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Fig. 1 in A new genus and species of uncertain phylogenetic position within the family Hydrobiidae (Caenogastropoda, Truncatelloidea) discovered in Tunisian springs

Fig. 1. Map and photographs of the studied sampling sites. A. Map showing the geographic distribution of Bullaregia tunisiensis sp. nov. B. Aïn Gnaa (Bulla-régia, Jendouba). C. Djebba (Thibar, Beja).

Fig. 5 in Two new genera and three new subterranean species of Hydrobiidae (Caenogastropoda: Truncatelloidea) from Tunisia

Fig. 5. Shells, opercula and radulae, Belgrandiellopsis secunda gen. et sp. nov. A–D. Shells. A–B. Holotype, MNCN 15.05/200098H. C–D. Paratypes, MNCN 15.05/200098P. E–F. Operculum (E = inner side; F = outer side). G. Detailed microsculpture of protoconch. H–J. Radulae. H. Portion of radula ribbon. I. Central radular teeth. J. Outer marginal teeth.

Fig. 1 in Two new genera and three new subterranean species of Hydrobiidae (Caenogastropoda: Truncatelloidea) from Tunisia

Fig. 1. Map and photographs of the collecting localities. A. Map showing the collecting localities in Tunisia. B. Chorfa Spring, Province Béja. C. Ettoute Spring, Province Bizerte. D. Soudene Well (Menzel Bourguiba city), Province Bizerte.

Fig. 8 in Two new genera and three new subterranean species of Hydrobiidae (Caenogastropoda: Truncatelloidea) from Tunisia

Fig. 8. Anatomy of Biserta putealis gen. et sp. nov. (paratypes, UGSB 17664). A. Ctenidium and osphradium. B. Stomach. C. Head of male and penis. D. Detail of penis and penis lobes. E. Pallial oviduct. F. Bursa copulatrix and seminal receptacles. G. Ditto, observed by transmitted light. Anatomical abbreviations explained in the text.

Figure 5 from: Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37-46. https://doi.org/10.3897/zookeys.935.51414

Figure 5 A Habitat of Pincerna vallis Chen & Wu, sp. nov. (HBUMM 10017-spec. 1, holotype) B habitat of Sinoarinia feii Chen, gen. et sp. nov. Photos: Zhe-Yu Chen.

Figure 3 from: Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37-46. https://doi.org/10.3897/zookeys.935.51414

Figure 3 Inner structure of Sinoarinia feii Chen, gen. et sp. nov. (HBUMM 10016-spec. 5, paratype) (Photos: Zhe-Yu Chen). Abbreviations: par-parietal lamella, pal-palatal plica, cl-columellar lamella, green dotted line-constriction.

Figure 4 from: Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37-46. https://doi.org/10.3897/zookeys.935.51414

Figure 4 A, BPincerna vallis Chen & Wu, sp. nov. AHBUMM 10017-spec. 1, holotype, red arrow shows the operculum BHBUMM 10017-spec. 2, paratype C, DPincerna costulosa (Bavay & Dautzenberg, 1912) C HBUMM10018 D syntype, MNHN-IM-2000-31786. Scale bar: 5 mm. Photos: Zhe-Yu Chen (A–C) and M. Caballer Gutierrez (D).

Figure 1 from: Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37-46. https://doi.org/10.3897/zookeys.935.51414

Figure 1 Map of sampling sites and type localities 1 type locality of Sinoarinia feii Chen, gen. et sp. nov. and Pincerna vallis Chen & Wu, sp. nov. 2 type locality of Sinoarinia maolanensis (Zhang, Chen & Zhuo, 2013) comb. nov. 3 type locality of Sinoarinia mirifica (Li, Zhuo & Luo, 2005) comb. nov. 4 type locality of Pincerna costulosa (Bavay & Dautzenberg, 1912) and Sinoarinia aesopus (Bavay & Dautzenberg, 1904) comb. nov., Vietnam 5 Sampling site of Pincerna costulosa in Yunnan.

