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403 results for “clams”
Figure 4. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 4. Lynceus grossipedia n. sp., male, scanning electron microscopy (paratype, NHMD-616086). A. Left lateral view, carapace valve removed. B. Frontal setal fields. C. Left ventrolateral view. D. Left second antenna. E. Head, lateral view. F. Head, anterior view. G. Head, anteroventral view. H. Dorsal organ. I. Telson, dorsal view. J. Telson, ventral view. K. First antennae. L. Left mandible, lateral view. M. Mandible close-up, dorsolateral view. N. Mandible close-up, dorsal view.
Figure 7. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 7. Lynceus grossipedia n. sp., male, scanning electron microscopy of modified thoracopods, broad muscular bases highlighted by coloring (same specimen as on Figs. 4, 6; paratype, NHMD-616086). A. Dorsolateral view of thoracopods, broad muscular bases of thoracopods III–VI colored. B. Modified exopods of thoracopod V and VI. C–H: all of thoracopod VI. C. Thoracopod VI in posterolateral view, note exopod with ~7 knob-shaped processes. D. Thoracopod VI in posterior view with endites, endopod and exopod labelled. E. Exopod, knob-shaped processes and posterior surface with long setae (magnification of D). F. Endopod, broadly lobiform (magnification of D). G. Setae of endopod (magnification of F). Distal part of exopod densely setose.
Figure 1 in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 1. Line drawings of Lynceus grossipedia n. sp., A–G: male, H–M: female. A. Head, anterior view. B. Head, left lateral view. C. Carapace, left lateral view. D. Left clasper, posterior view. E. Right clasper, anterior view. F. Opercular lamella, ventral view. G. Telson, left lateral view. H. Telson, ventral view. I. Telson, dorsal view. J. Head, left lateral view. K. Head, anterior view. L. Carapace, left lateral view. M. Lamina abdominalis, left lateral view. Scale bars 1 mm.
Figure 3. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 3. Lynceus grossipedia n. sp., female, stereo microscopy (allotype, NHMD-616085). A. Right lateral view, intact animal. B. Right lateral view, carapace valve removed. C. Ventral view, carapace valves slightly apart. D. Dorsal view. E. Head close-up (from B). F. Telson close-up (from B). G. Carapace, right valve interior.
Figure 6. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 6. Lynceus grossipedia n. sp., male, scanning electron microscopy of claspers (same specimen as on Figs. 4, 7; paratype, NHMD-616086). A. Right clasper, anterior view. B. Left clasper, posterior view. C. Movable finger (endopod), large palp (endite 5), and gripping area (part of palm, endite 3), left clasper, apical view. D. Movable finger with band of minute setae, gripping area with type 4 setae, left clasper. E. Small palp (endite 4) and large palp (endite 5), right clasper. F. Palm with scales (encircled area in B), lateral view, right clasper. G. Setation on movable finger (endopod). H. Setation on posterior side of gripping area. I. Magnification of scales on clasper palm.
Figure 2. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 2. Lynceus grossipedia n. sp., male, stereo microscopy (holotype, NHMD-615874). A. Left lateral view, intact animal. B. Left lateral view, carapace valve removed. C. Ventral view, carapace valves apart. D. Dorsal view, carapace valves slightly apart. E. Head close-up (from B). F. Left side thoracopods, showing enlarged muscular bases. G. Carapace, left valve interior.
Figure 5. Lynceus grossipedia n in A new Northeast Asian Lynceus (Crustacea: Branchiopoda: Laevicaudata) with uniquely modified thoracopods and an evaluation of DNA barcoding for clam shrimp species identification
Figure 5. Lynceus grossipedia n. sp., female, scanning electron microscopy (paratype, NHMD-616086). A. Left lateral view, carapace valve removed. B. Frontal setal fields. C. Left ventrolateral view. D. Left second antenna. E. Head, lateral view. F. Head, anterior view. G. Head, anteroventral view. H. Dorsal organ. I. Telson and lamina abdominalis, dorsolateral view. J. Egg-carrying exopods of thoracopods IX and X. K. Distal part of right first antenna. L. Serration of rostral distal margin, lateral view (gap at edge likely due to drying artifact). M. Left mandible, lateral view. N. Left mandible, dorsal view. O. Mandible close-up (from N).
Figure 2. Neodendrina carnelia igen. et isp. n in Large dendrinids meet giant clam: the bioerosion trace fossil Neodendrina carnelia igen. et isp. n. in a Tridacna shell from Pleistocene-Holocene coral reef deposits, Red Sea, Egypt
Figure 2. Neodendrina carnelia igen. et isp. n. on the inner side of a Tridacna maxima bivalve shell from the Pleistocene–Holocene coral reef deposits in the Marsa Alam area, Red Sea, Egypt. (a) Inner side of valve (left; prior to sectioning) with hundreds of N. carnelia specimens, and outer surface (right) intensely bioeroded by the sponge boring Entobia isp. (b) Section of the valve (MB.W 5640) with the holotype (centre) and the paratypes (all other specimens) in various ichnogenetic stages. (c) Close-up of the holotype trace. (d–e) Respective micro-CT scan of the holotype in plan and angular views as seen from inside the substrate.
