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Figure 10 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 10. Consensus tree of Patellogastropoda from phylogenetic reconstruction using Bayesian inference, based on 472 bp of the mitochondrial COI gene at the barcoding region. Node values indicate Bayesian posterior probabilities, shown only for those> 0.7. GenBank accession numbers of the sequences used are indicated in parentheses after the authority and date for each species.

Figure 6 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 6. Neolepetopsis ardua sp. nov., external anatomy (paratype 1, NSMT-Mo 79219). Left, dorsal view after removal of the shell; right, ventral view. Abbreviations: a, anus; dg, digestive gland; f, foot; i, intestine; ll, labial lappet; m, mouth; me, mantle edge; ol, outer lip of the mouth; ov, ovary; pc, pericardium; r, rectum; rk, right kidney; s, stomach; sm, shell muscles; sp, sensory papillae; t, cephalic tentacle; up, urinogenital papilla. Scale bar: 1 mm.

Figure 2. Neolepetopsis species. A–D in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 2. Neolepetopsis species. A–D, Neolepetopsis prismatica sp. nov., type specimens from the Wocan field, Carlsberg Ridge. A, holotype (RSIO 38210), shell length (SL) 4.1 mm. B, paratype 1 (NSMT-Mo 79214), SL 4.2 mm. C, paratype 2 (RSIO 38211), SL 4.0 mm. D, paratype 3 (NSMT-Mo 79215), SL 3.5 mm. E, Neolepetopsis ardua sp. nov. from the Longqi field, Southwest Indian Ridge, holotype (RSIO 49001), with and without the soft parts, SL 5.1 mm. Scale bars: 1 mm.

Figure 9 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 9. Eulepetopsis crystallina sp. nov., external anatomy (paratype 1, NSMT-Mo 79223). Left, dorsal view after removing the shell; right, ventral view. Abbreviations: a, anus; dg, digestive gland; f, foot; i, intestine; j, jaw projecting from the mouth; ll, labial lappet; me, mantle edge; ol, outer lip of the mouth; pc, pericardium; r, rectum; rk, right kidney; s, stomach; sm, shell muscles; sp, sensory papillae; t, cephalic tentacle; te, testis; up, urinogenital papilla. Scale bar: 1 mm.

Figure 5 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 5. Neolepetopsis ardua sp. nov., scanning electron micrographs. A, apex. B, details of the shell sculpture. C, D, radula. Scale bars: 100 µm in A; 200 µm in B; 10 µm in C, D.

Figure 1 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 1. Map showing the locations of the deep-sea hydrothermal vents sampled for the present study. A, overview. B, close-up of the Central Indian Ridge area near the Rodriguez Triple Junction. Key: 1, Wocan field, Carlsberg Ridge; 2, Edmond field, Central Indian Ridge; 3, Kairei field, Central Indian Ridge; 4, Tiancheng field, Southwest Indian Ridge; 5, Longqi field, Southwest Indian Ridge. The maps were generated using the General Bathymetric Chart of the Oceans (GEBCO; https://www.gebco.net/) grid display software and GEBCO 1 arc-min interval grid using the Mercator projection.

Figure 3 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 3. Neolepetopsis prismatica sp. nov., scanning electron micrographs. A, B, protoconch. Arrowheads indicate the limits of the protoconch. A, side view. B, dorsal view. C, details of the shell sculpture. D, E, radula. Scale bars: 100 µm in A, B; 250 µm in C; 5 µm in D, E.

Figure 4 in Neolepetopsid true limpets (Gastropoda: Patellogastropoda) from Indian Ocean hot vents shed light on relationships among genera

Figure 4. Neolepetopsis prismatica sp. nov., external anatomy (paratype 1, NSMT-Mo 79214). Left, dorsal view after removal of the shell; right, ventral view. Abbreviations: a, anus; dg, digestive gland; f, foot; i, intestine; ll, labial lappet; m, mouth; me, mantle edge; ol, outer lip of the mouth; pc, pericardium; r, rectum; rk, right kidney; sm, shell muscles; sp, sensory papillae; t, cephalic tentacle; te, testis; up, urinogenital papilla. Scale bar: 1 mm.

