Lumache

Lumache d’acqua dolce e salmastra

Qui di seguido alcune schede create da studiosi appassionati e studiosi accademici sulle lumache di acqua dolce e salmastre eurialine, cioè che possono vivere anche in acqua dolce per periodi non ancora ben definibili. Sono solo alcune delle più diffuse e commercializzate nel mondo dell’acquariofilia, ne esistono moltissime altre e continuamente vengono revisionate le denominazioni (perchè erroneamente identificate, o per errata denominazione anche da parte di accademici e studiosi, o studi scientifici). Questo può rendere difficoltosa una reale identificazione, e spesso il nome comune è più stabile nel tempo del nome scientifico.

Shells of analysed species. (A) Lepidochitona cinerea, (B) Rochia conus, (C) Astralium calcar, (D) Monetaria annulus, (E) Clithon corona, (F) Vittina turrita, (G) Stenomelania torulosa, (H) Thiara cancellata, (I) Brotia herculea, (J) Taia naticoides and (K) Marisa cornuarietis. Scale bars: A, 5 mm; B, 60 mm; C, 25 mm; D, 20 mm; E, 12 mm; F,G,I,J, 30 mm; H,K,15 mm.

Shells of analysed species. (A) Lepidochitona cinerea, (B) Rochia conus, (C) Astralium calcar, (D) Monetaria annulus, (E) Clithon corona, (F) Vittina turrita, (G) Stenomelania torulosa, (H) Thiara cancellata, (I) Brotia herculea, (J) Taia naticoides and (K) Marisa cornuarietis. Scale bars: A, 5 mm; B, 60 mm; C, 25 mm; D, 20 mm; E, 12 mm; F,G,I,J, 30 mm; H,K,15 mm.

Freshwater molluscs in the ornamental pet trade. Unless indicated differently, scale bars = 10mm. 1. Batissa similis; 2. Batissa violacea; 3. Corbicula fluminea; 4. Corbicula moltkiana; 5. Hyriopsis bialata; 6. Hyriopsis desowitzi; 7. Parreysia burmana; 8. Parreysia tavoyensis; 9. Pilsbryoconcha exilis; 10. Scabies crispata; 11. Sinanodonta woodiana; 12. Unionetta fabagina; 13. Marisa cornuarietis; 14. Pomacea canaliculata; 15. Pomacea diffusa; 16. Pomacea maculata (photograph by K.A. Hayes); 17. Bithynia sp.; 18. Clea bockii; 19. Clea helena; 20. Radix rubiginosa; 21. Clithon corona; 22. Clithon diadema; 23. Clithon lentiginosum; 24. Clithon mertoniana; 25. Neripteron auriculata; 26. Neritina iris; 27. Neritina juttingae; 28. Neritina violacea; 29. Neritodryas cornea; 30. Septaria porcellana; 31. Vittina coromandeliana; 32. Vittina turrita; 33. Vittina waigiensis; 34. Brotia armata; 35. Brotia binodosa; 36. Brotia herculea; 37. Brotia pagodula; 38. Sulcospira tonkiniana; 39. Tylomelania towutica; 40. Tylomelania sp.; 41. Tylomelania sp.; 42. Tylomelania sp.; 43. Physa sp.; 44. Amerianna carinata; 45. Indoplanorbis exustus; 46. Gyraulus convexiusculus; 47. Semisulcospira sp.; 48. Melanoides tuberculata; 49. Stenomelania offachiensis; 50. Stenomelania plicaria; 51. Stenomelania cf. plicaria; 52. Stenomelania sp.; 53. Thiara cancellata; 54. Celetaia persculpta; 55. Filopaludina cambodjensis; 56. Filopaludina peninsularis; 57. Filopaludina polygramma; 58. Sinotaia guangdungensis; 59. Taia pseudoshanensis.

Freshwater snails collected from Mae Lao agricultural basin: (A) Trochotaia trochoides; (B) Filopaludina doliaris; (C) F. martensi martensi; (D) F. sumatrensis polygramma; (E) Bithynia funiculata; (F) B. siamensis goniomphalos; (G) B. s. siamensis; (H) Pomacea canaliculata; (I) Clea helena; (J) Melanoides tuberculata; (K) Lymnaea auricularia; (L) Corbicula javanica. Scale bar=0.5 cm.

The shells of 14 snail taxa collected in this study. (A) Bithynia siamensis. (B) Gyraulus sp. (C) Indoplanorbis exustus. (D) Lymnaea auricularia. (E) Clea helena. (F) Tarebia granifera. (G) Thiara scabra. (H) Melanoides tuberculata. (I) Pomacea sp. (J) Filopaludina doliaris. (K) Sinotaia sp. (L) Filopaludina speciose. (M) Filopaludina martensi. (N) Filopaludina polygramma.