Figure 1 in Large dendrinids meet giant clam: the bioerosion trace fossil Neodendrina carnelia igen. et isp. n. in a Tridacna shell from Pleistocene-Holocene coral reef deposits, Red Sea, Egypt
Figure 1. The Pleistocene raised coral reef limestones exposed at the type locality of Neodendrina carnelia igen. et isp. n. just south of the Carnelia Beach Resort, located between El Quseir and Marsa Alam, exhibiting scleractinian corals as primary reef builders (a) and giant clams Tridacna spp. weathering from the carbonate–siliciclastic rocks (b) that mix with Holocene and modern Tridacna valves, forming a highly time-averaged assemblage (c).
Figure 4. Neodendrina carnelia igen. et isp. n in Large dendrinids meet giant clam: the bioerosion trace fossil Neodendrina carnelia igen. et isp. n. in a Tridacna shell from Pleistocene-Holocene coral reef deposits, Red Sea, Egypt
Figure 4. Neodendrina carnelia igen. et isp. n. on the outer surface of a large recent Tridacna squamosa valve from Nosy-BØ, northern Madagascar (ZMB/Mol 102671). (a) Shell surface with various encrusters as well as bioerosion traces. (b) Close-up of a cluster of N. carnelia. (c) A large specimen with distinct pitted arrays developed in most of the branches.
Figure 3 in Large dendrinids meet giant clam: the bioerosion trace fossil Neodendrina carnelia igen. et isp. n. in a Tridacna shell from Pleistocene-Holocene coral reef deposits, Red Sea, Egypt
Figure 3. SEM images (BSE detector) of Neodendrina carnelia igen. et isp. n. of the inner side of a Tridacna maxima bivalve shell from the Pleistocene–Holocene coral reef deposits in the Marsa Alam area, Red Sea, Egypt. (a–c) Overview and close-ups of the holotype. (d–e) Overview and close-up of an early ichnogenetic stage. (f–g) Overview and close-up of a specimen with authigenic gypsum crystals, calcite spar, and clay minerals within the boring as well as on the host's shell surface. (h) Different morphologies possibly developed in the trace, comprising deep open canals (1), isolated deep pits (2), shallow open canals (3), pits in shallow canals (4) and discontinuities (5). (i) Cross section of a trace showing deep (1) and shallow (2) open canals. (j–k) Overview and detail of an epoxy resin cast of a specimen, illustrating the smooth surface texture and the high degree of microbioerosion in the surrounding (partly mechanically removed to gain a view of the dendrinid).
Fig. 8 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 8 Transmcsscon electron mccroscops of Mikrocytos donaxi n. sp. cnfectcng Donax trunculus mantle collected cn Audcerne Bas. a Dense form of the parascte wcth a vers granulous cstoplasm and the presence of few large vesccles cnscde (arrow); note the eccentrcc posctcon of the nucleus. b Parascte cn tcght contact wcth two mctochondrca cnduccng a depresscon of the parascte membrane (arrow). c Parascte cn the connectcve tcssue at an endosomal stage, presentcng a well-developed anastomoscng endoplasmcc retcculum near the nucleus. Abbreviations: aER, anastomoscng endoplasmcc retcculum; M, mctochondrca; N, nucleus. Scale-bars: a, c, 1 μm; b, 0.5 μm
Fig. 4 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 4 Hcstologccal sectcon of Donax trunculus mantle showcng hsbrcdczatcon of the Mikrocytos Msp probe wcth mccrocell cells (arrows). Scale-bar: 20 μm
Fig. 3 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 3 Hcstologccal haematoxslcn eoscn tcssue sectcons showcng mantle lescons of Donax trunculus cnfected wcth Mikrocytos donaxi n. sp. parasctes from Audcerne Bas. a Dcffuse necroscs of muscular fcbres (arrows) and connectcve tcssue (arrowheads) of the mantle cnfected wcth mccrocell parasctes b Degenerated haemocstes (arrows) and muscular cell necroscs (arrowhead) assoccated wcth mccrocell parasctes (astercsks). c Mikrocytos donaxi n. sp. cnscde a msocste (arrow). Scale-bars: a, 100 μm; b, c, 20 μm
Fig. 2 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 2 Hcstologccal haematoxslcn eoscn tcssue sectcons showcng Mikrocytos veneroïdes n. sp. parasctes cn dcfferent tcssues of Donax trunculus from Oléron Island. a Parasctes cn the adductor muscle. Note the extracellular (arrows) or cntracellular (arrowhead) posctcon of mccrocell parasctes. b Parascte cell (arrows) cn the neuronal ganglcon. c Two parasctes (arrow) cnscde the cstoplasm of a haemocste. Scale-bars: 20 μm
Fig. 1 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 1 Samplcng sctes of Donax trunculus, mortalcts rate estcmatcon and collected cndcvcduals along the Atlantcc coast of France. Abbreviations: AB, Audcerne Bas; DB, Douarnenez Bas; QB, Qucberon Bas; OI, Oléron Island