Figs 55–56. Lindholmiola spectabilis. Fig. 55 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 55–56. Lindholmiola spectabilis. Fig. 55: NMBE 515646, Greece, Makedonía, Kalithia in direction to Anthohóri (coarsely ribbed, slightly scalarid form), D = 11.48 mm; Fig. 56: NMBE 515647, Greece, Angítis Canyon, well at the Mara cave (large, wide umbilicus), D = 14.2 mm. — All photos Neubert/ Bochud, × 3.

Figs 44–46 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 44–46. Genital organs of Lindholmiola species. Fig. 44: Lindholmiola gyria, a: situs, b: lumina of genital organs, Turkey, Vilayet Antalya, Phaselis; Fig. 45: Lindholmiola barbata, a: situs, b: lumina of genital organs, Greece, Island Kríti, Nomos Haniá, Soúda Bay; Fig. 46: Lindholmiola regisborisi, a: situs, b: lumina of genital organs, Greece, Makedonía, 400 m S of Kehrókambos.

Figs 52–54. Lindholmiola spectabilis. Fig. 52 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 52–54. Lindholmiola spectabilis. Fig. 52: paratype Lindholmiola lens spectabilis, SMF 158640, Greece, Makedonía, (peninsula) Athos, monastery Kireta, D = 17.34 mm; Fig. 53: NMBE 515645, Greece, Makedonía, mountain slope N of Podohóri, (tightly coiled shell, narrow umbilicus), D = 12.02 mm; Fig. 54: NMBE 515644, Greece, Makedonía, N boundary of Taxiárhis (small, strongly ribbed, slightly scalarid form), D = 11.09 mm. — All photos Neubert/Bochud, × 3.

Figs 47–50. Lindholmiola reischuetzi. Fig. 47 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 47–50. Lindholmiola reischuetzi. Fig. 47: syntype Helix (Gonostoma) lens var. insularis, SMF 7048/1, Greece, Island Thássos, D = 9.4 mm; Fig. 48: NMBE 515640, Greece, Makedonía, Halkidikí Peninsula, close to the cave of Petrálona, D = 10.13 mm; Fig. 49: NMBE 515639, Greece, Thráki, Canyon 2 Km N of Xánthi (form with large umbilicus and broad whorls), D = 12.43 mm; Fig. 50: NMBE 515641, Greece, Makedonía, N boundary of Taxiárhis (scalarid form), D = 12.01 mm. — All photos Neubert/Bochud, × 3.

Figs 40–42. Lindholmiola regisborisi. Fig. 40 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 40–42. Lindholmiola regisborisi. Fig. 40: syntype Caracollina regis-borisi, NMNH (Sofia) 3167/4, Greece, Thrakia, Xanthi, D = 17.4 mm; Fig. 41: NMBE 515619, Greece, Makedonía, 400 m S of Kehrókambos, D = 15.01 mm; Fig. 42: NMBE 515630, Turkey, Marmara Adasi, Kaleh, D = 14.78 mm. — All photos Neubert/Bochud, × 3.

Figs 36–38. Lindholmiola pirinensis. Fig. 36 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 36–38. Lindholmiola pirinensis. Fig. 36: holotype Lindholmiola contorta pirinensis, ZMB 101257, Bulgaria, Banderica Valley, D = 14.2 mm; Fig. 37: NMBE 515637, Greece, Thráki, Canyon 2 km N of Xánthi (flat form with wide umbilicus, arid areas), D = 10.8 mm; Fig. 38: NMBE 515638, Greece, Makedonía, beech forest 3.2 km N Makriplágio (large form of wooded areas), D = 14.5 mm. — All photos Neubert/Bochud, × 3.

Figs 24–25. Lindholmiola corcyrensis. Fig. 24 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 24–25. Lindholmiola corcyrensis. Fig. 24: syntype Helix corcyrensis var. octogyrata, ZMZ 508745, Ípiros, surroundings of Préveza, D = 14.36 mm; Fig. 25: NMBE 515623, Evritanía, mountain ca. 5 Km NE of Vráha (large form), D = 13.73 mm. — All photos Neubert/Bochud, × 3.

