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454 results for “Decapods”
FIGURE 4 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 4. MicroCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. The external surface of the crab is translucent to show the position of the preserved internal structures that the scan detected. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. A, dorsal view. B, frontal view. C, right lateral view. D, closeup of dorsal view. E, closeup of frontal view. F, closeup of right lateral view. G, closeup of left lateral view.
FIGURE 3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 3. Exposed gills of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota and an interpretative drawing. 1-4: inferred number of gills;?af: possible afferent vessel.
FIGURE 2. A in Rogueus belgodereae, a new raninoid crab (Crustacea: Brachyura: Raninoidea) from the Upper Palaeocene (Thanetian) of Southern France, with comments on early palaeocene decapod crustacean faunules
FIGURE 2. A, General view of Lafarge quarry, Boussens, municipality of Martres Tolosane, Haute Garonne (France), in the background, the south, with the Pyrenees. B, crab-morphotype 5 in situ, from the upper Thanetian (T4) (star). C, close-up of the extraction front of the "gres à Micraster tercensis" level, before the abandonment and renaturation of the quarry. D, Litoricola macrodactyla (Van Straelen, 1924) in situ. E, G, Rogueus belgodereae sp. nov. in situ. F, crab-morphotype 7 in situ.
FIGURE 4 in Rogueus belgodereae, a new raninoid crab (Crustacea: Brachyura: Raninoidea) from the Upper Palaeocene (Thanetian) of Southern France, with comments on early palaeocene decapod crustacean faunules
FIGURE 4. Faunal composition of the known Palaeocene brachyurans, and its distribution in reefal and nonreefal environments.
FIGURE 1 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 1. Location of study area in South Dakota. A, paleobiogeographic map of most of North America during the Late Cretaceous (late Campanian) with the locality indicated by a red dot (modified from Sampson et al., 2010, figure 1). B, photo of the locality in Pennington County, South Dakota, USA, where the studied crab specimen was discovered. A massive limestone from the upper Campanian Didymoceras cheyennense ammonite Zone is located at the top of the hill on the right and many limestone pieces are found downslope.
FIGURE 2 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 2. The crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. A, carapace in dorsal view. B, closeups of the preserved gills in left branchial chamber. C, carapace in ventral view. D, carapace in frontal view.
FIGURE 3. A-C Rogueus belgodereae n in Rogueus belgodereae, a new raninoid crab (Crustacea: Brachyura: Raninoidea) from the Upper Palaeocene (Thanetian) of Southern France, with comments on early palaeocene decapod crustacean faunules
FIGURE 3. A-C Rogueus belgodereae n.sp, A: holotype MNHN.F.A88045. B, paratype MNHN.F.A88046, C, paratype MNHN.F.A88047. Scale bar equals 1 cm.
FIGURE S3 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE S3. Rotating illustration of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles; purple-pink: possible anterior gastric muscles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973- soft-tissues-in-fossil-crab).
FIGURE 5 in Internal anatomy of a brachyuran crab from a Late Cretaceous methane seep and an overview of internal soft tissues in fossil decapod crustaceans
FIGURE 5. Rotating illustration (spin around the dorsal and ventral sides) of the microCT (µCT) scan results of the crab Secretanella sp. (ALMNH:Paleo:6522) from an upper Campanian methane seep limestone in Pennington County, South Dakota. Blue: cardiac stomach; yellow: esophagus; red: apodemes and mandibles. See online version for rotation (https://palaeo-electronica.org/content/2023/3973-soft-tissues-in-fossil-crab).
Fig. 3 - A in Decapod crustaceans from the late Pliocene (Piacenzian) nearby Faenza (Emilia-Romagna, N Italy)
Fig. 3 - A) Monodaeus bortolottii Delle Cave, 1988, MSF 2234 (x 2.6). B) Goneplax rhomboides (Linnaeus, 1758), MSF 2250 (x 3.4). C) Albaidaplax cf. A. ispalensis Garassino, Pasini & Castro, 2013, MSF 2226 (x 3.2).
Fig. 2 - A in Decapod crustaceans from the late Pliocene (Piacenzian) nearby Faenza (Emilia-Romagna, N Italy)
Fig. 2 - A) Lyreidus cf. L. paronae Crema, 1895, MSF 2240 (x 2). B) Retropluma craverii (Crema, 1895), MSF 2233 (x 2.6).
Fig. 3 - A in The decapod fauna (Axiidea, Anomura, Brachyura) from the Late Pleistocene of Trumbacà, Reggio Calabria (Calabria, southern Italy)
Fig. 3 - A) Pisa armata (Latreille, 1803), MSNM i27880, right chela, outer and inner views (x 3.2). B) Atelecyclus undecimdentatus (Herbst, 1783), MSNM i27879, right chela, outer view (x 3.7). C) Pilumnus hirtellus (Linnaeus, 1761), MSNM i27904, carapace in dorsal view (x 8.5). D) Pilumnus hirtellus (Linnaeus, 1761), MSNM i27912, right chela, outer and inner views (x 7.5). E) Xantho cf. X. incisus (Leach, 1814), MSNM i27908, left chela, outer and inner views (x 4.6).
Fig. 2 - A in The decapod fauna (Axiidea, Anomura, Brachyura) from the Late Pleistocene of Trumbacà, Reggio Calabria (Calabria, southern Italy)
Fig. 2 - A) Ebalia cf. E. deshayesi Lucas, 1846, MSNM i27902, carapace in dorsal view (x 12). B) Ilia nucleus (Linnaeus, 1758), MSNM i27903, carapace in dorsal view (x 6). C) Medorippe lanata (Linnaeus, 1767), MSNM i27884, carapace in dorsal and ventral views (x 2). D) Calappa granulata (Linnaeus, 1758), MSNM i27906, incomplete carapace in dorsal view (x 4.6). E) Calappa granulata (Linnaeus, 1758), MSNM i27893, right chela, outer view (x 2.5).
