Dardo (malacologia)
1 = base do dardo com barbelas
2 = posição da cavidade interna
3 = flanges longitudinais
4 = ponta aguçada ou lâmina do dardo
Dardo, dardo de amor ou gipsobelo (em latim telum amoris ou gypsobelum) é a designação dada em malacologia a um pequeno estilete em forma de dardo, constituído por carbonato de cálcio ou quitina, que é produzido por algumas espécies de gastrópodes terrestres hermafroditas como parte do seu aparelho reprodutor. Imediatamente antes da cópula o dardo é inserido, por contacto e pressão, na carne do parceiro, contribuindo para o tornar mais receptivo ao esperma, pois o doador usa o dardo para injectar no receptor uma mucusidade contendo hormonas que estimulam os órgãos genitais femininos.[1]
Notas
Referências[editar | editar código-fonte]
- Chase, R and Vaga, K (2005) Independence, not conflict, characterizes dart-shooting and sperm exchange in a hermaphroditic snail Journal Behavioral Ecology and Sociobiology, 59(6):732-739. Preview
- Chase, R (2007) Gastropod reproductive behavior Scholarpedia, 2(9):4125
- Chung DJD (1986) Initiation of growth of the first dart in Helix aspersa Journal of Molluscan Studies, 52:253–255.
- Davison, A; Wade, CM; Mordan, PB and Chiba, S (2005) Sex and darts in slugs and snails (Mollusca: Gastropoda: Stylommatophora) Journal of Zoology, 267 : 329-338. Cambridge University Press.
- Hunt S.: The structure and composition of the love dart (gypsobelum) in Helix pomatia.. Tissue Cell. 1979; 11(1): 51-61.
- Koene, JM and Schulenburg, H (2005) Shooting darts: co-evolution and counter-adaptation in hermaphroditic snails BMC Evolutionary Biology, 5:25
- Koene, JM and Chiba, S (2006) The way of the samurai snail American Naturalist, 168(4):553-5. Download
- Koene, JM (2006) Tales of two snails: sexual selection and sexual conflict in Lymnaea stagnalis and Helix aspersa Integrative and Comparative Biology, 46(4):419-429,
- Landolfaa, MA; Greena, DM and Chase, R (2001) Dart shooting influences paternal reproductive success in the snail Helix aspersa (Pulmonata, Stylommatophora) Behavioral Ecology, 12(6):773-777. Download Lay summary
- Leonard, JL (2006) Sexual selection: lessons from hermaphrodite mating systems Integrative and Comparative Biology, 46(4):349-367. Download
- Michiels, N (2006) Battle of the hermaphrodites: sexes clash even when sharing the same body Science News, 16 Sep 2006.
- Pomiankowskia, A and Reguera, P (2001) The point of love Ecology & Evolution. 16(10)533-534.
- Roth, B. (1996) Homoplastic loss of dart apparatus, phylogeny of the genera and a phylogenetic taxonomy of the Helminthoglyptidae (Gastropoda: Pulmonata). Veliger 39, 18–42.
Ligações externas[editar | editar código-fonte]
- José L Díaz; Julio C Aguirre; Gregory Mejía S,; Eduardo Martínez G, "Reproducción y genética del Caracol Terrestre Helix aspersa"[ligação inativa]
- Davidson A. (Last updated 17 August 2007) 2007. The snail mating behaviour database. Molluscs.org: The web page of Angus Davison. Data. 7 pp.
- Lovebirds and Love Darts: The Wild World of Mating National Geographic News: Valentine's Day Special Report, 13 February 2004.
- The Roman Snail: Mating and Copulation (Robert Nordsieck)
- A dart in the dark
- Snail darts A moment of science.
- Love that love dart
- Cupid myth influenced by snails?
- Snail-Sex: How do they do it?
- The evolution of love darts and shooting behaviour in land snails
- Love Darts in the Backyard
- Shot Through the Head, for a Reason New York Times, 6 June 2006.