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171 results for “shell morphology”
FIGURE 1 in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 1. Morphological characters of shell. A. Left valve. B. Right valve. Abbreviations: P-1, prodissoconch-1; P-2, prodissoconch-2; AA, anterior auricle; AC, active ctenolium; ADP, connection point of auricle with disc; α, angle; BF, byssal fasciole; BN, byssal notch; BS, byssal sinus; EHP extreme point of the hinge; FMA, free margin of auricle; IR, inter-rib space; PriS, prismatic stage; N, Nepioconch; PN, Post-nepioconch; PA, posterior auricle; R, rib; S, scale.
FIGURE 4. Zygochlamys patagonica. A. Left valve. B. Right valve. C in Description of the early shell morphology of three species of Pectinidae (Mollusca: Bivalvia) from Argentina
FIGURE 4. Zygochlamys patagonica. A. Left valve. B. Right valve. C. Post-nepioconch of LV. D. Anterior auricle and byssal notch. E. Microsculpture of Nepioconch of LV. F. Prodissoconch. Scale bars: A= 500 µm; B= 500 µm; C= 200 µm; D= 200 µm; E=100 µm; F=100 µm. All specimens from Fracasso Beach (42.39754S, 64.19199W), Chubut Province, Argentina (CNP-INV 4086).
FIGURE 14 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 14. Habitat of Dipolydora vietnamita sp. nov. (in life). A–C, worm burrows in a shell of the date mussel Lithophaga sp. which, in turn, have perforated the shell of an oyster. Arrow showing pygidium of a worm inside burrow. Scale bar: A–C = 1 mm.
FIGURE 12 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 12. Dipolydora vietnamita sp. nov. morphometric relationships. A, caruncle length and anterior position of gizzardlike structure versus total number of chaetigers. B, last branchiate chaetiger versus total number of chaetigers. Correlation coefficients (r) and their significance are reported in Table 1.
FIGURE 11 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 11. Morphology of Dipolydora vietnamita sp. nov. (formalin-fixed paratypes stained with methylene green). A, anterior end, dorsal view, showing unusual pattern of MG staning on anterior chaetigers. B, chaetigers 3–12, ventral view, showing transverse bands of MG staining on chaetigers 6–11. C, middle chaetigers, dorsal view. D, E, posterior end in left lateral (D) and rear (E) view. F, general dorsal view, showing common absence of MG staining on dorsal side of anterior chaetigers. G, anterior fragment, left lateral view, showing MG staining on peristomium, ventral side of chaetigers 6–11, and of glandular pouches in lateral side from chaetiger 12 onwards. H, chaetiger 5, right side in ventral view. Abbreviations: ch5, ch11 = chaetigers 5, 11; co = bilimbate companion chaetae; fa = heavy falcate spines; su = dorsal superior capillaries; ve = ventral capillaries. Scale bars: A–E = 100 µm; F, G = 200 µm, H = 20 µm. A, B, E, G, H—MIMB 42724; C, F—MIMB 42728; D—MIMB 42723.
FIGURE 10 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 10. Morphology of Dipolydora spinosa sp. nov. (formalin-fixed paratypes stained with methylene green). A, middle part of body from chaetiger 14 onwards, dorsal view, showing beginning of dorsal staining from chaetiger 15. B, middle chaetigers, dorsal view. C, anterior end, ventral view, showing stained transverse bands on chaetigers 7–13. D, anterior end, dorsal view (head in frontal view), showing MG staining of foregut. E, middle female chaetigers, dorsal view, showing dorsal terminal parts of nephridia. Abbreviations: ch5, ch15 = chaetigers 5, 15; ne = nephridium. Scale bars: A–E = 100 µm. A, C, E—MIMB 42714; B, D—MIMB 42719.
FIGURE 7 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 7. Morphology of Dipolydora spinosa sp. nov. A–D, anterior ends: A, left lateral view; B, D, ventral view; C, dorsal view. E–G, posterior ends: E, left lateral view; F, dorsal view; G, dorso-lateral view. H, notopodia of posterior chaetigers with capillary chaetae and awl-like spines. Abbreviation: an = occipital antenna, ch5 = chaetiger 5. Scale bars: A–D = 300 µm; E–G = 200 µm; H = 50 µm. A–F—holotype MIMB 42721, in life; G, H—paratype MIMB 42720, in life.
FIGURE 6 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 6. Dipolydora spinosa sp. nov. morphometric relationships. A, caruncle length and anterior position of gizzard-like structure versus total number of chaetigers. B, last branchiate chaetiger and anterior position of notopodial awl-like spines versus total number of chaetigers. Correlation coefficients (r) and their significance are reported in Table 1.
FIGURE 5 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 5. Morphology of Dipolydora spinosa sp. nov. (in life). A, B, anterior end, dorsal view. C, middle chaetigers, dorsal view, showing gizzard-like structure. D, gizzard-like structure, dorsal view, showing grain-like structures in the wall. Abbreviation: ch5 = chaetiger 5; gi = gizzard-lile structure. Scale bars: A–C = 200 µm; D = 50 µm. A, C, D—41-chaetiger individual; B—70-chaetiger individual. A–D—MIMB 42719.
FIGURE 3 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 3. Morphology of Dipolydora echinata sp. nov. (formalin-fixed holotype MIMB 42702 stained with methylene green). A, posterior end, dorsal view. B, notopodia of posterior chaetiger with thin protruding capillary chaetae and thick embedded awl-like spines. C, pygidium, dorsal view. Scale bars: A–C = 50 µm.
