The genus Bostryx in central western Argentina: anatomical and distributional description of four of its southernmost species (Gastropoda, Bulimulidae)

The genus Bostryx Troschel, 1847 is endemic to South America, extending from Ecuador to Chile and Argentina. The southernmost Argentinian species of the genus that inhabit San Luis, San Juan and Mendoza provinces, specially the pre-Andes, Andes and Sierras Pampeanas mountain ranges, were examined. This is the first time the anatomy of Bostryx pastorei (Holmberg, 1912), Bostryx reedi (Parodiz, 1947) and Bostryx strobeli (Parodiz, 1956) has been described.Bostryx cordillerae (Strobel, 1874) is re-described regarding shell and anatomy due to new morphological data. The main differences among the species examined are based on shell characters. The distribution ofBostryx mendozanus (Strobel, 1874) and Bostryx cuyanus (Pfeiffer, 1867), other species found in this region, was also discussed.

KEYWORDS
Stylommatophora; Precordillera; Sierras Pampeanas; systematics

Authorship

María José Miranda

Instituto de Biodiversidad Neotropical, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Tucumán (UNT), Facultad de Ciencias Naturales, Miguel Lillo 205, 4000 Tucumán, Argentina. (mirandamjo@hotmail.com)Universidad Nacional de TucumánArgentinaTucumán, Argentina Instituto de Biodiversidad Neotropical, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Tucumán (UNT), Facultad de Ciencias Naturales, Miguel Lillo 205, 4000 Tucumán, Argentina. (mirandamjo@hotmail.com)

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (11)
Tables (2)

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Figs 1-5
Measurements of the shell: 1, 2, linear measurements; 3, total shell perimeter; 4, spire and body whorl perimeter; 5, aperture perimeter.

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Fig. 6
Geographical distribution of the southernmost Argentinian species of the genus Bostryx (Gastropoda, Bulimulidae).

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Figs 7-8
Bostryx reedi (Parodiz, 1947). 7, holotype (MACN 10001) in ventral, dorsal and laterals view; 8, size and shape variation of shells (MCNL 1116) (scale bar: 1 cm).

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Figs 9-11
Bostryx reedi (Parodiz, 1947). 9, general view of the protoconch and 3 first whorls (scale bar: 200 µm); 10, 11, detail of sculpture of protoconch (scale bar: 100 and 20 µm, respectively).

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Figs 12-14
Bostryx reedi (Parodiz, 1947). 12, View of dissected reproductive system; 13, phallic complex without penial sheat; 14, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

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Figs 15-17
Bostryx pastorei (Holmberg, 1912). Shells in ventral, dorsal and lateral view: 15, lectotype (MACN 1517); 16, IFML 15573; 17, MACN 9917. (Scale bar: 5 mm).

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Figs 18, 19.
Bostryx pastorei (Holmberg, 1912). 18, View of dissected reproductive system; 19, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

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Figs 20, 21.
Bostryx strobeli (Parodiz, 1956). 20, Holotype (MACN 9916) in ventral, dorsal and laterals view; 21, size and shape variation of shells (MLP 11010, MACN 27283, MLP 11018) (scale bar: 1 cm).

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Figs 22, 23.
Bostryx strobeli (Parodiz, 1956). 22, View of reproductive system dissected out; 23, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor mucle of penial sheath; S, spermoviduct; V, Vagina; VD, vas deferens).

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Figs 24-27
Bostryx cordillerae (Strobel, 1874). 24, 25, Size and shape variation of shells (IFML 15580, MACN 12114) (scale bar: 1 cm); 26, general view of protoconch (scale bar: 100 μm); 27, detail of protoconch's sculpture (scale bar: 20 μm).

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Figs 28, 29.
Bostryx cordillerae (Strobel, 1874). 28, View of reproductive system dissected out; 29, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; V, vagina; VD, vas deferens).

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Tab. I
Shell measurements (ad, shell apertural diameter; ah, shell apertural height; bwh, body whorl height; masd, major diameter of the shell; misd, minor diameter; psl, parietal space length; pwd, penultimate whorl major diameter; pwh, penultimate whorl height; sh, spire height; tsh, shell height).

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Tab. II
Shell measurements (n, number of measured specimens; SD, standard deviation; Min., minimum; Max., maximum; Mean, average).

Figs 1-5 Measurements of the shell: 1, 2, linear measurements; 3, total shell perimeter; 4, spire and body whorl perimeter; 5, aperture perimeter.

Fig. 6 Geographical distribution of the southernmost Argentinian species of the genus Bostryx (Gastropoda, Bulimulidae).

Figs 7-8 Bostryx reedi (Parodiz, 1947). 7, holotype (MACN 10001) in ventral, dorsal and laterals view; 8, size and shape variation of shells (MCNL 1116) (scale bar: 1 cm).

Figs 9-11 Bostryx reedi (Parodiz, 1947). 9, general view of the protoconch and 3 first whorls (scale bar: 200 µm); 10, 11, detail of sculpture of protoconch (scale bar: 100 and 20 µm, respectively).

Figs 12-14 Bostryx reedi (Parodiz, 1947). 12, View of dissected reproductive system; 13, phallic complex without penial sheat; 14, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

Figs 15-17 Bostryx pastorei (Holmberg, 1912). Shells in ventral, dorsal and lateral view: 15, lectotype (MACN 1517); 16, IFML 15573; 17, MACN 9917. (Scale bar: 5 mm).

Figs 18, 19. Bostryx pastorei (Holmberg, 1912). 18, View of dissected reproductive system; 19, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

Figs 20, 21. Bostryx strobeli (Parodiz, 1956). 20, Holotype (MACN 9916) in ventral, dorsal and laterals view; 21, size and shape variation of shells (MLP 11010, MACN 27283, MLP 11018) (scale bar: 1 cm).

Figs 22, 23. Bostryx strobeli (Parodiz, 1956). 22, View of reproductive system dissected out; 23, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor mucle of penial sheath; S, spermoviduct; V, Vagina; VD, vas deferens).

Figs 24-27 Bostryx cordillerae (Strobel, 1874). 24, 25, Size and shape variation of shells (IFML 15580, MACN 12114) (scale bar: 1 cm); 26, general view of protoconch (scale bar: 100 μm); 27, detail of protoconch's sculpture (scale bar: 20 μm).

Figs 28, 29. Bostryx cordillerae (Strobel, 1874). 28, View of reproductive system dissected out; 29, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; V, vagina; VD, vas deferens).

Tab. I Shell measurements (ad, shell apertural diameter; ah, shell apertural height; bwh, body whorl height; masd, major diameter of the shell; misd, minor diameter; psl, parietal space length; pwd, penultimate whorl major diameter; pwh, penultimate whorl height; sh, spire height; tsh, shell height).

Tab. II Shell measurements (n, number of measured specimens; SD, standard deviation; Min., minimum; Max., maximum; Mean, average).

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The genus Bostryx in central western Argentina: anatomical and distributional description of four of its southernmost species (Gastropoda, Bulimulidae)

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