F, K, from Augener (1918).
Fig. 7 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 7. Phalacrostemma danieli sp. nov., paratype (UMML-22.1181). A. Right opercular lobe. B. Nuchal hooks. C–D. Basal region of outer palea. E. Middle region and tip of outer paleae. F. Middle-distal region of outer palea. G. Inner paleae. Abbreviations: nh = nuchal hooks; op = outer paleae; pa = palps; tip = outer palea tip. Arrows indicate inner paleae. Scale bars: A = 200 µm; B–C = 100 µm; D = 20 µm; E, G = 50 µm; F = 10 µm.
Fig. 4 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 4. Mariansabellaria caribbea sp. nov., holotype (ECOSUR-303). A. Outer palea dorsal. B. Basal region of dorsal outer palea. C. Middle region of dorsal outer palea. D. Details of the outer palea tip. E. Basal region of ventral outer palea. F. Dorsal inner palea. G. Ventral inner palea. H. Details of the inner palea tip. I. Parathoracic chaeta. J–K. Abdominal chaetae. L. Abdominal uncini. Numbers indicate the rows of teeth. Scale bars: A = 200 µm; B, D, H–I, K = 20 µm; C, L = 10 µm; E = 50 µm; F–G, J = 100 µm.
Fig. 6 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 6. Phalacrostemma danieli sp. nov., holotype (UMML-22.1179). A. Outer palea. B. Proximal region outer palea. C. Middle region of outer palea. D. Middle-distal region of outer palea. E. Tip of outer palea. F. Inner palea. G. Tip of inner palea. H. Nuchal hook. I. Parathoracic notochaetae. J. Abdominal parapodium. K. Uncini. Abbreviation: Li = limbation. Numbers indicate the rows of teeth. Scale bars: A, F, H–I = 100 µm; B–E, G = 20 µm; J = 200 µm; K = 10 µm.
Fig. 20 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 20. Tetreres oscari sp. nov., holotype (UMML-22.1197). A. Complete specimen, dorsal view. B. Anterior region, dorsal view. C. Anterior region, lateral right view. D. Anterior region, ventral view. E. Last abdominal segments. F. Opercular crown, upper view. Abbreviations: c2 = cirri 2nd thoracic segment; ip = inner paleae; mo = median organ; nh = nuchal hooks; opa = opercular papillae; op = outer paleae. Numbers indicate the tentacular filaments. Arrows indicate gametes. Scale bars: A = 1 mm; B–D = 0.5 mm; E–F = 0.2 mm.
Fig. 3 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 3. Mariansabellaria caribbea sp. nov., holotype (ECOSUR-303). A. Complete specimen, dorsal view. B. Anterior region left lateral view. C. Anterior region ventral view. D. Nuchal spines. E. Parathorax left lateral view. F. Caudal peduncle. Abbreviations: bo = building organ; c1 = cirrus 1st thoracic; c2 = cirri 2nd thoracic segment; ne = parathoracic neuropodium; no = parathoracic notopodium. Numbers indicate the tentacular filaments. Scale bars: A–B, E: 1 mm; C, F: 0.5 mm; D: 200 µm.
Fig. 2 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 2. Lygdamis pechi sp. nov., holotype (ECOSUR-302). A. Opercular paleae.B. Outer paleae.C. Detail of the outer paleae tips. D. Inner palea. E. Parathoracic notochaetae. F. Parathoracic neurochaetae. G. Abdominal uncini. Abbreviations: op = outer paleae; ip = inner paleae. Numbers indicate the rows of teeth. Scale bars: A–B = 100 µm; C = 20 µm; D–F = 50 µm; G = 10 µm.
