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FIGURE 1 in Unraveling another of the 'Big Fiveʹ: new species and records of Cerithiopsidae from Brazil (Caenogastropoda: Triphoroidea)

FIGURE 1. Cerithiopsis gemmulosa (C. B. Adams, 1850) species complex. A–B: holotype from Jamaica (MCZ 186075); C–D, F, N–O: shells from Rio de Janeiro state (C–D: MORG ex–19330; F: MORG 33005; N–O: MNRJ 26853); E, P–T: shells from Bahia state (E: IBUFRJ 14146; P–Q: MZSP 155546; R–T: MZSP 155508); G–J: shells from Florida (G–H: MNRJ 17992; I–J: BMSM 81286); K: shell from Santa Catarina state (MZSP 8336); L–M: shell from Pernambuco state (MNHN). Lengths of whole shells: A–B: 5.1 mm; C–D: 4.7 mm; E: 4.5 mm; F: 4.3 mm; G–H: 5.3 mm; I–J: 3.9 mm; K: 4.9 mm; L–M: 3.4 mm; N–O: 3.0 mm; P–Q: 3.0 mm; R: 3.7 mm; S–T: 3.4 mm. Scale bar: 1 mm. Horizontal lines indicate that the two images are from the same shell.

FIGURE 5 in Unraveling another of the 'Big Fiveʹ: new species and records of Cerithiopsidae from Brazil (Caenogastropoda: Triphoroidea)

FIGURE 5. Cerithiopsis pisinna sp. nov. A: holotype, from Espírito Santo State (MNRJ 15391); B–D: paratype, from type locality (IBUFRJ 14137); C–D: body whorl and protoconch of paratype. Lengths of whole shells: A: 2.6 mm; B: 2.5 mm. Scale bars: A–B: 1 mm; C–D: 200 µm.

FIGURE 2 in Unraveling another of the 'Big Fiveʹ: new species and records of Cerithiopsidae from Brazil (Caenogastropoda: Triphoroidea)

FIGURE 2. Cerithiopsis gemmulosa (C. B. Adams, 1850) species complex. A–B: protoconch of shell from Florida (BMSM 81286; B: magnification of figure 1J); C: protoconch of shell in figure 1M (MNHN); D: protoconch of shell from Rio de Janeiro state (MNRJ 26853); E: protoconch of shell in figure 1Q (MZSP 155546); F: protoconch of shell in figure 1O (MNRJ 26853); G: protoconch of shell from Rio de Janeiro state (MNRJ 34238); H: body whorl of holotype (MCZ 186075); I: body whorl of shell in figure 1D (MORG ex–19930); J: body whorl of shell in figure 1H (MNRJ 17992; K: body whorl of shell in figure 1J (BMSM); L: body whorl of shell from Pernambuco state (MNHN); M: body whorl of shell in figure 1O (MNRJ 26853). Scale bars: A–G: 100 µm; H–M: 1 mm.

FIGURE 2 in Caecum wakense: a new Caecidae (Gastropoda: Caenogastropoda) from Wake Atoll (Pacific Ocean)

FIGURE 2. Conceptual reconstruction of growth stages of Caecum wakense sp. nov.: A. Protoconch to teleoconch IV. B. Surface of teleoconchs I and II. C. Surface of teleoconchs III and IV. White dots indicate transition points.

FIGURE 3 in Unraveling another of the 'Big Fiveʹ: new species and records of Cerithiopsidae from Brazil (Caenogastropoda: Triphoroidea)

FIGURE 3. Cerithiopsis lata (C. B. Adams, 1850). A–B: holotype, from Jamaica (MCZ 186134); C: holotype of Cerithiopsis buijsei De Jong & Coomans, 1988, from Curaçao/Aruba (ZMA 387069); D–E: shells from Bahia state (IBUFRJ 12912, IBUFRJ 12916, respectively); F: shell from Pernambuco state (MNHN); G–J, K–M: shells from Rio de Janeiro state (G–J: MNRJ 15405; K–M: MNRJ 33388); I–J: body whorl and detail of teleoconch sculpture of shell in H; L–M: protoconch and detail of sculpture of shell in K; N: protoconch of shell from Espírito Santo State (MNRJ 16263). Lengths of whole shells: A–B: 2.1 mm; C: 2.1 mm; D: 2.2 mm; E: 2.2 mm; F: 2.0 mm; G: 2.0 mm; H: 2.1 mm; K: 2.3 mm. Scale bars: A–H, K: 1 mm; I–J: 200 µm; L–N: 100 µm. Horizontal line indicates that the two images are from the same shell.

