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114 results for “Helicoidea”
FIGURE 4. Shells. A in Anatomy and function of the penial twin papillae system of the Helicinae (Gastropoda: Helicoidea: Helicidae) and description of two new, small Hemicycla species from the laurel forest of the Canary Islands
FIGURE 4. Shells. A. Hemicycla laurijona sp. nov., holotype. B. Hemicycla laurijona sp. nov., paratypes from Puntas Coloradas, La Gomera. C. Hemicycla perraudierei, from Las Casillas, El Hierro.
FIGURE 3. A in Anatomy and function of the penial twin papillae system of the Helicinae (Gastropoda: Helicoidea: Helicidae) and description of two new, small Hemicycla species from the laurel forest of the Canary Islands
FIGURE 3. A. Hemicycla laurijona sp. nov., paratype from Puntas Coloradas, La Gomera. B. Hemicycla fulgida sp. nov., paratype from El Bailadero, Tenerife.
FIGURE 2. Shell drawings. A in Anatomy and function of the penial twin papillae system of the Helicinae (Gastropoda: Helicoidea: Helicidae) and description of two new, small Hemicycla species from the laurel forest of the Canary Islands
FIGURE 2. Shell drawings. A. Hemicycla laurijona sp. nov. holotype. B. Hemicycla fulgida sp. nov., holotype showing the placement of the measurements obtained. BH, body whorl height (at columella level); BP, body whorl frontal perimeter; BS, body whorl frontal surface (plane view); D1, maximum shell diameter; D2, shell diameter perpendicular to D1; FP, shell frontal perimeter; FS, shell frontal surface (plane view); SH, shell height; SP, shell perimeter (dorsal plane view); SS, shell surface (dorsal plane view).
FIGURE 1 in Anatomy and function of the penial twin papillae system of the Helicinae (Gastropoda: Helicoidea: Helicidae) and description of two new, small Hemicycla species from the laurel forest of the Canary Islands
FIGURE 1. Geographical distribution of Hemicycla laurijona sp. nov. and Hemicycla fulgida sp. nov. The blue arrow indicates approximately the area of the Hemicycla invernicata type locality. Symbols represent 1 x 1 km UTM squares.
FIGURE 4. Genital system. A in Hemicycla (Hemicycla) fuenterroquensis (Gastropoda: Helicoidea: Helicidae), a new species from La Palma, Canary Islands
FIGURE 4. Genital system. A, Hemicycla vermiplicata; B, H. fuenterroquensis sp. nov.; C, H. granomalleata; bc, bursa copulatrix; bd, bursa duct; cs, common stalk of the bursa copulatrix complex; d, diverticulum; ds, dart sac; e, epiphallus; f, flagellum; go, genital orifice; pp1, proximal penial papilla; pp2, distal penial papilla; pc, penial chamber; r, retractor muscle.
FIGURE 3. A in Hemicycla (Hemicycla) fuenterroquensis (Gastropoda: Helicoidea: Helicidae), a new species from La Palma, Canary Islands
FIGURE 3. A, Shell drawings of Hemicycla fuenterroquensis sp. nov., holotype, showing the placement of the measurements obtained for Table 1. B, Scatter plots of some shell measurements of the studied species. BH, body whorl height (at columella level); BP, body whorl frontal perimeter; BS, body whorl frontal surface (plane view); D1, maximum shell diameter; D2, shell diameter perpendicular to D1; FP, shell frontal perimeter; FS, shell frontal surface (plane view); SH, shell height; SP, shell perimeter (dorsal plane view); SS, shell surface (dorsal plane view).
FIGURE 2 in Hemicycla (Hemicycla) fuenterroquensis (Gastropoda: Helicoidea: Helicidae), a new species from La Palma, Canary Islands
FIGURE 2. Shells and details of the body whorl ornamentation of the three known Hemicycla species from La Palma Island. A, B, Hemicycla vermiplicata; C, D, H. fuenterroquensis sp. nov.; E, F, H. granomalleata. The arrows in Fig. 2 D highlight the weak microsculpture of the H. fuenterroquensis sp. nov. shell.