Text-fig. 5. Free living colonies, showing a mode of preservation which does not allow for precise determination but clearly exhibiting features characteristic for Smittipora and/or Cupuladria and/or Reusirella. (note the clear intrazooecial buds). Specimen deposited in NM Prague under number T 3319. A – imprint, B – counterpart to fig A. C – Specimen deposited in SNM under number Z 37724. Optic photography. Scale bar 1 mm. in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 5. Free living colonies, showing a mode of preservation which does not allow for precise determination but clearly exhibiting features characteristic for Smittipora and/or Cupuladria and/or Reusirella. (note the clear intrazooecial buds). Specimen deposited in NM Prague under number T 3319. A – imprint, B – counterpart to fig A. C – Specimen deposited in SNM under number Z 37724. Optic photography. Scale bar 1 mm.
Text-fig. 4. Reteporella sp., deposited in NM Prague under number T 3318. A – Large colony suggesting very short transport. Scale bar 10 mm. Optic photography. B – the detail of branch showing the mode of preservation (no original skeleton preserved). Scale bar 1 mm. SEM photography (BSE detector). in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 4. Reteporella sp., deposited in NM Prague under number T 3318. A – Large colony suggesting very short transport. Scale bar 10 mm. Optic photography. B – the detail of branch showing the mode of preservation (no original skeleton preserved). Scale bar 1 mm. SEM photography (BSE detector).
Text-fig. 7. rigid erect bryozoans. A – colony perhaps belonging to Metrarabdotos and/or Smittina, deposited in NM Prague under number T 3321. B – erect rigid cyclostomatous bryozoans belonging perhaps to the genus Hornera, deposited in NM Prague under number T 3322. C – colony perhaps belonging to Myriapora, deposited in NM Prague under number T 3323. All photographs were taken under the optic microscope, all scale bars 1 mm. in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 7. rigid erect bryozoans. A – colony perhaps belonging to Metrarabdotos and/or Smittina, deposited in NM Prague under number T 3321. B – erect rigid cyclostomatous bryozoans belonging perhaps to the genus Hornera, deposited in NM Prague under number T 3322. C – colony perhaps belonging to Myriapora, deposited in NM Prague under number T 3323. All photographs were taken under the optic microscope, all scale bars 1 mm.
Text-fig. 6. Lunulites(?), deposited in NM Prague under number T 3320. A – optic (scale bar 1 mm) and B – SEM (BSE detector) photography (scale bar 100 µm) showing characters suggesting determination as Lunulites (square shape and linear arrangement of autozooecia, short cryptocyst and presence of vibracularia). in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 6. Lunulites(?), deposited in NM Prague under number T 3320. A – optic (scale bar 1 mm) and B – SEM (BSE detector) photography (scale bar 100 µm) showing characters suggesting determination as Lunulites (square shape and linear arrangement of autozooecia, short cryptocyst and presence of vibracularia).
Text-fig. 3. Coeloma vigil A. MILNE-EDWARDS. Nearly complete specimens from several different layers. A – layer 15; B – layer 11; C – layer 16. All specimens are deposited at KGP MH. Key: ch=chelipeds; es=eye stalks; p=pereiopods. Scale bar 10 mm. Specimens were covered with ammonium chloride prior to photography. in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 3. Coeloma vigil A. MILNE-EDWARDS. Nearly complete specimens from several different layers. A – layer 15; B – layer 11; C – layer 16. All specimens are deposited at KGP MH. Key: ch=chelipeds; es=eye stalks; p=pereiopods. Scale bar 10 mm. Specimens were covered with ammonium chloride prior to photography.
Fig. 9 in Morphological requirements in limulid and decapod gills: A case study in deducing the function of lamellipedian exopod lamellae
Fig. 9. Conceptual figure showing growth accompanied amplification of pyramidial shaped multi−foliated gills. A. Limulid type of gills with low−relief conical profile. B. Decapod type of gills with high relief.
Fig. 8 in Morphological requirements in limulid and decapod gills: A case study in deducing the function of lamellipedian exopod lamellae
Fig. 8. Body−weight specific lamellar numbers and average single lamellar area in bi−logarithmic coefficients. A. Bi−logarithmic graph of total number of lamellae with respect to dry−body weight in Limulus polyphemus (close circle), Tachypleus rotundicauda (open circle), Callinectes sapidus (solid square) and Libinia dubia (open square). B. Results of allometric analysis shown in Fig. 5A. Sample size (N), correlation coefficient (r), reduced major axis of logW = αlogNL + logβ, and K = α – α / [(s)2 + (s)2]1/2 where s is the standard deviation of α. K is a statistic with the standard normal distribution used for 1 2 α1 α2 α discrimination of the differences of α significant or not. If K>1.96 or K <−1.96, the difference is significant. See also Fig. 7 for the abbreviations of W and NL. C. Bi−logarithmic graph of average area per lamella with respect to dry−body weight. Abbreviations as in Fig. 5A. D. Results of allometric analysis shown in Fig. 5C. Same abbreviations as in Fig. 5B. The data of two decapods are referred to Hughes (1983), which presented average, maximum and minimum specific dry−body weight and lamellar number among the examined samples as well as α and logβ of the allometric analysis with respect to their dry−body weight. Readers are referred to the results of T. rotundicauda as reference data, because too small numbers have been examined. This is to show the trend that the results of a species fall in a neighboring area to that of a taxonomically close species.
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