Rock drill

from Wikipedia, the free encyclopedia
Rock drill
Northern rock borer (Hiatella arctica)

Northern rock borer ( Hiatella arctica )

Systematics
Subclass : Heterodonta
Euheterodonta
Superordinate : Imparidentia
Order : Adapedonta
Superfamily : Hiatelloidea
Family : Rock drill
Scientific name
Hiatellidae
Gray , 1824

The rock borer (Hiatellidae) are a family of mussels . It is the only family in the superfamily Hiatelloidea. The (super) family has been reliably proven since the Hettangium ( Jura ). Even older finds from the Permian assigned to the family are doubtful.

Common rock borer ( Hiatella rugosa )

features

The equally or unevenly hinged housings are small to large. They are elongated-egg-shaped, rounded-rectangular or rounded-trapezoidal, or also somewhat irregular (shape due to the boring way of life). The rear end, and possibly also the front end, gape. The vertebrae sit near the front edge. The external ligament is sunk behind the vertebrae. The lock plate is narrow with one cardinal tooth in both flaps, but the teeth can be greatly reduced. Lateral teeth are missing.

The bowl is solid-walled and aragonitic . The outer shell layer is simple-prismatic, the middle layer homogeneous, the inner layer homogeneous or complex-cross-lamellar. The ornamentation consists of parallel, often somewhat irregular, more or less coarse lines and pits, and / or of a few, very strong, radial ribs that can be granular or spiked. The periostracum is thick.

The mantle bay is usually wide and deep. The surface line is irregular and interrupted. The two sphincters are unequal in size. The mostly long siphons are fused and surrounded by a cuticle. The ends of the siphons are free. A byssus may still be present.

Geographical distribution and habitat

The family is common around the world, but the focus of diversity is in the circumboreal waters.

They live attached to byssus, in crevices, small caves, in empty housings or as epibionts on algae and mollusc housings, or even drilling in soft rock or solidified sediment. The drilling is purely mechanical.

Taxonomy

The taxon was established by John Edward Gray in 1824 as Hyatelladae, based on the misspelling Hyatella Férussac, 1821. MolluscaBase accepts the taxon in the corrected form as a valid family (and superfamily).

supporting documents

literature

  • S. Peter Dance, Rudo von Cosel (arrangement of the German edition): The great book of sea shells. 304 p., Verlag Eugen Ulmer, Stuttgart, 1977 ISBN 3-8001-7000-0 (p. 272)
  • Rudolf Kilias: Lexicon marine mussels and snails. 2nd edition, 340 p., Verlag Eugen Ulmer, Stuttgart 1997 ISBN 3-8001-7332-8 (p. 139)
  • Raymond Cecil Moore (Ed.): Treatise on invertebrate paleontology. Mollusca, 6, Part N, Bivalvia 2. XXXVIII S., S.N491-951, New York, 1969 (S.N700-02).
  • Fritz Nordsieck : The European sea shells (Bivalvia). From the Arctic Ocean to Cape Verde, the Mediterranean Sea and the Black Sea. 256 p., Gustav Fischer Verlag, Stuttgart 1969 (p. 146)
  • Guido Poppe and Yoshihiro Goto: European Seashells Volume 2 (Scaphopoda, Bivalvia, Cephalopoda) . 221 pp., Verlag Christa Hemmen, Wiesbaden 1993 (2000 unc. Reprint), ISBN 3925919104 (p. 130)

Individual evidence

  1. ↑ Simon Schneider, Andrzej Kaim: Early Ontogeny of Middle Jurassic Hiatellids from a wood-fall association: implications for phylogeny and palaeoecology of Hiatellidae. Journal of Molluscan Studies, 78: 119-127, 2012. doi : 10.1093 / mollus / eyr048
  2. ↑ John Edward Gray: A supplement to the appendix of Captain Perry's voyage for the discovery of a northwest passage in the years 1819-1820, containing an account of the subjects of natural history. Appendix X. Natural history, shells. S.CCXL – CCXLVI, J. Murray, London, 1824 Online at www.biodiversitylibrary.org (S. CCXLI)
  3. ↑ MolluscaBase: Hiatellidae Gray, 1824
  4. ↑ Online at www.biodiversitylibrary.org (p. 179)

Web links

Commons : Felsenbohrer (Hiatellidae)  - Collection of images, videos and audio files