Fig. 13. Phalacrostemma perkinsi Kirtley, 1994 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 13. Phalacrostemma perkinsi Kirtley, 1994 (UMML-22.1191). A. Anterior region, dorsal view. B. Operculum, dorsal view. C. Anterior region, ventral view. D. Operculum, ventral view. E. Anterior region, lateral view. F. Another specimen (UMML-22.1192). Abbreviations: bf = buccal flaps; c1 = cirri 1st thoracic segment; c2 = cirri 2nd thoracic segment; nh = nuchal hooks; op = outer paleae; opa = opercular papillae; pa = palps. Numbers indicate the cirri. Scale bars: A, C = 1 mm; B, D–F = 0.5 mm.
Fig. 1 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 1. Lygdamis pechi sp. nov., holotype (ECOSUR-302). A. Complete specimen, dorsal view. B–C. Anterior region, dorsal view. D. Median ridge and median organ, ventral view. E. Thorax and parathoracic region, ventral view.F. Posterior region, dorsal view. Abbreviations: c1t = cirrus 1st thoracic segment; mo = median organ; mr = median ridge; ne = parathoracic neuropodium; nh = nuchal hooks; no = parathoracic notopod; opa = opercular papillae; pa = palps; tf = tentacular filament. Scale bars: A = 0.5 mm; B–F = 200 µm.
Fig. 19 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 19. Tetreres israeli sp. nov., holotype (UMML-22.1195). A. Outer palea. B. Tip of outer palea. C. Inner palea. D. Tip of inner palea. E. Nuchal hook, ventral view. F. Nuchal hook, lateral view. G. Abdominal parapodium. H. Abdominal chaetae. Abbreviation = Li, limbation. Scale bars: A, E = 200 µm; B, D, G = 100 µm; C = 1 mm; F = 0.5 mm; H = 30 µm.
Fig. 5 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 5. Phalacrostemma danieli sp. nov., holotype (UMML-22.1179). A. Complete body, dorsal view. B. Complete body, ventral view. C. Anterior region, lateral view. D. Anterior region, ventral view. E. Caudal peduncle. F. Nuchal hooks. Abbreviations: bf = buccal flaps; bo = building organ; ca = caudal peduncle; c1 = cirri 1st thoracic segment; c2 = cirri 2nd thoracic segment; mo = mouth; nh = nuchal hooks; ne = neuropodium; op = outer paleae; opa = opercular papillae; pa = palps. Numbers indicate the cirri. Scale bars: A–B = 1 mm, C–E = 0.5 mm; F = 200 µm.
Fig. 17 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 17. Phalacrostemma sp. (UMML-22.1194). A. Complete outer palea. B. Distal region of outer palea. C. Middle region of outer palea. D. Tip of outer palea. E. Inner palea. F. Tip of inner palea. G. Nuchal hook. H. Parathoracic notochaetae. I. Abdominal chaetae. J. Uncini. Abbreviation: Li = limbation. The arrows indicate capillary chaetae. Numbers indicate the rows of teeth. Scale bars: A, I = 200 µm; B = 50 µm; C, E = 100 µm; D, F–H = 20 µm; J = 10 µm.
Fig. 12 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 12. Comparation between opercular paleae of Phalacrostemma dorothyae Kirtley, 1994. A–D. Holotype of P. dorothyae. A. Tip of outer palea. B. Middle region of outer palea. C. Proximal region of outer palea. D. Thecae of inner palea. E–H. P. dorothyae, this work (UMML-22.1184). E. Tip of outer palea. F. Middle region of outer palea. G. Proximal region of outer paleae. H. Thecae of inner palea. A–D, modified from Kirtley (1994).
Fig. 9. Phalacrostemma dorothyae Kirtley, 1994 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 9. Phalacrostemma dorothyae Kirtley, 1994 (UMML-22.1183). A. Complete specimen, lateral view. B. Anterior region, dorsal view. C. Anterior region, lateral view. D. Anterior region, ventral view. E. Opercular crown, upper view. F. Opercular crown of another specimen (UMML-22.1183), upper view. Abbreviations: bf = buccal flaps; bo = building organ; br = branchiae; ca = caudal peduncle; c1 = cirri 1st thoracic segment; c2 = cirri 2nd thoracic segment; ip = inner paleae; m = mount; mo = median organ; nh = nuchal hooks; op = outer paleae; opa = opercular papillae; pa = palps. Scale bars: A = 1 mm; B–F = 0.2 mm.
