Anacithara axialis
Anacithara axialis is an extinct species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.[1]
| Anacithara axialis | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Clade: | Caenogastropoda |
| Clade: | Hypsogastropoda |
| Clade: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Horaiclavidae |
| Genus: | Anacithara |
| Species: | A. axialis |
| Binomial name | |
| Anacithara axialis (P. Marshall, 1918) | |
Description
Distribution
This extinct marine species occurred off New Zealand
gollark: I actually stole this particular quicksort from a r/haskell post talking about it.
gollark: ```lisp (let (partition_rec xs pred acc) (cond ((= xs '()) acc) (true (partition_rec (tail xs) pred (cond ((pred (head xs)) (list (cons (head xs) (head acc)) (snd acc))) (true (list (head acc) (cons (head xs) (snd acc)))) ))) )) (let (qsort xs cont) (cond ((= xs '()) (cont '())) (true (do (let h (head xs)) (let t (tail xs)) (let part_result (partition_rec t (lambda (x) (< x h)) '(() ()))) (qsort (head part_result) (lambda (ls) (qsort (snd part_result) (lambda (rs) (cont (+ ls (list h) rs)))))) )) ))```These all have to be done tail recursively or it could overflow.
gollark: Continuation passing style quicksort in a hilariously slow interpreter.
gollark: It manages *1* second, which is great.
gollark: When writing osmarkslisp™, I cared about performance to the extent that it would sort a list of 200 integers in under 5 seconds.
References
- Marshall, B. (2015). Anacithara axialis (P. Marshall, 1918) †. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=831535 on 2016-12-22
- Marshall, Patrick. "The Tertiary molluscan fauna of Pakaurangi Point, Kaipara Harbour." Transactions and Proceedings of the New Zealand Institute. Vol. 50. 1918.
- Maxwell, P.A. (2009). Cenozoic Mollusca. pp. 232–254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch.
External links
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