Figure 2 from: Chen Z-Y, Wu M (2020) Two new cyclophoroid species from Hubei, China, with proposal of a new genus (Gastropoda, Caenogastropoda, Diplommatinidae and Alycaeidae). ZooKeys 935: 37-46. https://doi.org/10.3897/zookeys.935.51414

Figure 2 ASinoarinia feii Chen, gen. et sp. nov. (HBUMM 10016-spec. 1, holotype) (Photos: Zhe-Yu Chen) BSinoarinia maolanensis (Zhang et al., 2013) comb. nov. (after Zhang et al. 2013) CSinoarinia mirifica (Li et al., 2005) comb. nov. (after Li et al. 2005) DSinoarinia aesopus (Bavay & Dautzenberg, 1904) comb. nov. (after Bavay & Dautzenberg, 1904). Scale bar: 1 mm, refers to A and B only.

Figure 5 from: Simone LRL, Cavallari DC, Salvador RB (2020) A new troglobite species of Habeastrum Simone, 2019 from Brazil, and support for classification in Diplommatinidae (Mollusca, Caenogastropoda). Zoosystematics and Evolution 96(2): 639-647. https://doi.org/10.3897/zse.96.53880

Figure 5 Map of Minas Gerais state showing the municipalities where Habeastrum strangei sp. nov. occurs.

Figure 3 from: Simone LRL, Cavallari DC, Salvador RB (2020) A new troglobite species of Habeastrum Simone, 2019 from Brazil, and support for classification in Diplommatinidae (Mollusca, Caenogastropoda). Zoosystematics and Evolution 96(2): 639-647. https://doi.org/10.3897/zse.96.53880

Figure 3 Anatomy of Habeastrum strangei sp. nov. A. head-foot, male, right-slightly anterior view; B. pallial cavity, ventral view and visceral mass partially uncoiled, some structures seen be translucency; C. head and haemocoel, ventral view, foot and columellar muscle removed; D. foregut, ventral view; E. same, left view; F. odontophore, dorsal view, superficial layer of structures removes, cartilages deflected. Scale bars: 250 μm.

Figure 2 from: Simone LRL, Cavallari DC, Salvador RB (2020) A new troglobite species of Habeastrum Simone, 2019 from Brazil, and support for classification in Diplommatinidae (Mollusca, Caenogastropoda). Zoosystematics and Evolution 96(2): 639-647. https://doi.org/10.3897/zse.96.53880

Figure 2 SEM images of Habeastrum strangei sp. nov. A. protoconch detail (MZSP 150023); B–E. Radula (MZSP 137145), in different views. Scale bars: 100 μm (A.); 5 μm (B–E.).

Figure 1 from: Simone LRL, Cavallari DC, Salvador RB (2020) A new troglobite species of Habeastrum Simone, 2019 from Brazil, and support for classification in Diplommatinidae (Mollusca, Caenogastropoda). Zoosystematics and Evolution 96(2): 639-647. https://doi.org/10.3897/zse.96.53880

Figure 1 Shells of Habeastrum strangei sp. nov. A–E. specimens before shell crushing for anatomical study (MZSP 137145); A. spm #1 apertural view, soft body seen by translucency (1.6 mm high); B. same, dorsal view; C. same, umbilical view (1.1 mm wide); D. spm #2, apertural view (1.9 mm high); E. operculum of spm #1, outer view (0.4 mm wide); F–H. SEM images of shells, all in same scale for comparison; F. holotype, adult (MZSP 151626); G. paratype, juvenile (MZSP 151628); H. juvenile (MZSP 150023).

Figure 4 from: Simone LRL, Cavallari DC, Salvador RB (2020) A new troglobite species of Habeastrum Simone, 2019 from Brazil, and support for classification in Diplommatinidae (Mollusca, Caenogastropoda). Zoosystematics and Evolution 96(2): 639-647. https://doi.org/10.3897/zse.96.53880

Figure 4 Anatomy of Habeastrum strangei sp. nov. A. pallial cavity roof, female, ventral view; B. central nervous system (nerve ring), ventral view; C. penis and adjacent region of nuchal surface, dorsal view. Scale bars: 250 μm.

Figure 5 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 5 A–DMeioceras nitidum, specimen MNHN-IM-2013-72087 A light microscopic picture BSEM scan CSEM close-up of mucro and D microsculpture EM. cubitatum, specimen USNM 1618851 F, GC. cf. corrugulatum, specimen USNM 1618861 F light microscopic picture G light microscopic close-up of microstructure H MOTU II, specimen USNM 1618853 I–L MOTU I, specimen ZSM-Mol-20200039 I light microscopic picture JSEM scan KSEM close-up of mucro and L microsculpture MC. glabrum, specimen ZSM-Mol-20200096 NC. glabellum auctt. non Adams, specimen ZSM-Mol-20200074 O–RC. invisibile sp. nov., holotype ZSM-Mol-20100320 O light microscopic picture PSEM scan QSEM close-up of mucro and R microsculpture. Scale bars: 10 µm (R); 20 µm (C, K, L, Q); 50 µm (D, E) 100 µm (I, J, O, P); 200 µm (A, B, M, N).