Figs 20–23. Lindholmiola corcyrensis. Fig. 20 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 20–23. Lindholmiola corcyrensis. Fig. 20: NMBE 515620, Island Kérkira between Dassía and Káto Korakiána (form with narrow umbilicus, Ionian Islands), D = 10.8 mm; Fig. 21: NMBE 515622, Island Lefkáda, above Póros (small form), D = 9.19 mm; Fig. 22: NMBE 515621, Ipiros, Tímfi Mts., hiking path of Pápigo, 1–2 Km N of the shelter (large umbilicus, flat shell), D = 11.23 mm; Fig. 23: syntype Helix (Trigonostoma) corcyrensis var. cefalonica, ZMZ 508737, Island Kefaloniá, "aux environs d'Argostoli, ...à Frangata et Grisata", D = 12.0 mm. — All photos Neubert/Bochud, × 3.

Figs. 1–2 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs. 1–2. Genital organs of Helicodontidae. Fig. 1: Lindholmiola barbata; Greece, Kríti, Nomos Haniá, Bay of Soúda, 100–150 m from the mouth of the river S of the English cemetery. Fig. 2: Helicodonta obvoluta (O. F. MüLLER, 1774); Belgium, valley of the Meuse, 500 m from Annevoie in direction to Dinant, 2a) situs of genital organs, 2b) interior structure of penis. — Abbreviations used for the description of the genital organs: A = atrium, Al = albumen gland, E = Epiphallus, G = distal glandular part of epiphallus, Gl = Glandula, Hd = hermaphroditic duct, Hg = hermaphroditic gland, P = Penis, R = retractor muscle, Sp = Spermoviduct, V = vesicle, Vag = Vagina, Vd = Vas deferens.

Figs 12–14. 12 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 12–14. 12: Genital organs of Lindholmiola species. Fig. 12: Lindholmiola lens, a: situs, Greece, Ilía (= Elis) between Olimbía and Kréstena, b: lumina of genital organs, Greece, Ahaïa, 3 Km S of Ptéri; Fig. 13: Lindholmiola spectabilis, a: situs, b: lumina of genital organs, Greece, Makedonía, Falakró Mts., Ágios Pnevma plateau; Fig. 14: Lindholmiola girva, a: situs, b: lumina of genital organs, Greece, Makedonía, Taxiárhis.

Figs 7–11. Lindholmiola lens. Fig. 7 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 7–11. Lindholmiola lens. Fig. 7: NMBE 515616, Greece, Ilía (= Elis), Alfiós canal between Olimbía and Kréstena (nominotypical form), D = 11.78 mm; Fig. 8: NMBE 515617, Greece, Fokída, Delphi, archaeological site (flat keeled form,broad whorls, wide umbilicus), D = 14.85 mm; Fig. 9: NMBE 515614, Greece, Thessalía, W boundary of Morfovoúni (densely coiled, blunt keel, narrow umbilicus), D = 12.88 mm; Fig. 10: NMBE 515615, Greece, Makedonía, Kassándra Peninsula, Loutrá (small form, blunt keel, moderately wide umbilicus), D = 7.95 mm; Fig. 11: NMBE 515629, Greece, Makedonía, Canyon 2 Km N of Neohóri (= NE of Aridéa) (flat form, blunt keel, wide umbilicus), D= 14.16 mm. — All photos Neubert/Bochud, × 3.

Figs 3–6. Lindholmiola lens. Fig. 3 in Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae)

Figs 3–6. Lindholmiola lens. Fig. 3: syntype Helix lentiformis, ZMZ 508656, "Thessalie et Attique", D = 11.2 mm; Fig. 4: NMBE 515542, Attika, Methana, 500 m before village, 12.07.1996, leg. E. Neubert, D = 12.77 mm; Fig. 5: syntype Helix lens var. callojuncta, NHMG 372, D = 12.0 mm; Fig. 6: syntype Helix lens var. elia, SMF 101961, Kumani, Elis, coll. Jetschin ex Boettger, 1883, D = 11.94 mm. — All photos Neubert/Bochud, × 3.