Fig. 5 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 5 Phslogenetcc tree (50% majorcts-rule consensus) uscng Basescan Inference (MrBases 3.1.2) based on the small subunct rcbosomal gene of Mikrocytos. Numbers at the nodes are Basescan postercor probabclctces. Paramikrocytos canceri was used as the outgroup for Mikrocytos spp. based on the results of Hartckacnen et al. [5]. Astercsks cndccate sequences obtacned cn thcs studs
Fig. 6 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 6 Phslogenetcc tree (50% majorcts-rule consensus) uscng Basescan Inference (MrBases 3.1.2) based on the ITS1-5.8S-ITS2 sequence arras of Mikrocytos. Numbers at the nodes are Basescan postercor probabclctces. Astercsks cndccate sequences obtacned cn thcs studs
Fig. 7 in Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Fig. 7 Transmcsscon electron mccroscops of Mikrocytos veneroïdes n. sp. cnfectcng Donax trunculus mantle collected cn Qucberon Bas. a Parascte cnscde a msocste and near the msofcbrcls. Note the presence of mctochondrca near the parascte cells (arrow). b Parascte cn the cstoplasm of a haemocste; note the presence of parasctophorous vacuole around the parascte (arrows). c Parascte near the msofcbrcls. Mctochondrca tcght agacnst the surface of the parascte or cnscde the parascte cstoplasm; note the depresscon of parascte surface at the pocnt of contact wcth mctochondrca. d Bcnucleate stage of the parascte cn an extracellular posctcon; note the presence of the two nuclec. Abbreviations: M, mctochondrca; MF, msofcbrcls; N, nucleus; P, parascte. Scale-bars: a, b, d, 2 μm; c, 1 μm
Рис. 3. Фотографии Laternula elliptica, сделанные около cтанции «Прогресс», ВосточнаЯ Антарктида. L. elliptica на морском дне с медкими камнЯми или гравием, глубина 27 м (А); несколько сифональных отверстий L. elliptica над поверхностью мЯгких осадков вокруг голотурии Staurocucumis turqueti, глубина 27 м (В); раковина L. elliptica (длина около 110 мм) на снегу около майны сраЗу после иЗвлечениЯ иЗ воды (С); пустые раковины L. elliptica на морском дне, глубина 56 м (D); раковина L. elliptica (вид с дорсального краЯ) на мЯгких осадках с камнЯми, покрытыми иЗвестковыми водорослЯми, глубина 30 м (Е); пара сифональных отверстий L. elliptica на поверхности мЯгких осадков, глубина 27 м (F). Фотографии О. Савинкина (A, B, D–F) и В. Потина (С). Fig. 3. Photographs of Laternula elliptica taken near «Progress» Research Station (East Antarctica). Softshelled clam L. elliptica on sea bottom with small stowns or gravel, depth 27 m (A); several open siphons of L. elliptica above soft bottom sediments around holothurian Staurocucumis turqueti, depth 27 m (B); a shell of L. elliptica (length about 110 mm) on snow near a dive hole just after dragging out of water (C); empty shells of L. elliptica on seafloor, depth 56 m (D); a shell of Laternula elliptica (dorsal view) on soft deposits among stones, covering by Lithothamnion, depth 30 m (E); pair of siphonal opening of L. elliptica on surface of soft sediments, depth 27 m (F). Photographs are taken by O. Savinkin (A, B, D–F) and V. Potin (C). in Species of warm-water origin Laternula elliptica (King, 1832) (Mollusca: Bivalvia: Laternulidae), a widespread mollusk in recent Antarctica
Рис. 3. Фотографии Laternula elliptica, сделанные около cтанции «Прогресс», ВосточнаЯ Антарктида. L. elliptica на морском дне с медкими камнЯми или гравием, глубина 27 м (А); несколько сифональных отверстий L. elliptica над поверхностью мЯгких осадков вокруг голотурии Staurocucumis turqueti, глубина 27 м (В); раковина L. elliptica (длина около 110 мм) на снегу около майны сраЗу после иЗвлечениЯ иЗ воды (С); пустые раковины L. elliptica на морском дне, глубина 56 м (D); раковина L. elliptica (вид с дорсального краЯ) на мЯгких осадках с камнЯми, покрытыми иЗвестковыми водорослЯми, глубина 30 м (Е); пара сифональных отверстий L. elliptica на поверхности мЯгких осадков, глубина 27 м (F). Фотографии О. Савинкина (A, B, D–F) и В. Потина (С). Fig. 3. Photographs of Laternula elliptica taken near «Progress» Research Station (East Antarctica). Softshelled clam L. elliptica on sea bottom with small stowns or gravel, depth 27 m (A); several open siphons of L. elliptica above soft bottom sediments around holothurian Staurocucumis turqueti, depth 27 m (B); a shell of L. elliptica (length about 110 mm) on snow near a dive hole just after dragging out of water (C); empty shells of L. elliptica on seafloor, depth 56 m (D); a shell of Laternula elliptica (dorsal view) on soft deposits among stones, covering by Lithothamnion, depth 30 m (E); pair of siphonal opening of L. elliptica on surface of soft sediments, depth 27 m (F). Photographs are taken by O. Savinkin (A, B, D–F) and V. Potin (C).
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