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Fig. 3 in A low diversity Sinuites gastropod community from the Floian, Early Ordovician, of South Wales

Fig. 3. Sinuitid bellerophontid Sinuites ramseyensis (Hicks, 1873) from the Floian, Lower Ordovician Bolahaul Member of the Ogof Hên Formation, DanlanyCastell quarry, Wales, UK. A. NMW 2017.15G.3, deformed shell in left lateral (A1), posterior oblique (A2), and anterior oblique (A3) views. Note the twisted and compacted median sinus seen as a line in A1 and A3. B. NMW 2017.15G.4, anterolateral shield in right lateral view. C. NMW 2017.15G.5, large, slightly dorsoventrally flattened specimen in left lateral (C1) and dorsal (C2) views, showing median anterior sinus well. D. NMW 2017.15G.6, natural cross section in ventral view, showing the shape of the whorls. E. NMW 2017.15G.7, specimen in left lateral view (E1), showing the external mould of the initial whorls and the internal mould of the last whorl; details of the ornamentation as seen on the external mould (E2). Scale bars 5 mm.

opencc-by-4.0Dec 2019View details →

Fig. 14. The provannid gastropod Provanna antiqua Squires, 1995 in Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru

Fig. 14. The provannid gastropod Provanna antiqua Squires, 1995, from early Oligocene seep deposits at Cerro La Salina (block 1, A, F; block 4, H; block 6, B, C, D, G; block 8, E), Talara Basin, northern Peru. A. NRM Mo187044, specimen with distinctive axial and spiral sculpture, in abapertural view. B. NRM Mo187045, specimen with distinctive sculpture and showing the basal groove, in apertural view. C. NRM Mo187046, specimen with weak axial sculpture in the upper whorl, in apertural view. D. NRM Mo187047, fragmentary specimen with mainly spiral sculpture, in apertural view. E. NRM Mo187048, nearly smooth specimen showing slightly sinuous growth lines, in apertural view. F. NRM Mo187049, specimen with small shoulder and sculpture mainly in upper part of whorls, in apertural view. G. NRM Mo187050, specimen with faint axial and spiral sculpture, in apertural view. H. NRM Mo187051, two specimens with small shoulder and sculpture mainly in upper part of whorls..

opencc-by-4.0Feb 2022View details →

Fig. 3 in Epizoic Anthoathecate Species (Cnidaria, Hydrozoa) Growing on Eroded Shells of Live Gastropods (Nassarius festivus) in Japan

Fig. 3. Hydroid species found on old eroded shells of N. festivus in each collection locality. A. polyps of Dicoryne conybearei (Koajiro); B. gonophores of D. conybearei; C. polyps of Stylactaria misakiensis (Kisarazu); D. gonophores of S. misakiensis; E. polyps of Leuckartiara sp. (Torinosu); F. a medusa of Leuckartiara sp. The yellow arrows indicate the polyps of each hydroid species. Scales=5 mm (A, C, E), 0.5 mm (D, F), 0.1 mm (B).

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Fig. 1 in Epizoic Anthoathecate Species (Cnidaria, Hydrozoa) Growing on Eroded Shells of Live Gastropods (Nassarius festivus) in Japan

Fig. 1. Sampling locations of shells of living Nassarius festivus bearing epizoic hydroid polyps. A. Kisarazu, Chiba Pref. (Stylactaria misakiensis), B. Koajiro, Kanagawa Pref. (Dicoryne conybearei), C. Torinosu, Shirahama, Wakayama Pref. (Leuckartiara sp.), D. Isozaki, Ibaraki Pref. (Koellikerina bouilloni in Namikawa and Kawamura, 2021), E. Takehara, Hiroshima Pref. (Leuckartiara sp. in Kondo et al., 2020).

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Fig. 2 in Epizoic Anthoathecate Species (Cnidaria, Hydrozoa) Growing on Eroded Shells of Live Gastropods (Nassarius festivus) in Japan

Fig. 2. Nassarius festivus collected from Torinosu, Shirahama, Wakayama Pref., showing erosion of older shells. A–B. fresh shells; C–E. old eroded shells. Scale=5 mm.

opencc-by-4.0Mar 2019View details →

Fig. 1 - A in The Norian Worthenia-like gastropods (Main Dolomite, Upper Triassic): reclassification of the specimens housed at the "Antonio Stoppani" Natural Museum, Italy

Fig. 1 - A) Wortheniella pygmaea (Stoppani) AS 41/43, lateral view, showing the pattern of the growth lines, which curve backwards above and below the nodose adapical carina (corresponding to the selenizone). Songavazzo (BG), Norian, Main Dolomite. B) Wortheniella pygmaea (Stoppani) AS 41/43, latero-basal view, showing the very conspicuous threads on the base. C) Wortheniella pygmaea (Stoppani) AS 41/43, apical view of the early whorls of the spire. D) Wortheniella pygmaea (Stoppani) AS 41/43, lateral view of the early whorls of the spire. E) Wortheniella pygmaea (Stoppani) AS 41/43a, lateral view. F) Wortheniella pygmaea (Stoppani) AS 41/43a, latero-basal view, showing the region of the umbilicus, which is largely occupied by a columellar lip.