Figure 7 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 7 A–FCaecum pulchellumA, C, E, F specimen ZSM-Mol-20090485 B, D juvenile specimen ZSM-Mol-20200118 A, B light microscopic pictures C, DSEM scans E close-up of mucro and F microsculpture H–KC. donmoorei, specimen USNM 1618844 H–KC. regulare, specimen ZSM-Mol-20100321, juvenile H light microscopic picture ISEM scans J close-up of mucro and K microsculpture L–TC. cf. teres and C. cf. strangulatumL specimen ZSM-Mol-20200033, juvenile specimen with larval shell still attached M, N, Q, S specimen ZSM-Mol-20200032, juvenile M light microscopic picture NSEM scan Q close-up of mucro and S microsculpture O, P, R, TC. cf. strangulatum, specimen ZSM-Mol-20200038, juvenile O light microscopic picture PSEM scan R close-up of mucro and T microsculpture U–XC. cf. semilaeve, specimen ZSM-Mol-20200034 U Light microscopic picture VSEM scan W close-up of mucro and X microsculpture. Scale bars: 10 µm (F, S, T, W, X); 20 µm (J, K, Q, R); 50 µm (E); 100 µm (H, I, L–P, U, V); 200 µm (A–D).

Figure 1 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 1 Morphology of Caecum (Caecidae) including important shell features used for morphological species identification. USNM 1618850 Caecum imbricatum – specimens to the left. Abbreviations: a, aperture; cgs, ciliated gliding sole; eg, egg; ey, eye; fp, fecal pellets; hf, retracted head and foot; mu, mucro; op, operculum; se, septum; st, shell structure (ornamentation); t, tentacle; tb, tube. Scale bar: 500 µm.

Figure 4 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 4 Molecular based species delimitation of Central American Caecidae. Guide tree used for PTP and bPTP based on the optimal likelihood tree of the concatenated three-marker dataset. Color codes indicate our preliminary species hypothesis derived from the phylogenetic tree. Color bars reflect the species delimitation suggested by the four consulted species delimitation programs (including ML and Bayesian implementation for PTP and single and multiple threshold for GMYC). Bars are missing where no sequence data obtained.

Figure 6 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 6 A–ECaecum heptagonumA specimen USNM 1618866 juvenile specimen with larval shell still attached B–E specimen ZSM-Mol-20200030, juvenile specimen already resembling closely the adult form B light microscopic picture CSEM scan D close-up of mucro and E microsculpture F–IC. cooperi, specimen MNHN-IM-2019-32 F light microscopic picture GSEM scan H close-up of mucro and I microsculpture whole specimen and close-up of mucro and microsculpture J–MC. debile, specimen MNHN-IM-2019-27 J light microscopic picture KSEM scan L close-up of mucro and M microsculpture N–QC. striatum, specimen ZSM-Mol-20100322 N light microscopic picture OSEM scan P close-up of mucro and Q microsculpture R–UC. clathratum, specimen MNHN-IM-2019-17 R light microscopic picture SSEM scan T close-up of mucro and U microsculpture. Scale bars: 10 µm (D, E, I, Q); 20 µm (H, M, P, U); 100 µm (A, B, C, L, N, O, T); 200 µm (F, G, J, K whole specimen); 300 µm (R, S).

Figure 3 from: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986

Figure 3 Optimal ML tree of the concatenated 28S rRNA, 16S rRNA and COI genes partitioned by genes and COI codon positions. Bootstrap values (below nodes) of the ML analysis are shown for values > 80% and posterior probability support (above nodes) of the BI analysis are shown for values > 0.95. Specimens previously classified as Meioceras are indicated in yellow color. Smooth, translucent specimens, lacking diagnostic features and summarized in the ´Caecum glabrum-like complex` are indicated in blue. C. = Caecum, M. = Meioceras, MOTU I/ MOTU II = molecular operational taxonomic unit within the ´Caecum glabrum-like complex`. Figured specimens are all to the same scale. Scale bar: 1 mm.