Fig. 22. Localities for studied specimens. A in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 22. Localities for studied specimens. A. Caribbean Sea and the Gulf of Mexico. B. South Florida. C. Southeastern Bahamas. The crosses indicate type localities of species previously recorded in the tropical Western Atlantic.
Fig. 16 in New species of sabellariids (Annelida: Sabellariidae) from the Caribbean Sea and the Gulf of Mexico
Fig. 16. Phalacrostemma sp. (UMML-22.1194). A. Complete specimen, dorsal view. B. Anterior region, dorsal view. C. Complete specimen, ventral view. D. Anterior region, ventral view. E. Complete specimen, lateral right view. F. Anterior region, lateral view. Abbreviations: bo = building organ; br = branchia; c1 = cirri 1st thoracic segment; c2 = cirri 2nd thoracic segment; m = mount; mo = median organ; nh = nuchal hooks; op = outer paleae; opa = opercular papillae. Numbers indicate the cirri. Scale bars: A, C, E = 1 mm; B, D, F = 0.5 mm.
Data From: Population-specific responses in eastern oysters exposed to low salinity in the northern Gulf of Mexico
<p>Eastern oysters, <em>Crassostrea virginica</em>, are facing rapid environmental changes in the northern Gulf of Mexico and can respond to these changes via plasticity or evolution. Plastic responses can immediately buffer against environmental changes, although this buffering may impact the organism's ability to evolve in subsequent generations. While plasticity and evolution are not mutually exclusive, the relative contribution and interaction between them remain unclear. In this study, we investigate the roles of plastic and evolved responses to low salinity in <em>C. virginica</em> using a common garden experiment with four populations exposed to two salinities. We use three transcriptomic analyses (edgeR, PERMANOVA, and WGCNA) combined with physiology data to identify the effect of genotype (population), environment (salinity), and genotype-by-environment interaction on both whole organism and molecular phenotypes. We demonstrate that variation in gene expression is mainly driven by population, with relatively small changes in response to salinity. In contrast, the morphology and physiology data reveal that salinity has a larger influence on oyster performance than the population of origin. All analyses lacked signatures of genotype-by-environment interaction, and in contrast to previous studies, we find no evidence for population-specific responses to low salinity. However, individuals from the highest salinity estuary displayed highly divergent gene expression from other populations, which could potentially drive population-specific responses to other stressors. Our findings suggest that C. virginica largely rely on plasticity in physiology to buffer the effects of low salinity, but that these changes in physiology do not rely on large persistent changes in gene expression.</p>
FIGURE 6. SHSU 1-235 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 6. SHSU 1-235, mandibular symphysis with partial left dentary ramus in dorsal (A), ventral (B), and anterior (C) views. The shallow dorsoventral depth and low, rounded ventrally projecting boss (arrow) are diagnostic features of the extinct morphotype Trichechus manatus bakerorum. Scale bar equals 2 cm.
FIGURE 5. SHSU 1-231 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 5. SHSU 1-231, edentulous right anterior maxilla fragment in dorsal (A) and ventral (B) views. Note the resorbed anterior alveolar region typical of manatees. The rubber band was not removed because it was considered to be part of the history of the specimen. Scale bar equals 2 cm.
FIGURE 4. SHSU 1-027 in First fossil manatees in Texas, USA: Trichechus manatus bakerorum from Pleistocene beach deposits along the Gulf of Mexico
FIGURE 4. SHSU 1-027, edentulous left dentary in lingual (A) and labial (B) views. Scale bar equals 2 cm.
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Allen Brain Atlas
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