Editing Ancistrocheirus

{{Short description|Genus of squids}}
{{Speciesbox
| name = Sharpear enope squid
| image = Ancistrocheirus lesueurii.jpg
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name=IUCN>{{Cite iucn | author = Allcock, L. | author2 = Barratt, I. | name-list-style=amp| title = ''Ancistrocheirus lesueuri'' | volume = 2014 | page = e.T163050A966613 | date = 2014 | doi = 10.2305/IUCN.UK.2014-1.RLTS.T163050A966613.en }}</ref>
| grandparent_authority = [[Georg Johann Pfeffer|Pfeffer]], 1912
| genus = Ancistrocheirus
| parent_authority = [[John Edward Gray|Gray]], 1849
| display_parents = 3
| species = lesueurii
| authority = ([[Alcide d'Orbigny|D'Orbigny]], 1842)<ref name = WoRMS>{{cite web | url = http://www.marinespecies.org/aphia.php?p=taxdetails&id=138747 | title = ''Ancistrocheirus lesueurii'' (d'Orbigny [in Férussac & d'Orbigny], 1842) | accessdate = 24 February 2018 | publisher = Flanders Marine Institute | author = Julian Finn | year = 2016 | work = World Register of Marine Species}}</ref>
| synonyms = *''Abralia megalops'' <small>[[Addison Emery Verrill|Verrill]], 1882</small>
*''Ancistroteuthis lesueurii'' <small>(d'Orbigny, 1842)</small>
*''Enoploteuthis lesueurii'' <small>d'Orbigny, 1842</small>
*''Enoploteuthis pallida'' <small>[[Georg Johann Pfeffer|Pfeffer]], 1884</small>
*''Enoploteuthis polyonyx'' <small>[[Franz Hermann Troschel|Troschel]], 1857</small>
*''Loligo alessandrinii'' <small>[[Jean Baptiste Vérany|Vérany]], 1847</small>
*''Onychia caribaea'' <small>[[Japetus Steenstrup|Steenstrup]], 1880</small>
*''Onychoteuthis lesueurii'' <small>[[André Étienne d'Audebert de Férussac|Férussac]], 1835</small>
*''Thelidioteuthis alessandrinii'' <small>(Vérany, 1847)</small>
*''Ancistrocheirus alessandrinii'' <small>(Verany, 1851)</small><ref>{{cite magazine |magazine=VELIGER |publisher=California Malacozoological Society, Inc. |url=https://www.biodiversitylibrary.org/page/42467207 |location=Berkeley, California |volume=35 |date=1 April 1992 |title=On the Validity, Authorship, and Publication Date of the Specific Name ''Ancistrocheirus lesueurii'' (Cephalopoda: Ancistrocheiridae) |author=Giambattista Bello |page=142 |via=[[Biodiversity Heritage Library]] |quote=''Ancistrocheirus alessandrinii'' (Verany, 1851)" and "''Ancistrocheirus lesueri'' Ferussac & d'Orbigny, 1839" accepted by NESIS (1978:448; 1987:181) are herein considered to be synonymous.}}</ref>
| synonyms_ref = <ref name = WoRMS/>
}}

'''''Ancistrocheirus lesueurii''''', the '''sharpear enope squid''', is the only species in the genus '''''Ancistrocheirus''''' and family '''Ancistrocheiridae'''.  With a mantle length of {{convert|25|cm|abbr=on}}, this moderately sized [[squid]] may be found throughout the [[tropical]] and [[subtropical]] oceans.  They tend to be found at [[mesopelagic]] depths ({{convert|200-1000|m|abbr=on}} down).

Although only one species is recognized, some have suggested more than one species may exist due to differences in the [[paralarva]]l [[Morphology (biology)|morphology]].  Paralarva is the first free-living stage for [[cephalopod]]s.

==Characteristics==
The buccal crown of the sharpear enope squid is heavily pigmented.  The squid has no [[vesicle (biology)|vesicle]]s. There are hooks on all its [[cephalopod arm|arm]]s.  The [[Sucker (cephalopod anatomy)|sucker]]s are absent from its manus and the squid's [[dactylus]] is reduced.

===Photophores===
[[Photophore]]s occur throughout its body.  Large photophores are present on its head, funnel, base of arms, and [[tentacular]] stalk.  Other photophores are present on the ventral surface of its [[mantle (mollusc)|mantle]] (usually 22), with numerous very small photophores on its head, funnel, base of arms II and tentacular stalk.  Mature males have large photophores on tips of arms IV opposite the mouth.  Mature females have photophores on tips of their [[Dorsum (biology)|dorsal]] six arms. The number of large photopores on the squid's mantle increases as it matures.

==Ecology==
They are eaten by the [[sperm whale]] in [[Southeast Asia]] and the [[Galapagos]] waters<ref>{{cite journal |last1=Chua |first1=Marcus A.H. |last2=Lane |first2=David J.W. |last3=Ooi |first3=Seng Keat |last4=Tay |first4=Serene H.X. |last5=Kubodera |first5=Tsunemi |title=Diet and mitochondrial DNA haplotype of a sperm whale (''Physeter macrocephalus'') found dead off Jurong Island, Singapore |journal=PeerJ |date=5 April 2019 |volume=7 |pages=e6705 |doi=10.7717/peerj.6705|pmc=6452849 |pmid=30984481 |doi-access=free }}</ref><ref>{{cite journal |last1=Smith |first1=Sean C. |last2=Whitehead |first2=Hal |title=The diet of Galapagos sperm whales ''Physeter macrocephalus'' as indicated by fecal sample analysis |journal=Marine Mammal Science |date=April 2000 |volume=16 |issue=2 |pages=315–325 |doi=10.1111/j.1748-7692.2000.tb00927.x|bibcode=2000MMamS..16..315S }}</ref>

==References==
{{Reflist}}
{{CephBase Species|278}}
*[http://tolweb.org/tree?group=Ancistrocheirus%20lesueurii Tree of Life web project: ''Ancistrocheirus lesueurii'']
*[http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=555713 ITIS entry]{{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }}

{{Taxonbar|from1=Q18519508|from2=Q2015219|from3=Q18690327}}

[[Category:Enoploteuthoidea]]
[[Category:Monotypic cephalopod genera]]
[[Category:Bioluminescent molluscs]]
[[Category:Taxa named by John Edward Gray]]
[[Category:Taxobox binomials not recognized by IUCN]] <!-- Ancistrocheirus lesueurii -->

{{Squid-stub}}