Figure 1
Megalobulimus dryadessp. nov., live specimen in the Atlantic Forest, Fazenda Intervales, São Miguel Arcanjo Municipality, São Paulo state (photo by B.M. Tomotani).
Figure 2
Shell of Megalobulimus dryades sp. nov.: (A-D) holotype (MZSP 120000, Iporanga, SP), (A) apertural view, (B) lateral view, (C) abapertural view, (D) apical view; C and D showing the shell measurements: L = length, W = width, H = height; (E-F) paratype (MZSP 29317, Iguape, SP), (E) apertural view, (F) abapertural view; (G-H) paratype (MZSP 28773, Iguape, SP), (G) apertural view, (H) abapertural view; (I) paratype (MZSP 15594), apical view of protoconch in SEM.
Figure 3
Megalobulimus dryadessp. nov. anatomy: (A) pulmonary (pallial) cavity, ventral-inner view showing collar vessel (cv), septum (se), heart (ht); (B) jaw, anterior view, left side damaged; (C) radula, central region in SEM.
Figure 4
Megalobulimus dryadessp. nov. anatomy: (A) pallial chamber, renopericardial region, ventral view; (B) pneumostome region, ventral view, inner lip or pneumostome deflected. Scale bars = 5 mm.
Figure 5
Megalobulimus dryadessp. nov. anatomy: (A) buccal mass opened longitudinally; (B) odontophore, dorsal view, radula and right muscles partially removed; (C) same, ventral view; (D) esophagus longitudinally opened, exposing its inner surface. Scale bars = 5 mm.
Figure 6
Megalobulimus dryadessp. nov. anatomy: (A) stomach, right view, opened longitudinally along dorsal surface; (B) same, left view; (C) intestine, transversally opened strip of its proximal region, inner surface exposed; (D) same, region of the pre-rectal valve; (E) same, rectum region. Scale bars = 5 mm.
Figure 4.
Megalobulimus dryades sp. nov. anatomy: (A) pallial chamber, renopericardial region, ventral view; (B) pneumostome region, ventral view, inner lip or pneumostome deflected. Scale bars = 5 mm.
Figure 7
Megalobulimus dryadessp. nov. anatomy: (A) genital system, complete dorsal view; (B) Carrefour region, ventral view; (C) albumen chamber opened, exposing its folds; (D) spermoviduct, cross-section at its middle region; (E) anterior region of genital ducts, lateral view; (F) same, opened longitudinally. Scale bars = 5 mm.
Figure 8
Megalobulimus dryadessp. nov. male structures: (A) penis and epiphallus, anterior view; (B) same, posterior view; (C) detail of epiphallus and its flagella; (D) penis and epiphallus opened longitudinally to expose their inner folds. Scale bars = 5 mm.
Figure 9
Megalobulimus dryadessp. nov. and M. gummatus in S-SE Brazil: Geographical distributions based on MZSP specimens. Megalobulimus dryades sp. nov. (circles; star indicating type locality, Iporanga) in south São Paulo state; M. gummatus (triangle) on the central coast of Rio de Janeiro state (type locality).
Figure 10
Shells of Megalobulimus gummatus: (A-C) holotype MNCN 1505/3199 (Rio de Janeiro), (A) apertural view, (B) lateral view, (C) abapertural view; (D-G) ANSP 428461 (Rio de Janeiro), (D) abapertural view, (E) lateral view, (F) apertural view, (G) protoconch; (H) MZSP 66800 (Arraial do Cabo, RJ), apertural view; (I-J) FMNH 216409 (Macaé, RJ, det. Bequaert, 1953), (I) apertural view, (J) protoconch. Arrows indicate location of spiral sulci.
Figure 11
Megalobulimus gummatus anatomy: (A) jaw; (B) radula, central region in SEM.
Figure 12
Megalobulimus gummatus anatomy: (A) pallial chamber, renopericardial region, ventral view; (B) pneumostome region, ventral view, inner lip or pneumostome deflected; (C) genital system, complete dorsal view; (D) anterior region of genital ducts, lateral view; (E) same, opened longitudinally; (F) Carrefour region, ventral view; (G) penis and epiphallus opened longitudinally. Scale bars = 5 mm.
Figure 13
Shells of Megalobulimus chionostoma: (A-C) MZSP 16582 (Corcovado, Rio de Janeiro, RJ, det. Morretes 1953Morretes, F.L. 1953. Adenda e corrigenda ao ensaio de catálogo dos moluscos do Brasil. Arquivos do Museu Paranaense , 10: 37-76.), (A) apertural view, (B) lateral view, (C) abapertural view; (D-F) FMNH 405 (Cantagalo, RJ), (D) apertural view, (E) lateral view, (F) protoconch.
Figure 14
Shells of Megalobulimus terrestris, M. oosomus and M. valenciennesii: (A-B) Megalobulimus terrestris MZSP 29322 (Agostina, PE), (A) apertural view, (B) abapertural view; (C-F) Megalobulimus oosomus, Holotype ANSP 32810 (Brazil), (C) apertural view, (D) lateral view, (E) abapertural view, (F) apical view; (G-H) Megalobulimus valenciennesii MZSP 28940 (Buerarema, BA), (G) apertural view, (H) abapertural view.