FIGURE 1 in Hemicycla (Hemicycla) fuenterroquensis (Gastropoda: Helicoidea: Helicidae), a new species from La Palma, Canary Islands
FIGURE 1. Geographical distribution of the known Hemicycla species from La Palma Island, and a detailed photograph of a Hemicycla fuenterroquensis sp. nov. specimen described in the present study.
FIGURES 22–32. 22–23 in The fossil pulmonate snails of Sandelzhausen (Early / Middle Miocene, Germany): Succineidae, Testacelloidea and Helicoidea
FIGURES 22–32. 22–23.?Helicodonta sp. (BSPG 1959 II 17678; D = 4.3 mm). 24–25. Helicodontidae indet. (BSPG 1959 II 17300; D = 3.7 mm). 26–27. Leucochroopsis kleinii (BSPG 1959 II 16147; D = 5.0 mm). 28–29. Urticicola perchtae sp. nov. (holotype; BSPG 1959 II 17312; H = 3.5 mm). 30–31. Urticicola perchtae sp. nov. (paratype; BSPG 1959 II 17313; H = 2.9 mm). 32. Urticicola perchtae sp. nov., protoconch detail (holotype; BSPG 1959 II 17312).
FIGURES 1–21. 1–2 in The fossil pulmonate snails of Sandelzhausen (Early / Middle Miocene, Germany): Succineidae, Testacelloidea and Helicoidea
FIGURES 1–21. 1–2. Succinea minima (BSPG 1959 II 17471; H = 2.6 mm). 3–4. Palaeoglandina sp. (BSPG 1959 II 16145; H = 49.7 mm). 5. Testacella zelli (BSPG 1959 II 17689; H = 2.3 mm). 6–9. Klikia cf. coarctata (BSPG 1959 II 16144; D = 9.3 mm). 10–13. Cepaea cf. eversa (BSPG 1959 II 16162; D = 26.0 mm). 14–17. Cepaea cf. sylvestrina (BSPG 1959 II 16156; D = 19.9 mm). 18–19. Tropidomphalus cf. incrassatus (BSPG 1959 II 456; D = 28.8 mm). 20–21. Tropidomphalus cf. incrassatus (BSPG 1959 II 457; D = 35.1 mm).
Data from: Two complete mitochondrial genomes from Praticolella mexicana Perez, 2011 (Polygyridae) and gene order evolution in Helicoidea (Mollusca, Gastropoda)
Helicoidea is a diverse group of globally distributed land snails. While much is known regardingthe relationships of helicoid taxa, comparatively little is known about the evolution of themitochondrial genome in the superfamily. We sequenced two complete mitochondrial genomesfrom Praticolella mexicana Perez, 2011 representing the first such data from the helicoid familyPolygyridae, and used them in an evolutionary analysis of mitogenomic gene order. We foundthe mitochondrial genome of P. mexicana to be 14,008 bp in size, possessing the typical 37metazoan genes. Multiple alternate stop codons are used, as are incomplete stop codons, andmitogenome size and nucleotide content is consistent with other helicoid species. Our analysis ofgene order suggested that Helicoidea has undergone five mitochondrial rearrangements in thepast. Four rearrangements were limited to tRNA genes, including one homoplasticrearrangement in Helicidae and (Bradybaenidae+Camaena+P. mexicana). The fifthrearrangement, unique to Aegista, involved a protein coding gene.
Figure 1 from: Hernández M, Bauzá MA, Backeljau T (2022) Genital anatomy, jaw and radula of Guladentia subtussulcata (Helicoidea, Cepolidae), endemic to western Cuba. ZooKeys 1080: 99-106. https://doi.org/10.3897/zookeys.1080.73194
Figure 1 Shells of Guladentia subtussulcataA–C (A and B lateral views and C ventral view), Jeanneretia parraianaD–F (D and E lateral views and F ventral view), Cepolis cepaG–I (G and H lateral views and I ventral view). Scale bar = 5 mm.