Fig. 5 in Organismal Responses to Coastal Acidification Informed by Interrelating Erosion, Roundness and Growth of Gastropod Shells.

Fig. 5. Relationships for shell growth rate, shell roundness, and erosion index.. (A) Shell growth rate and roundness measured directly for snails from the secondary population. (B) Shell roundness plotted against erosion index for the primary population. (C) Predicted growth rate plotted against the erosion index. Regression equations and significant differences are given in the Materials and Methods section. Dashed lines represent 95% CI.

Fig. 4 in Organismal Responses to Coastal Acidification Informed by Interrelating Erosion, Roundness and Growth of Gastropod Shells.

Fig. 4. (A–B) Relationships for shell growth rate and shell size based on the secondary data set. (C) Erosion time (ET) as a function of shell size (SL), and (D) comparison of standardized erosion time (SET) between the acidified (EM) and non-acidified (UB) sites using the primary data sets. Dashed lines represent 95% CI. Red symbols indicate snails collected from the acidified site and black symbols from the non-acidified site.

Fig. 3 in Organismal Responses to Coastal Acidification Informed by Interrelating Erosion, Roundness and Growth of Gastropod Shells.

Fig. 3. (A–C) Relationships between total suture length, eroded suture length and shell length for snails from acidified (EM, red) and reference (UBD, black) sites. (D–F) Relationships between erosion index (EI), shell erosion rank (SER), and shell length (SL). Mean values are indicated by large circles. Regression equations and significant differences are given in the Materials and Methods section.

Fig. 1 in Organismal Responses to Coastal Acidification Informed by Interrelating Erosion, Roundness and Growth of Gastropod Shells.

Fig. 1. Methods for determining shell roundness, shell dissolution and growth rate. (A) Shell roundness was assessed from shell width (SW)/ shell length (SL). Shell erosion rank (SER) was scored using eight segments, where moderate erosion (ridges still observed) covered> 50% of the numerically greatest segment. The vertical line through the shell bisects the apical angle. By forming the apical angle we could measure projected SL (the intrinsic responder), as the actual SL is influenced by extrinsic apical dissolution in acidified water. (B) Comparison of SER (upper) and Erosion Index (EI) methods (lower). EI was calculated from the spiral suture length of the eroded shell divided by the total planospiral shell spiral length (R/ (Y and R)) using severe erosion (ridges not observed) determined from apical views (lower images). Upper images show the abapertural surfaces of the same shells, giving their SERs. (C) The growth rate was estimated from the shell margin extension of marked and recaptured snails (n = 22). The marginal extension is shown to far exceed shell length (SL) extension. EA, spire whorl, EB, body whorl, S, shell suture, W1-4, shell whorls.

Fig. 2 in Organismal Responses to Coastal Acidification Informed by Interrelating Erosion, Roundness and Growth of Gastropod Shells.

Fig. 2. (A–C). Comparisons between the localities in shell length, shell width and shell roundness (SW/SL). Data are shown as median, 25–75%, min-max (see key). (D) Relationships between shell width and shell length are: EM (y = -0.55 + 0.686x; r = 0.97; p <0.001) and UB (y = 1.157 + 0.57x; r = 0.93; p <0.001). Red circles indicate the acidified locality (EM) and black circles, the non-acidified locality (UB).

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Fig. 5 in Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

Fig. 5 BEAST phylogenetic tree based on the COI sequences. Node values indicate divergence estimated in MYA

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Fig. 7 in Phylogeography and potential glacial refugia of terrestrial gastropod Faustina faustina (Rossmässler, 1835) (Gastropoda: Eupulmonata: Helicidae) inferred from molecular data and species distribution models

Fig. 7 Areas of climatic stability over time periods from the LGM through the present, based on summed climatic suitability models for the LGM, mid-Holocene, and present day for three differed GCMs. Stability increase from red to yellow color. White-filled areas show the

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FIG. 4 in Shell shape variation of the symbiotic gastropod Phenacovolva rosea (Ovulidae) in Vietnam

FIG. 4. ANOVA tests of width-to-height ratio of P. rosea shells across different host species, vertical bars denote 0,95 confidence intervals. A. In three northern locations (current effect: F(2, 23)=,09015, p=,91411). B. In Nha Trang (F(2, 12)=1,4096, p=,281).

