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280 results for “ontogenetic development”
Fig. 1 in Ontogenetic development of tetra Astyanax lacustris (Characiformes: Characidae)
Fig. 1. Development of Astyanax lacustris during the yolk-sac larval stage: a. newly hatched larva, with adhesive gland (A), eyes with little pigmentation (B), the optic vesicle (C), and no anal opening (D); b. increased pigmentation of the eye (E), increased pigmentation of the yolk reserves (F), and button of the pectoral fin (G); c. mouth in ventral position (H), further development of the optic vesicle (I), and pigmentation of the heart (J); d. pigmented eyes (K) and swim bladder (L).
Fig. 4 in Ontogenetic development of tetra Astyanax lacustris (Characiformes: Characidae)
Fig. 4. Specimens of Astyanax lacustris in the postflexion stage: a. presence of food in the digestive tract (A); b. teeth (B); c. punctate pigmentation on the dorsal region of the head (C); and d. scales (D).
Fig. 6 in Ontogenetic development of tetra Astyanax lacustris (Characiformes: Characidae)
Fig. 6. Total length (mm) of Astyanax lacustris during its larval development. Arrows indicate the total consumption time of yolk reserves.
Figure 9 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 9. Holotype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0001), habitus in ventrolateral view and surrounding objects in the resin, volume rendering image, two different transfer functions and clipping planes applied, orange colour transfer function solely depicts extremely low-x-ray contrast areas (gas phase). ab, air bubble; l, leg, Euarthropoda.
Figure 10 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 10. Graphical summary of all known manca-stage or larval fossils of Isopoda, reconstruction line drawings, free pleon tergites (postocular segments 14–18) in darker grey. A. Paratype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0002); B: Aquitanoscia chiapasensis Broly et al., 2017; C: Vacuotheca dupeorum Schädel et al., 2019b; D: IHNFG-4951-Ep1 ('specimen 2') Serrano Sanchez et al. (2016); E: openstreetmap.org IHNFG-4964-Ep2 ('specimen 5b') Serrano Sanchez et al. (2016); F: IHNFG-5321-Ep1 ('specimen 6') Serrano Sanchez et al. (2016); G: IHNFG-4971-Ep1 ('specimen 3') Serrano Sanchez et al. (2016); H: IHNFG-4939-Ep1 ('specimen 1') Serrano Sanchez et al. (2016).
Figure 8 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 8. Comparison of the distal part of trunk appendage 1 in different lineages of Cymothoida. A: Electrolana madelineae n. sp., schematic reconstruction; B: Cirolana australiense Hale, 1925, redrawn from Bruce (1986, fig. 114L); C: Elthusa vulgaris (Stimpson, 1857), drawn after van der Wal and Haug (2020, fig. 16B). d, dactylus, dc, claws of dactylus, pp, propodus.
Figure 7 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 7. Comparison of the uropod morphology between Electrolana madelineae sp. nov. and an extant representative of Oniscidea. A: Holotype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0001), pleon region in latero-dorsal view, epifluorescence microscopy, 4x (BZ); B: Philoscia cf. muscorum (Scopoli, 1763), posterior pleon region in dorsal view, white light microscopy, 200x (VHX). pl, pleon segments 1–5; pr7, trunk segment 7; pt, pleotelson; ub, uropod basipod; un, uropod endopod; ux, uropod exopod.
Figure 5 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 5: Holotype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0001), volume rendering images based on micro-CT data. A: Habitus in dorsal view, orthographic projection; B: habitus in ventral view, orthographic projection; C: habitus in ventral view, red-cyan stereo anaglyph, perspective projection; D: habitus in lateral view, right body side, red-cyan stereo anaglyph, perspective projection. a, antenna; al, antennula; cp7, coxal plate of trunk segment 7; p1–6, trunk appendages 1–6; pt, pleotelson; un, uropod endopod; ux, uropod exopod;?, unknown material forming an irregular bubble.
Figure 4 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 4. Holotype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0001). A: Habitus in dorsal view, white light microscopy, 200x (VHX). B: anterior head region in ventro-lateral view, transmitted light microscopy, 4x (BZ); C: anterior body region in ventro-lateral view, white light microscopy, 200x (VHX); D: anterior trunk region in ventro-lateral view, white light microscopy, 150x (VHX); E: head region in dorsal view, left body side, white light microscopy, 200x (VHX). a, antenna; al, antennula; ce, compound eye; cp6–7, coxal plate of trunk segment 6–7;mp, mandibular palp; o, seed shrimp (Ostracoda); p1–7, trunk appendages 1–7; pt, pleotelson; ub, uropod basipod; un, uropod endopod; ux, uropod exopod.