FIGURE 8 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 8. Morphology of Dipolydora spinosa sp. nov. A–F, chaetiger 5 chaetae: A, C, bilimbate companion chaetae; B, D, falcate spines in lateral view; E, ventral capillary chaeta; F, dorsal superior geniculate capillary chaeta. G, H, neurochaetae from chaetiger 7: G, inferior winged capillary chaeta; H, bidentate hooded hook. I, J, neurochaetae from a posterior most chaetiger: I, inferior hair-like capillary chaeta; J, bidentate hooded hook. K, L, notochaetae from a posterior most chaetiger: K, three awl-like spines with basal part blunt; L, capillary chaeta. M, octad of spermatids (one below is not visible). Scale bars: A–J, K, L = 20 µm; M = 5 µm. A–J—MIMB 42714; K–M—MIMB 42715.
FIGURE 2 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 2. Morphology of Dipolydora echinata sp. nov. A, anterior end, dorsal view. B–H, chaetiger 5 chaetae: B, D, bilimbate companion chaetae; C, E, F, falcate spines in lateral view (C, F) and in rear view (E); G, ventral capillary chaeta; H, dorsal superior geniculate capillary chaeta. I, J, neurochaetae from chaetiger 7: I, inferior winged capillary chaeta; J, bidentate hooded hook. K, L, neurochaetae from a posterior most chaetiger: K, inferior hair-like capillary chaeta; L, bidentate hooded hook. M–O, notochaetae from a posterior most chaetiger: M, partially developed awl-like spine with basal part blunt; N, fully developed awl-like spine with basal part pointed; O, capillary chaeta. P, tetrad of spermatids. Scale bars: A = 100 µm; B–O = 20 µm; P = 5 µm. A–P—MIMB 42701.
FIGURE 9 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 9. Morphology and reproduction of Dipolydora spinosa sp. nov. (in life). A, complete female, left lateral view, palps missing. B, anterior end, dorsal view, palps missing. C, a part of a brood laid by female inside its burrow in the shell, showing egg capsules joined in a string and containing trochophores. D, trochophores and abortive eggs from the capsules shown on C. Abbreviations: ab = abortive eggs; mo = mouth. Scale bars: A = 500 µm; B, C = 300 µm; D = 30 µm. A, B—paratype MIMB 42720; C, D—egg capsules deposited by holotype MIMB 42721.
FIGURE 1 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 1. Maps showing sampling locations in the Gulf of Thailand and South China Sea (A) and Nha Trang Bay (B).
FIGURE 4 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 4. Morphology of Dipolydora spinosa sp. nov. (formalin-fixed 41-chaetiger paratype MIMB 42719 stained with methylene green). A, anterior end, dorsal view. B, chaetigers 10–20, dorsal view, showing remains of larval pigmentation and pattern of MG staining. Abbreviations: ch10, ch20 = chaetigers 10 and 20; dl = dorso-lateral melanophores; do = dorsal paired melanophores; la = lateral melanophores; me = median vesiculate melanophores. Scale bars: A, B = 50 µm.
FIGURE 13 in Three new species of shell-boring Dipolydora (Annelida: Spionidae: Polydorini) from the South China Sea and the Gulf of Thailand, Vietnam, with comments on the modified spines in posterior notopodia and sperm morphology in polydorins
FIGURE 13. Morphology of Dipolydora vietnamita sp. nov. A–F, chaetiger 5 chaetae: A, C, bilimbate companion chaetae; B, D, falcate spines in lateral view; E, ventral capillary chaeta; F, dorsal superior geniculate capillary chaeta. G, H, neurochaetae from chaetiger 7: G, inferior winged capillary chaeta; H, bidentate hooded hook. I, J, neurochaetae from a posterior most chaetiger: I, inferior hair-like capillary chaeta; J, bidentate hooded hook. K, tetrad of spermatids. Scale bars: A–J = 20 µm; K = 5 µm. A–K—MIMB 42724.
Comparative shell morphology of the rare land snails Levantina ninivita and Levantina escheriana (Gastropoda: Helicidae) in south-eastern Türkiye (Table for measurements)
<div>Title:</div> <div>Comparative Shell Morphology of the Rare Land Snails Levantina ninivita and Levantina escheriana (Gastropoda: Helicidae) in South-Eastern Türkiye</div> <div> </div> <div>Description:</div> <div>This study presents a comparative analysis of the shell morphology of the rare land snails Levantina ninivita and Levantina escheriana (Gastropoda: Helicidae) in south-eastern Türkiye. The dataset includes detailed measurements of shell dimensions for both species, specifically focusing on shell height (shh), shell width (shw), aperture height (aph), aperture width (apw), spire height (sph), and body whorl height (bwh). </div>
Fig. 4 in Systematics and phylogenetic species delimitation within Polinices s.l. (Caenogastropoda: Naticidae) based on molecular data and shell morphology
Fig. 4 NeighborNet network based on the concatenated data set (COI, 16S, 18S, 28S, H3). Bootstrap values are indicated
Fig. 7 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 7 Variation in shell shape (a) and size (b) between water body types. notches extend to ± 1.58 times the IQR divided by the root squared The boxplots show the median (middle line), quartiles (boxes), 1.5 times number of observations, overlapping notches being strong evidence that the interquartile range (IQR) (whiskers), extreme values (dots). The the two medians do not differ (Chambers et al. 1983)
Fig. 5 in Ecomorphology of a generalist freshwater gastropod: complex relations of shell morphology, habitat, and fecundity
Fig. 5 Distribution of genetic clusters based on single nucleotide polymorphism markers. Lines indicate color ranges of clusters; lines representing clusters 5, 7, and 15 point at specific sites. Clusters 8, 9, and 10 were widespread across the northwest of the South island and therefore were not mapped
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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