Overview
Brief Summary
Introduction
The large number of undescribed species in the genus makes identification of any specimens difficult. Since the type locality of H. pefferi is in the North Atlantic, the North Pacific form of H. pfefferi described here may be one of these undescribed species.
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Comprehensive Description
Characteristics
- Mantle
- Papillae absent.
- Papillae absent.
- Arms
- Suckers in middle of arms III not enlarged in females.
- Suckers in middle of arms III not enlarged in females.
- Pigmentation
- Orange/brown chromatophores form bands of sides of mantle.
Comments
More details of the description can be found here.Trusted
Distribution
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Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
http://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=145244
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Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
http://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=145245
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Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213
http://www.marinespecies.org/mollusca/aphia.php?p=sourcedetails&id=1364
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MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0.
http://www.marinespecies.org/asteroidea/aphia.php?p=sourcedetails&id=149081
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Ramos, M. (ed.). 2010. IBERFAUNA. The Iberian Fauna Databank
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=149024
© WoRMS for SMEBD
Source:
World Register of Marine Species
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UNESCO-IOC Register of Marine Organisms
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=1318
© WoRMS for SMEBD
Source:
World Register of Marine Species
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UNESCO-IOC Register of Marine Organisms
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=1318
© WoRMS for SMEBD
Source:
World Register of Marine Species
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Vertical distribution
Off California, captures made with open nets indicated an ontogenetic descent and no diel vertical migration. The majority of specimens over 40 mm ML were taken at depths of 400-600 m.
Geographical distribution
The type locality is the temperate North Atlantic, near Ireland (51°54'N, 11°57'W). Due to the large number of undescribed species in this genus, the distribution of H. pfefferi is uncertain.
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Ecology
Habitat
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UNESCO-IOC Register of Marine Organisms
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=1318
© WoRMS for SMEBD
Source:
World Register of Marine Species
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Stocks, K. 2009. Seamounts Online: an online information system for seamount biology. Version 2009-1. World Wide Web electronic publication.
http://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=145453
© WoRMS for SMEBD
Source:
World Register of Marine Species
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Environmental ranges
Depth range (m): 450 - 1400
Graphical representation
Depth range (m): 450 - 1400
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Water temperature and chemistry ranges based on 129 samples.
Environmental ranges
Depth range (m): 50 - 2441
Temperature range (°C): 3.278 - 21.554
Nitrate (umol/L): 0.156 - 39.064
Salinity (PPS): 34.258 - 36.622
Oxygen (ml/l): 0.333 - 6.046
Phosphate (umol/l): 0.030 - 3.143
Silicate (umol/l): 0.798 - 80.938
Graphical representation
Depth range (m): 50 - 2441
Temperature range (°C): 3.278 - 21.554
Nitrate (umol/L): 0.156 - 39.064
Salinity (PPS): 34.258 - 36.622
Oxygen (ml/l): 0.333 - 6.046
Phosphate (umol/l): 0.030 - 3.143
Silicate (umol/l): 0.798 - 80.938
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Life History and Behavior
Life Cycle
Life History
Paralarvae are easily recognized as belonging to Helicocranchia by their shape and chromatophore patterns. In Hawaiian waters, however, there appears to be two different species in the genus. Two features, however, distinguish this paralarva from its less common congener (H. beebei?): The color pattern has more distinct bars and the eyes lack a short optic stalk (i.e., the optic lobe is adjacent to the central brain).
Figure. Ventral and dorsal views of paralarvae of H. pfefferi, Hawaiian waters. Left - 3.4 mm ML . Right - 4.4 mm ML. Arrows point to chromatophores that are part of prominent lateral bars. Ventral-head chromatophores hidden by the funnel are represented by dashed lines. The scale bar is 1 mm. Drawings by R. Young.
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Molecular Biology and Genetics
Molecular Biology
Barcode data: Helicocranchia pfefferi
There is 1 barcode sequence available from BOLD and GenBank. Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species. See the BOLD taxonomy browser for more complete information about this specimen. Other sequences that do not yet meet barcode criteria may also be available.
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Download FASTA File
© Barcode of Life Data Systems
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Statistics of barcoding coverage: Helicocranchia pfefferi
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
© Barcode of Life Data Systems
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Wikipedia
Helicocranchia pfefferi
Helicocranchia pfefferi, the banded piglet squid, is a small squid of the genus Helicocranchia. Adults of this species are mesopelaegic.
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Physical characteristics
The average size of adult H. pfefferi is 100 mm (3.9 in) in mantle length (ML). The body consists of a large funnel with small paddle-like fins. They have small tentacles above their eyes. The funnel does not have valves, but contains a dorsal pad with three papillae as organs.[citation needed] Paddle-shaped fins are attached to a part of the gladius. H. pfefferi has a single ocular photophore and does not have photophores at its arm tips.
Habitat
As paralarvae (<30 mm ML), they live near the surface of the oceans, between 100 m and 200 m deep. They descend to the mesopelagic zone as they mature, but do not exhibit a diel vertical migration pattern.[1]
References
- ^ Lu, C.C. & M.R. Clarke (1975). "Vertical Distribution of Cephalopods at 11° N 20° W in the North Atlantic". Journal of the Marine Biological Association of the United Kingdom 55 (2): 369–389. doi:10.1017/S0025315400016003.
- Young, R.E. & K.M. Mangold (1922-2003). 2006. Helicocranchia Massy, 1907. Version 16 July 2006 (under construction). In: The Tree of Life Web Project.
Source:
Wikipedia
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