Figure 1. A in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 1. A: Map of Myanmar, white star marks the location of the Burmese amber mining sites near the town Noje Bum, base map from OpenStreetMap (openstreetmap.org); B: palaeogeographic world map, Aitov projection, 100 million years in the past, base image from PALEOMAP project (Scotese, 2016), red star marks the location of the Burmese amber sites.
Figure 3 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 3. Paratype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0002). A: Habitus in ventral view, white light microscopy, 300x (VHX); B: habitus in ventral view, red-cyan stereo anaglyph, white light microscopy, 200x; C: habitus in ventral view, epifluorescence microscopy, 4x (BZ); D: distal region of trunk appendages 1 and 2 in ventral view, right body side, white light microscopy, 300x (VHX); E: head in ventral view, white light microscopy, desaturated with colour markings, red mandible, blue maxillula, yellow maxilla, green maxilliped, 300x (VHX); F: pleon region in ventral view, white light microscopy, 300x (VHX); G: pleon region in ventral view, white light microscopy, desaturated and inverted, with color markings, yellow basipod, green endopod, blue exopod, 300x (VHX). a, antenna; al, antennula; cl, clypeus; dc, dorsal claw; ed, endite of the maxilliped; fl, frontal lamina; lb, labrum; mp, mandibular palp; mxp, maxilliped; p1–6, trunk appendages 1–6; plp1–5, pleopod 1–5; pt, pleotelson; sr, serration pattern; u, uropod.
Figure 2 in Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar
Figure 2. Paratype of Electrolana madelineae sp. nov. (NHMW 2017/0052/0002). A: Habitus in dorsal view, white light microscopy, coaxial light and polarising filter, 300x (VHX); B: habitus in dorsal view, red-cyan stereo anaglyph, white light microscopy, 200x (VHX); C: head region in antero-dorsal view, white light microscopy, 200x (VHX); D: head region in antero-dorsal view, red-cyan stereo anaglyph, white light microscopy, 200x (VHX). a, antenna; al, antennula; ce, compound eye; cp6, coxal plate of trunk segment 6; p3–6, trunk appendages 3–6; pl, pleon segments 1–5; plp5, pleopod 5; pr1–7, trunk segments 1–7; pt, pleotelson; u, uropod.
Fig. 12 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 12 Mixosaurus cornalianus, skull roof elements. Interpretative drawings are identified by an apostrophe beside their corresponding letter. A Right-skull roof complex of fetus PIMUZ T 4830 in ventral (internal) view; B left-skull roof complex of juvenile PIMUZ T 4857 in dorsal view; C partial skull roof complex of juvenile PIMUZ T 2134; D skull roof of adult specimen PIMUZ T 2414 in dorsolateral view; E isolated parietal of small? juvenile PIMUZ T 2134 in dorsal view, numbers denote possible anterior margins of the parietal foramen. co ossification centre, epif epipterygoid facet, fr frontal, inv invagination, la lacrimal, na nasal, nac nasal capsule, ocf occipital flange, oli indentation for the olfactory lobe, opi indentation for the optic lobe, pa parietal, paf parietal facet, pde posterodorsal edge supratemporal, pf parietal foramen, pmax premaxilla, prf prefrontal, po postorbital, pof postfrontal, qj quadratojugal, qf quadrate facet, sq squamosal, sqf squamosal facet, st supratemporal, str supratemporal ramus, tfa anterior terrace upper temporal fenestra. Scale bar equals 10 mm
Fig. 13 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 13 Mixosaurus cornalianus (A-E) and Stenopterygius quadriscissus (F) palatal elements. Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Pterygoid of fetus PIMUZ T 4830 in dorsal view; B pterygoid of juvenile specimen PIMUZ T 2416 in dorsal view; C vomer of fetus PIMUZ T 4830 in medial view; D vomer of juvenile specimen PIMUZ T 2416 in medial(?) view; E vomer of fetus PIMUZ T 4830 in medial view; F vomer of stage 3 fetus SMNS 80234 in medial view. avof antimeric vomer facet, bsf basisphenoid facet; co, ossification centre, dr. dorsal ramus, lw lateral wing, pmp posteromedial process, psf/vof parasphenoid and vomer facet, qr quadrate ramus, voc vomer crest. Scale bar equals 5 mm
Fig. 10 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 10 Mixosaurus cornalianus, isolated and disarticulated jugals and postorbitals. Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Isolated jugal of fetus PIMUZ T 4830 in lateral? view; B disarticulated jugal of juvenile PIMUZ T 0077 in lateral view; C disarticulated jugal of juvenile specimen PIMUZ T 2416 in lateral? view; D semi-articulated jugal of adult MSNM BES SC 1001 in lateral view; E isolated postorbital of fetal specimen PIMUZ T 4830 in lateral view; F isolated postorbital of juvenile specimen PIMUZ T 2416 in lateral view. cd central depression, juf jugal facet, maxf maxilla facet, pof postorbital facet, poff postfrontal facet, stf supratemporal facet. Scale bar equals 5 mm