Physa acuta from Thailand and Laos, and the ornamental trade. Thailand: A. Nong Khai province, B. Phang-Nga province, C. Chiang Mai province, D. Phetchabun province, E. Nakhon Phanom province, F. Suphanburi province, G. Phitsanulok province and H. Nakhon Sawan province. Laos: I. Vientiane province and J. Khammouane province. K. Hitchhiker among aquatic plants sold in an ornamental pet shop in Bangkok, Thailand. Scale bar = 1 mm. Photographs by Ting Hui Ng and Phirapol Chusongsang.

Shells of pond snails found. A – Lymnaea stagnalis from locality 16; B – L. fragilis, locality 7; C – Stagnicola corvus, locality 8; D – Galba truncatula, locality 21; E – G. subangulata, locality 16; F – G. oblonga, locality 4; G, H – Ladislavella terebra, loc. 17; I – Radix auricularia, locality 3; J, K – R. parapsilia, locality 10; L – R. ampullаcea, locality 3; M – R. balthica, locality 2; N – R. intermedia, locality 4; O – R. ampla, locality 15; P – R. tumida, locality 15. Scale bar = 10 mm for A–C and 5 mm for D–P.
Variability in Radix balthica shells: 1 Germany, Baden-Württemberg, river Danube near Sigmaringendorf (Sig-1); 2 France, Region Centre, Thenay (Th-1); 3 Kazakhstan, lake Kopa (Ko-2); 4 Germany, Saxony, creek Geberbach near Kauscha (Kau); 5 Germany, Bavaria, river Amper near lake Ammersee (Am-1); 6 Germany, Saxony, Dresden-Kleizschachwitz, river Elbe (DD-2); 7 Switzerland, canton Basel City, Riehen, Wiesengriener (Rie-1); 8 Switzerland, canton Basel City, Riehen, Wiesengriener (Rie-2); 9 Switzerland, canton Basel-Landschaft, Liestal, Orishof (Lie-1); 10 Germany, Mecklenburg-Vorpommern, lake Torgelower See (Tor-2); 11 Germany, Mecklenburg-Vorpommern, lake Tiefwarensee (Tie-1); 12 Germany, North Rhine-Westphalia, Hillegossen, creek Meyerbach (Hi-1).

Melanoides tuberculata morphs included in this study, numbers in subscript following the morph names refer to populations. (A) Morph LMN1, Nkhata Bay, Lake Malawi, collector and date MG 2002. (B) LMN2, Cape Maclear, Lake Malawi, MG 2002. (C) Morph LMN3, Mkungula, Lake Malombe, MG 2002. (D) LIS, Lisuli Dam, Chikwawa, Malawi, MG 2002. (E) MAY, Mayotte, Comores Archipelago J-PP 2000. (F) SOM, Eil Spring, Somalia, Tim Fison 1992 via David Brown, BM(NH). (G) ISR, Ilan, Israel. Joseph Heller 1993. (H) VIC, Mwanza Gulf, Lake Victoria, FW 2002. (I) LMI1, Kambiri Point, Lake Malawi, MG 2002. (J) LMI2, Cape Maclear, Lake Malawi, MG, 2002. (K) LMI3, Mkungula, Lake Malombe, MG 2002. (L) LMI4, Makakola, Lake Malawi, EM 1999. (M) BAN, Pathun Tani, Bangkok, Thailand, J-PP 1998. (N) SRI, Kandalama Lake, Dambulla, Sri Lanka, NdV 2003. (O) PAN, Pandan Reservoir, Singapore, MG 2003. (P) LSD, Lower Selatar Drain, Singapore, MG 2003. (Q) USR, Upper Selatar Reservoir, Singapore, MG 2003. (R) LSR, Lower Selatar Reservoir, Singapore, MG 2003. (S) LSS, Lower Selatar Reservoir, Singapore, MG 2003. (T) NAP, Napier Road, Singapore, MG 2003. (U) Outgroup, Thiara amarula, Mayotte, Comores Archipelago, J-PP 2000.

Pomacea bridgesii, P. scalaris, and P. diffusa. a: P. bridgesii from Brazil; b: P. scalaris from Brazil; c: P. diffusa from Australia; d: P. scalaris from Taiwan. Bar = 1 cm.
A shell of Pomacea maculata in the Muséum National d’Histoire Naturelle, Paris. Shell height ~17 cm.
Egg masses of introduced and native Pomacea in the continental U.S. a. P. haustrum, b. P. diffusa, c. P. canaliculata, d. P. paludosa, e. P. insularum. Scale Bar:5 cm.
Maturation of Pomacea paludosa eggs. Maturation from freshly laid salmon colored eggs in a thick mucus matrix (left), to the mature pinkish white eggs in calcified shells (right). Scale Bar: 5 cm.

L’intero articolo è stato redatto per il sito AqaZero.it da Corrado; foto riprese da vari articoli scientifici prima foto di Carolin Scheel, Stanislav N. Gorb, Matthias Glaubrecht and Wencke Krings; è vietata la riproduzione senza citare la fonte.