Sandy beach screw screw
| Sandy beach screw screw | ||||||||||||
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Housing of Hastula hectica |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Hastula hectica | ||||||||||||
| ( Linnaeus , 1758) |
The sandy beach screw auger ( Hastula hectica , frequent synonym : Impages hectica ) is a snail from the family of terebridae that the Indo-Pacific is widespread and polychaete (Polychaeta) eats.
features
Hastula hectica has a medium-sized, solid snail shell with 10 to 12 whorls, a pointed thread and a shiny surface, which in adult snails reaches 5 to 9 cm, often 7 cm in length. The seam is finely cut. Axially weak ribs run on the early whorls. The body is slightly rounded at the bottom, the mouth of the case at the base is wide and triangular. The spindle is smooth and almost straight, the fasciole with a central groove, and the rib at the base does not reach the spindle. The surface of the case is smooth and callous next to the seam. The color of the shell is grayish-yellow with a white stripe above the seam, pink-brown flames and stripes below.
distribution and habitat
Hastula hectica is common in the Indo-Pacific from the Red Sea and the coast of East Africa and Madagascar to eastern Polynesia , Japan , Hawaii and Australia ( Queensland ). In India it can be found on the coasts of Andhra Pradesh , Visakhapatnam and Tamil Nadu as well as on the Coromandel coast . It lives on sandy beaches that are directly exposed to coastal surf.
Development cycle
Like all screw snails , Hastula hectica is sexually separated, and the male mates with his penis . The Veliger larvae swim free before they sink and metamorphose into crawling snails .
nutrition
Hastula hectica feeds on sedentary , in the sand living Vielborstern (Polychaeta) family Spionidae , on sandy beaches of Hawaii Islands particular annelids the genus Scolelepis ( syn. Nerinides ). The prey is stabbed with a radula tooth , immobilized by injected poison and swallowed whole.
Importance to humans
Hastula hectica is particularly collected for its housing. It is of commercial importance on the Coromandel Coast .
literature
- Julita S. Imperial, Yuri Kantor, Meren Watkins, Francisco M. Heralde III, Bradford Stevenson, Ping Chen, Karin Hansson, Johan Stenflo, John-Paul Ownby, Philippe Bouchet, Baldomero M. Olivera (2007): Venomous Auger Snail Hastula ( Impages) hectica (Linnaeus, 1758): Molecular Phylogeny, Foregut Anatomy and Comparative Toxinology. Journal of Experimental Zoology (Mol Dev Evol) 208B, pp. 744-756.
- R. Venkitesan, AK Mukherjee (2012): Contribution to the knowledge on Indian marine molluscs: Family Terebridae. Records of the Zoological Survey of India 111 (3), pp. 49-77, here p. 58.
Web links
- Fischhaus Zepkow: Family Terebridae - screw snails
- Terebridae. From: JM Poutiers: Gastropods . In: Kent E. Carpenter, Volker H. Niem (Eds.): FAO Species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 1: Seaweeds, corals, bivalves and gastropods. Food and Agriculture Organization of the United Nations, Rome, 1998. pp. 629-636, here 635.
Individual evidence
- ↑ Bruce A. Miller (1979): The Biology of Hastula inconstans (Hinds, 1844) and a Discussion of Life History Similarities among other Hastulas of Similar Proboscis Type. Pacific Science 33 (3), pp. 289-306.