Fig. 9 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 9 Mixosaurus cornalianus, maxillae. Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Fetus PIMUZ T 4830 in medial(?) view; B fetus PIMUZ T 4830 in medial view; C juvenile specimen PIMUZ T 0077 in medial view; D juvenile specimen PIMUZ T 2416 in medial view; E adult MSNM BES SC 1001 in lateral view; F adult GPIT PV 76274 in ventral view. al alveolus, ar anterior ramus, ardp anterior ramus dorsal process, co ossification centre, dmp dorso-medial platform, dr dorsal ramus, en external naris, jr jugal ramus, la lacrimal, max maxilla, na nasal, nuf nutritive foramen, pmax premaxilla, prf prefrontal, t tooth, tr tooth row. Scale bar equals 5 mm
Fig. 5 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 5 Mixosaurus cornalianus, quadrates and quadratojugals. Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Isolated left quadrate of fetus PIMUZ T 4830 in lateral view; B semi-articulated left quadrate and quadratojugal (latter mostly hidden) of juvenile PIMUZ T 0077 in lateral view; C isolated left quadrate of juvenile specimen PIMUZ T 2416 in lateral view; D isolated right quadrate of juvenile specimen PIMUZ T 2416 in medial view; E isolated right quadratojugal of juvenile specimen PIMUZ T 2416 in medial view; F isolated right quadratojugal of a juvenile MSNM BES SC 1903 in lateral view; G isolated right quadratojugal of adult specimen PIMUZ T 2420 in lateral view. as articular surface, ol occipital lamella, ptf pterygoid flange, qf quadrate facet, suf surangular facet. Scale bar equals 5 mm
Fig. 7 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 7 Mixosaurus cornalianus, isolated hyoid elements. Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Hyoid corpus of adult specimen PIMUZ T 2414 in ventral view; B ceratobranchial (CB1) element of adult specimen PIMUZ T 2414 in medial? view; C hyoid corpus of juvenile specimen PIMUZ T 2416 in ventral view; D ceratobranchial (CB1) element of juvenile specimen PIMUZ T 2416 in medial? view. amd anteromedian depression, cbf ceratobranchial facet, hcf hyoid corpus facet. Scale bar equals 5 mm
Fig. 4 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 4 Mixosaurus cornalianus, supraoccipitals in anterior (A) and posterior (B) view; stapes (C, D) and exoccipitals (E–H) in posterior view and Stenopterygius quadriscissus exoccipital in anterior view (I). Interpretative drawings are identified by an apostrophe beside the corresponding letter. A Juvenile specimen PIMUZ T 2416; B adult specimen MSNM BES SC 1001; C juvenile specimen PIMUZ T 0077; D stapes in posterior view of adult specimen PIMUZ T 2414; E fetal specimen PIMUZ T 4830; F juvenile specimen PIMUZ T 4857; G juvenile specimen PIMUZ T 2416; H adult specimen PIMUZ T 2414; I exoccipital in anterior view of a stage 3 fetus Stenopterygius quadriscissus SMNS 80234. amf bof anteromedial footplate of the basioccipital facet, bof basioccipital facet, cbli indentation for the cerebellum, fm foramen magnum, hyf hypoglossal foramen, nuf nutritive foramen, plf bof posterolateral footplate of the basioccipital facet, quf quadrate facet, sof supraoccipital facet, ssc semicircular canal indentation. Scale bar equals 3 mm
Fig. 3 in Ontogenetic variation in the cranium of Mixosaurus cornalianus, with implications for the evolution of ichthyosaurian cranial development
Fig. 3 Mixosaurus cornalianus, anterior cervical vertebrae and otic capsule. Interpretive drawings are identified by an apostrophe alongside the corresponding letter. A Anterior cervical series in lateral view of adult specimen PIMUZ T 2420; B axis neural arch in lateral view of adult specimen PIMUZ T 4848, originally interpreted as two elements of otic capsule; C opisthotic in posterior view of adult specimen PIMUZ T 2414; D opisthotic in posterior view of adult specimen MSNM BES SC 1001. E prootic(?) of adult? specimen PIMUZ T 2415. atna atlas neural arch, atns atlas neural spine, axna axis neural arch, axns axis neural spine, bof basioccipital facet; cr3, cervical 3 neural arch; c3n, cervical 3 neural spine, hsc indentation for the horizontal semicircular canal, opi opisthotic, pop paroccipital process, pro prootic, pvsc process made by the indentation for the vertical semicircular canal, sa/ut indentation for the sacculus and/or the utriculus, stf supratemporal facet, vsc indentation for the vertical semicircular canal. Scale bar equals 5 mm
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