Figure 2 from: Hernández M, Bauzá MA, Backeljau T (2022) Genital anatomy, jaw and radula of Guladentia subtussulcata (Helicoidea, Cepolidae), endemic to western Cuba. ZooKeys 1080: 99-106. https://doi.org/10.3897/zookeys.1080.73194
Figure 2 Genital anatomy of Guladentia subtussulcataA genitalia B auxiliary copulatory organ details) C details of the distal portion of the auxiliary copulatory organ D drawing of the fertilization pouch–spermathecal complex E drawing of the details of the verge. Abbreviations: aco = auxiliary copulatory organ, ag = albumen gland, agl = accessory gland, as = atrial sac, bc = bursa copulatrix, bcd = bursa-copulatrix duct, e = proximal epiphallus, fl = flagellum, fp = fertilization pouch, fpsc = fertilization pouch–spermathecal complex, hd = hermaphroditic duct, mp = muscular papilla, ncs = non-calcareous structure, pe = penis + distal epiphallus, ov = oviduct, pmg = pedunculated mucus gland, pg = prostatic gland, prm = penial retractor muscle, so = spermoviduct, ss = single spermatheca, v = verge, vd = vas deferens.
Figure 3 from: Hernández M, Bauzá MA, Backeljau T (2022) Genital anatomy, jaw and radula of Guladentia subtussulcata (Helicoidea, Cepolidae), endemic to western Cuba. ZooKeys 1080: 99-106. https://doi.org/10.3897/zookeys.1080.73194
Figure 3 Scanning Electron Microscope photographs of the jaw and radula of Guladentia subtussulcata. A jaw B central and lateral teeth, central teeth marked with a black arrow C transitional and marginal teeth, the latter with their ectocones (e), mesocones (m), and endocones (ed).
Figures 20-21 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figures 20-21 - Pallial system: (20) photograph of the ventral zone of the pulmonary roof, note the long kidney, with respect to the total length of the lung; (21) line drawing of the same region detailing the limits between kidney and ureter and the shallow veins crossing the pulmonary roof. Scale bar: 21 = 5mm. Abbreviations (k) kidney, (mc) mantle collar, (pv) pericardic vein, (r) rectum, (su) secondary ureter.
Figures 14-19 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figures 14-19 - Digestive system: (14) Dorso-lateral view of the radula, arrows points to central tooth in two transverse rows of teeth; (15) detail on a dorso-lateral view of the lateral teeth;(16) detail of lateral teeth close to margin in dorsal view (17) margin of the radula showing curve shaped marginal teeth; (18) dorsal view of the smooth, fragile jaw; (19) detail of the dorsal surface of the jaw showing transversal shallow grooves. Scale bars = 10 μm.
Figure 1 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figure 1 - Shell measurements. Abbreviations (AD) dorsal view area, (Aap) apertural area, (Abw) body whorl area, (AL) lateral view area, (Dap) apertural diameter, (DM) major diameter, (Dm) minor diameter, (H) total shell height, (Hap) height of aperture, (Hbw) body whorl height, (Pbw) body whorl perimeter, (PD) dorsal view shell perimeter, (PL) lateral view shell perimeter, (PS) parietal space.
Figures 8-13 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figures 8-13 - Shell morphology: (8) Protoconch in dorsal view, scale bar = 4mm; (9) lateral view of the protoconch and first whorls, scale bar = 4mm; (10) general view of the teleoconch microsculpture, scale bar = 100μ; (11) body whorl microsculpture consisting on axial rows of triangular lamella separated by wrinkles; (12) perpendicular view of the lamella, scale bar = 5μ; (13) detail of a triangular lamellae showing its central axis, scale bar = 2 μm.
Figures 2-7 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figures 2-7 - Shell morphology: (2) Dorsal view of Holotype, MNRJ 34.580; (3) lateral position of holotype shell and soft body; (4) dorsal, (5) ventral, and (6) lateral view of paratype, IBN 861; (7) live snail. Scale bar: 3–5 = 10 mm.
Figure 27 from: Gabriela Cuezzo M, Pena MS (2017) Minaselates, a new genus and new species of Epiphragmophoridae from Brazil (Gastropoda: Stylommatophora: Helicoidea). Zoologia 34: 1-12. https://doi.org/10.3897/zoologia.34.e13230
Figure 27 - Consensus tree obtained from two trees under implied weight approach highlighting the position of Minaselates gen. n. Only taxa with described anatomy were included in the matrix. Numbers below branches are node numbers. Symmetric resampling values (left number) and jackknife values (right number) are located above branches. Only values above 50% are illustrated.
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