Benthofascis

Benthofascis is a genus of sea snails, marine gastropod mollusks in the family Conorbidae.[2][3][4][5]

Benthofascis
Drawing of a shell of Benthofascis atractoides.
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Family: Conorbidae
Genus: Benthofascis
Iredale, 1936[1]
Type species
Bathytoma biconica
Hedley, 1903

Like other species in the superfamily Conoidea these snails are predatory and venomous, able to inject neurotoxins into their prey with their radula.

This genus was previously included in the family Turridae (subfamily Conorbinae) [6] and later in the family Conidae.[7] In 2009 Tucker & Tenorio included it in the family Conorbidae.[8]

Species

The known living species within the genus Benthofascis are:

gollark: The stages of git clone are: Receive a "pack" file of all the objects in the repo database Create an index file for the received pack Check out the head revision (for a non-bare repo, obviously)"Resolving deltas" is the message shown for the second stage, indexing the pack file ("git index-pack").Pack files do not have the actual object IDs in them, only the object content. So to determine what the object IDs are, git has to do a decompress+SHA1 of each object in the pack to produce the object ID, which is then written into the index file.An object in a pack file may be stored as a delta i.e. a sequence of changes to make to some other object. In this case, git needs to retrieve the base object, apply the commands and SHA1 the result. The base object itself might have to be derived by applying a sequence of delta commands. (Even though in the case of a clone, the base object will have been encountered already, there is a limit to how many manufactured objects are cached in memory).In summary, the "resolving deltas" stage involves decompressing and checksumming the entire repo database, which not surprisingly takes quite a long time. Presumably decompressing and calculating SHA1s actually takes more time than applying the delta commands.In the case of a subsequent fetch, the received pack file may contain references (as delta object bases) to other objects that the receiving git is expected to already have. In this case, the receiving git actually rewrites the received pack file to include any such referenced objects, so that any stored pack file is self-sufficient. This might be where the message "resolving deltas" originated.
gollark: UPDATE: this is wrong.
gollark: > Git uses delta encoding to store some of the objects in packfiles. However, you don't want to have to play back every single change ever on a given file in order to get the current version, so Git also has occasional snapshots of the file contents stored as well. "Resolving deltas" is the step that deals with making sure all of that stays consistent.
gollark: A lot?
gollark: probably.

References
  1. Iredale T. (1936). "Australian molluscan notes. No. 2". Records of the Australian Museum 19(5): 267–340, plates 20–24. page 319.
  2. Bouchet, P. (2011). Benthofascis Iredale, 1936. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432414 on 2011-03-21
  3. Tucker J.K. & Tenorio M.J. (2009) Systematic classification of Recent and fossil conoidean gastropods. Hackenheim: Conchbooks. 296 pp., at pp. 134–135.)
  4. Bouchet P., Kantor Yu.I., Sysoev A. & Puillandre N. (2011) A new operational classification of the Conoidea. Journal of Molluscan Studies 77: 273–308.
  5. Tucker, J. K.; Tenorio, M. J.; Stahlschmidt, P. (2011), "The genus Benthofascis (Gastropoda: Conoidea): A revision with descriptions of new species", Zootaxa, 2796: 1, doi:10.11646/zootaxa.2796.1.1
  6. Powell, A.W.B. (1966) The molluscan families Speightiidae and Turridae an evaluation of the valid taxa, both Recent and fossil, with lists of characteristic species. Bulletin of the Aukland Institute and Museum, 5, 1–184, 23 pls.
  7. Taylor, J.D., Kantor, Yu.I. & Sysoev, A.V. (1993) Foregut anatomy, feeding mechanisms, relationships and classification of the Conoidea (= Toxoglossa) (Gastropoda). Bulletin of the Natural History Museum of London, Zoology, 59, 125–170
  8. Tucker, J.K. & Tenorio, M.J. (2009) Systematic Classification of Recent and Fossil Conoidean Gastropods, with Keys to the Genera of Cone Shells. ConchBooks, Hackenheim, Germany, 295 pp

Further reading
  • Sysoev, A. & Bouchet, P. 2001. New and uncommon turriform gastropods (Gastropoda: Conoidea) from the South-West Pacific. Mémoires du Muséum National d'Histoire Naturelle. Paris 185: 271–320
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