Fig. 9 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 9 Anatomy of C. nechadae sp. nov., Regrag Spring, 44 km S-E of Fes city (type locality). a Ctenidium, b stomach, c partial nervous system; d–e female genitalia: d pallial oviduct, e bursa copulatrix and seminal receptacle; f–g male genitalia: f head with penis, g prostate gland

Fig. 2 a in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 2 a Geographic distributions of recovered clades, b maximum likelihood phylogeny based on the combination of mitochondrial COI and 16S and nuclear 28S gene fragments. Numbers above branches, provided above the species level, represent bootstrap support values (BS; BS> 30)

Fig. 13 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 13 Anatomy of C. atlasensis sp. nov., Sidi Mimoun Spring, near Awa Lake, Ifrane (type locality). a Ctenidium, b stomach; c–d female genitalia: c pallial oviduct, d bursa copulatrix and seminal receptacle; e–f male genitalia: e head with penis, f prostate gland

Fig. 14 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 14 Shells, opercula and radulae of C. wakrimi sp. nov., Spring in Douar Assoul, near Khenifra, Middle Atlas (type locality). a–d Shells, a, b holotype MHNM 18ZTMH49, e protoconch and f detailed

Fig. 5 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 5 Anatomy of C. marocana, Lahjar Spring, Essaouira (type locality). a Ctenidium, b stomach, c partial nervous system, d–e female genitalia: d pallial oviduct, e bursa copulatrix and seminal receptacle; f–h

Fig. 12 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 12 Shells, opercula and radulae of C. atlasensis sp. nov., Sidi Mimoun Spring, near Awa Lake, Ifrane (type locality). a–d Shells, a holotype MHNM 18ZTMH47, b paratype MHNM 18ZTMH48. e Inner

Fig. 4 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 4 Shells, opercula and radulae of C. marocana, Lahjar Spring, Essaouira (ype locality). a–d Shells, e protoconch and f detailed microsculpture of protoconch, g inner and h outer sides of operculum; i–k radulae: i portion of radular ribbon, j central tooth of radula, k inner and outer marginal teeth

Fig. 3 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 3 Time calibrated tree of Corrosella species obtained with *BEAST based on the combined dataset (COI, 16S and 28S) and the normal uncorrelated relaxed clock model. Blue bars on nodes represent the

Fig. 11 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 11 Anatomy of C. mahouchii sp. nov., Tizerdiouin Spring, Timdghasse, 40 km S-E of Khenifra (type locality). a Ctenidium, b stomach, c partial nervous system; d–e female genitalia: d pallial oviduct, e bursa copulatrix and seminal receptacle; f–g male genitalia: f head with penis, g prostate gland

Fig. 8 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 8 Shells, opercula and radulae of C. nechadae sp. nov. a–c Shells, Regrag Spring, 44 km S-E of Fes city (type locality), a holotype MNCN 15.05/200122H, d shell, Tadoute Spring, 70 km N-E Fes, e protoconch and f detailed microsculpture of protoconch, Regrag Spring, 44 km S-E of

Fig. 7 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 7 Anatomy of C. pallaryi. a Ctenidium, Ait Alla Spring, Middle Atlas; b stomach, Chebouka Spring near Miaami Lake, Middle Atlas; c partial nervous system, Spring near Chebouka River and Miaami Lake, Middle Atlas; d–e female genitalia, Chebouka Spring near Miaami Lake, Middle Atlas: d pallial oviduct, e bursa copulatrix and seminal receptacle, f–h male genitalia, Chebouka Spring near Miaami Lake, Middle Atlas: f head with penis, g prostate gland

Fig. 1 a in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 1 a Map of the Mediterranean region showing distributions of the Corrosella populations used in the molecular analyses, b detailed map of the Corrosella populations of southern Iberia. For locality codes, see Table 1 and Suppl. material 1: Table S1

Fig. 10 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 10 Shells, opercula and radulae of C. mahouchii sp. nov., Tizerdiouin Spring, Timdghasse, 40 km S-E of Khenifra (type locality). a–d Shells, a, b Holotype MNCN 15.05/200121H, e protoconch and f

Fig. 15 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 15 Anatomy of C. wakrimi sp. nov., spring in Douar Assoul, near Khenifra, Middle Atlas (type locality). a Ctenidium, b stomach, c partial nervous system; d–e female genitalia: d pallial oviduct, e bursa copulatrix

Fig. 6 in Hidden species diversity of Corrosella Boeters, 1970 (Caenogastropoda: Truncatelloidea) in the Moroccan Atlas reveals the ancient biogeographic link between North Africa and Iberia

Fig. 6 Shells, opercula and radulae of C. pallaryi. a–d Shells, a, b Chebouka Spring near Miaami Lake, Middle Atlas (type locality), c Ait Alla Spring, 5 km S-W of Miaami lake Middle Atlas, d Spring near Chebouka River and Miaami Lake, Middle Atlas, e protoconch and f detailed microsculpture of protoconch, g inner and h outer sides of