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FIG. 1 in Shell shape variation of the symbiotic gastropod Phenacovolva rosea (Ovulidae) in Vietnam

FIG. 1. Map of studied locations. A. Outline of Vietnam highlighting the two studied regions marked with black boxes. B. Detailed map showing the three northern locations: Cat Ba Island, Quan Lan Island, and Co To. C. Map depicting Nha Trang Bay and its islands.

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РИС. 2. ИЗменчивость формы раковины P. rosea. Слева. ВиЗуалиЗация иЗменчивости формы раковины для каЖдой глав- ной компоненты по отдельности, выполнена в программе PrinPrint пакета SHAPE. Справа. Контрастные варианты формы раковины. Все шесть раковин приведены в стандартной поЗиции устьем вверх, для двух иЗ них приведены фото с дорЗальной стороны, как пример иЗобраЖений испольЗованных в аналиЗе силуЭтов. A. Локация – Ня Чанг, хоЗяин – Echinogorgia sp. 2. B. Ко То, Astrogorgia sp. 2. C. Куан Лан, Astrogorgia sp. 3. D. Ня Чанг, Menella sp. E. Ня Чанг, Bebryce sp. F. Ня Чанг, Paraplexaura sp. in Shell shape variation of the symbiotic gastropod Phenacovolva rosea (Ovulidae) in Vietnam

РИС. 2. ИЗменчивость формы раковины P. rosea. Слева. ВиЗуалиЗация иЗменчивости формы раковины для каЖдой глав- ной компоненты по отдельности, выполнена в программе PrinPrint пакета SHAPE. Справа. Контрастные варианты формы раковины. Все шесть раковин приведены в стандартной поЗиции устьем вверх, для двух иЗ них приведены фото с дорЗальной стороны, как пример иЗобраЖений испольЗованных в аналиЗе силуЭтов. A. Локация – Ня Чанг, хоЗяин – Echinogorgia sp. 2. B. Ко То, Astrogorgia sp. 2. C. Куан Лан, Astrogorgia sp. 3. D. Ня Чанг, Menella sp. E. Ня Чанг, Bebryce sp. F. Ня Чанг, Paraplexaura sp.

Fig. 18 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 18. Frasnian taxonomic composition changes of gastropod associations from the Holy Cross Mountains (after Krawczyński 1998).

Fig.11 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig.11.Distributionoftranslation(H/W)andofaperturalshape(Ha/Wa)indexesof Kowalatrochus sanctacrucensis gen.etsp.nov.fromtheearlytomiddle Frasnian of the upper Sitkówka Beds.

Fig. 10 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 10. Distribution of translation index (Hw/Ww) of Loxoplocus (Donaldiella) karczewskii sp. nov. from the late Frasnian of Panek (set B3).

Fig. 5 in Frasnian gastropod synecology and bio-events in the Dyminy reef complex of the Holy Cross Mountains, Poland

Fig. 5. Grabinopsis guerichi association of the Stachyodes Assemblage from the upper Sitkówka Beds, Grabina, set B, middle Frasnian. A–F. Grabinopsis guerichi gen. et sp. nov. A, B. Apertural views of shells with well visible columellar fold. A. Holotype, GIUS 4−981/Gr−113, × 8. B. GIUS 4−974/Gr−106/1, × 6. C. Apertural view of shell with narrow umbilicus, GIUS 4−984/Gr−112/2, × 7. D. Lateral view of shell. E, F. Lateral and apical views of shell, GIUS 4−978/Gr−110/1, × 8. G, H. Liospira sp., apertural and apical views of shell, GIUS 4−953/Gr−85, × 3. I. Palaeozygopleura (Rhenozyga) sp. A, lateral view of spire, GIUS 4−979/Gr−111/4, × 10. J. Gen. et sp. ex fam. Subulitidae indet., lateral view of shell, GIUS 4−969/Gr−101/2, × 6. K. Murchisonia (Murchisonia) nerinea (Sandberger and Sandberger, 1850–1856), latral view of spire fragment, GIUS 4−969/Gr−101/8, × 5. L. Roemeriella cyclostomoides (Roemer, 1854), lateral view of spire, GIUS 4−982/Gr−114, × 3. M. Palaeozygopleura (Rhenozyga) cf. retrostriata (Kirchner, 1915), lateral view of spire, GIUS 4−974/Gr−106/4, × 6.