Malandena suturalis ( Odhner, 1917 )

Hyman, Isabel T. & Ponder, Winston F., 2010, A morphological phylogenetic analysis and generic revision of Australian Helicarionidae (Gastropoda: Pulmonata: Stylommatophora), and an assessment of the relationships of the family 2462, Zootaxa 2462 (1), pp. 1-148 : 67-68

Malandena suturalis ( Odhner, 1917)

Figures 19K , 20J , 21K , 22E , 24A , 25A–C

Macrochlamys suturalis Odhner, 1917: 81 , figs 35b, 36–38.

Macrochlamys suturalis depressa Odhner, 1917: 81 .

Malandena suturalis: Iredale, 1933: 56 ; Iredale, 1937c: 7; Smith, 1992: 236.

Synonymy follows Smith (1992).

Material examined. Queensland, Australia: AM C425087 (one shell measured, photographed), Atherton Tableland, near Peeramon (17º18.7' S, 145º38' E), under timber in disturbed rainforest, 27 Jan. 1974, I. Loch ; AM C425085 (two specimens dissected, one radula examined); Atherton Tablelands at Curtain Fig Tree, off Gillies Hwy (17º17' S, 145º14' E), under vesicular basalt rocks and wood, complex notophyll vine forest, 29 Sept. 1980, W.F. Ponder, I. Loch, J. Stanisic .

Description. External morphology: Shell ( Figures 19K , 20J , 21K ) of about 4.8 whorls, pale golden brown; shape and sculpture as for genus. Animal pale cream. Mantle laps and lobes as for genus. Caudal horn long and overhanging foot; caudal foss vertical slit in tail.

Mantle cavity and digestive system: As for genus.

Genital system ( Figures 22E , 24A ): As for genus. Penis very short; epiphallus enters penis through simple pore; penis internally smooth, one major longitudinal penis pilaster and approximately ten minor longitudinal pilasters present. Epiphallus much longer than penis; internally with longitudinal pilasters. Epiphallic retractor caecum absent.

Radula ( Figure 25A–C ): As for genus. Radular formula (37.12.1.12.37) × 100 rows.

Range and habitat. Malandena suturalis is found from Cardwell Range to Thornton Peak, N of Mossman, N Queensland, in scrub, complex mesophyll to notophyll vine forest and rainforest. Specimens are usually found under logs, rocks and other debris on the ground.

Remarks. The genitalia figured by Odhner (1917) agree with the observations of the current study, except that he misidentified the bursa copulatrix as the ‘dart sac’. The subspecies described by Odhner (1917), Malandena suturalis depressa ( Odhner, 1917) , is synonymised with M. suturalis following Smith (1992) but it was not confirmed as the type specimens were not examined.

Figures

FIGURE 19. Shells, dorsal view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Eungarion mcdonaldi, QMMO35628. D. Parmacochlea fischeri, AM C432179. E. Nitor circumcincta, AM C104161 (POS of Helix marmorata). F. Nitor subrugata, AM C333711. G.Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). H. Pravonitor kreffti, BMNH no number (POS). I. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). J. Expocystis rustica, BMNH 1982243 (POH of Helix villaris). K. Malandena suturalis, AM C425087. Scale bars 3 mm (E, J), 5 mm (A–D, F–I, K). Photographs by H. Barlow (A, D, F, I), D. Beechey (E, G), I. Hyman (K), W. Ponder (B, H, J), copyright Australian Museum; photographer unknown, copyright Queensland Museum (C). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.

FIGURE 20. Shells, lateral view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Parmacochlea fischeri, AM C432179. D. Nitor circumcincta, AM C104161 (H). E. Nitor subrugata, AM C333711. F. Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). G. Pravonitor kreffti, BMNH no number (POS). H. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). I. Expocystis rustica, BMNH 1982243 (POH of Helix villaris). J. Malandena suturalis, AM C425087. Scale bars 3 mm (A, D, I), 5 mm (B–C, E–H, J). Photographs by H. Barlow (A, C, E, H), D. Beechey (D, F), W. Ponder (B, G, I), I. Hyman (J). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.

FIGURE 21. Shells, ventral view. A. Stanisicarion freycineti, AM C391188. B. Stanisicarion virens, BMNH 197776 (S). C. Eungarion mcdonaldi, QMMO35628 (H). D. Parmacochlea fischeri, AM C432179. E. Nitor circumcincta, AM C104161 (H). F. Nitor subrugata, AM C333711. G. Nitor subrugata, AM C63479 (S of N. subrugata helmsianus). H. Pravonitor kreffti, BMNH no number (POS). I. Pravonitor kreffti, AM C29647 (H of P. kreffti insularum). J. Expocystis rustica, BMNH1982243 (POH of Helix villaris). K. Malandena suturalis, AM C425087. Scale bars 3 mm (A, E, J), 5 mm (B–D, F–I, K). Photographs by H. Barlow (A, D, F, I), D. Beechey (E, G), I. Hyman (K), W. Ponder (B, H, J), copyright Australian Museum; photographer unknown, copyright Queensland Museum (C). Abbreviations: H, holotype; POH, possible holotype; POS, possible syntype; S, syntype.

FIGURE 22. Penis interiors. A. Nitor circumcincta, AM C356607. B. Nitor subrugata, AM C334537. C. Pravonitor kreffti, AM C425415. D. Expocystis rustica, AM C425540. E. Malandena suturalis, AM C425085. F. Echonitor cyrtochila, SAM D16557. G. Echonitor albumenoidea, SAM D16567. H. Periclocystis ardeni, SAM D16562. I. New Caledonian NC3, MNHN no registration number. J. New Caledonian NC5, MNHN no registration number. K. Caldwellia angularis, AM C205299. L. Caldwellia imperfecta, AM C205300. Scale bars 1 mm (A–L). Abbreviations: ep, epiphallus; pd, penial diverticulum; pp, penial pilaster; ppd, diamond-shaped, ridged pustules; prm, penis retractor muscle; ppu, penial pustules; pv, penial verge.

FIGURE 24. Reproductive systems. A. Malandena suturalis, AM C425085. B. Westracystis lissus, FMNH 211717. C. Echonitor cyrtochila, SAM D16557. D. Echonitor albumenoidea, SAM D16567. E. Periclocystis ardeni, SAM D16562. F. Tarocystis responsivus, AM C425327. G. New Caledonian species NC3, MNHN no registration number. H. New Caledonian species NC5, MNHN no registration number. Scale bars 1 mm (C, G), 2 mm (A–B, D–F, H). Abbreviations: alb, albumen gland; bc, bursa copulatrix; c, caecum; ep, epiphallus; fl, flagellum; fov, free oviduct; her, hermaphrodite duct; m, muscle attaching penial sheath to epiphallus (only shown in D & G); ov, ovotestis; p, penis; pr, prostate; prm, penis retractor muscle; pt, penial sheath; t, talon; ut, uterus; v, vagina; vd, vas deferens.

FIGURE 25. Radulae. SEM. A–C. Malandena suturalis, AM C425085. D–F Westracystis lissus, AM C205297. G–I. Echonitor albumenoidea, SAM D16567. J–L. Tarocystis responsivus, AM C425327. M–O. New Caledonian species NC3, MNHN no registration number. P–R. New Caledonian species NC5, MNHN no registration number. Scale bars 20 mm (A–R).