Overview

Comprehensive Description

Description

Body opaque, swimming legs with a yellow tint, eye ruby-red.

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Source: iArcZoo

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Distribution

Arctic to Gulf of Maine
  • North-West Atlantic Ocean species (NWARMS)
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Source: World Register of Marine Species

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Arctic ocean and adjacent seas, North Atlantic, Indian Ocean, Gulf of Guinea. Wide-spread and very common in the North Pacific: Sea of Japan, Sea of Okhotsk, Bering Sea

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Physical Description

Morphology

Female:
Head fused with the thorax, the 4th and 5th thoracic segments separate. The top of the head from side view is widely rounded and strongly arched. The posterior corners of the last thoracic segment form an obtuse angle. Abdomen is very small and thin, 4 times shorter than the cephalothorax. A1 reach the posterior margin of the genital segment. Rostrum consists of a bifurcate plate with sharp tips of the rami. Exopodite of P1 with only 2 lateral spines (spine is absent on the 1st segment).
P5 leaf-shaped, 1-segmented, with a very short apical spine and a longer serrated lateral spine on the inner edge, and also a very short small spine on the outer side of the segment.

Male:
Longer A1, which reach the 4th abdominal segment, head less arched. Rostrum with shorter and wider branches. P5 longer than the abdomen. The left P5 with a rudimentary endopodite, the distal segment of the exopodite spike-shaped. The distal segment of the right leg plate-shaped, the second segment of the basipodite with a small projection on the inner edge (rudimentary endopodite).

v. orientalis (North Pacific, Sea of Japan, Sea of Okhotsk, Bering Sea. Does not go beyond the Southern Chukchi)
P5 in females with a slightly curved and elongated distal segment. The outer lateral spine is shifted toward the apical spine.

v. occidentalis (North Atlantic and Arctic Ocean with adjacent seas)
P5 in females with a short and rounded distal segment. The distance between the apical and outer lateral spine is equal to the distance between the last and the proximal end of the segment.

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Size

Female: 1,08-1,70 mm
Male: 1,20-1,46 mm

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Diagnostic Description

The exopodite of P1 in females with 2 lateral spines, rostrum has the shape of a bifurcate plate, does not carry filaments or projections.

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Type Information

Paratype for Scolecithrix minor Brady, 1883
Catalog Number: USNM 85602
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: female;
Preparation: Alcohol (Ethanol)
Year Collected: 1873
Locality: Indian Ocean
Vessel: Challenger R/V
  • Paratype:
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Ecology

Habitat

upper region of the mesopelagic, and upper epipelagic of the Gulf and estuary
  • North-West Atlantic Ocean species (NWARMS)
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Source: World Register of Marine Species

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Depth range based on 667 specimens in 2 taxa.
Water temperature and chemistry ranges based on 527 samples.

Environmental ranges
  Depth range (m): 0 - 2025.5
  Temperature range (°C): -1.749 - 13.046
  Nitrate (umol/L): 0.460 - 44.900
  Salinity (PPS): 27.450 - 35.690
  Oxygen (ml/l): 0.651 - 9.143
  Phosphate (umol/l): 0.267 - 3.254
  Silicate (umol/l): 2.068 - 113.484

Graphical representation

Depth range (m): 0 - 2025.5

Temperature range (°C): -1.749 - 13.046

Nitrate (umol/L): 0.460 - 44.900

Salinity (PPS): 27.450 - 35.690

Oxygen (ml/l): 0.651 - 9.143

Phosphate (umol/l): 0.267 - 3.254

Silicate (umol/l): 2.068 - 113.484
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Oceanic epi- to bathypelagic species

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Scolecithricella minor

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 2 barcode sequences available from BOLD and GenBank.

Below is a 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 and other sequences.

TTTAGAATAATTATCCGTACAGAGTTAAGATGTGCAGGATCTTGAATTGGAGAT---GATCAAATTTATAATGTAATTGTAACAGCACATGCATTCACTATAATTTTTTTCATGGTTATACCAATTTTAATTGGAGGGTTTGGAAATTGGTTAGTGCCTCTCATA---TTGGGGAGAGTTGACATGGCATTTCCTCGAATAAATAACATAAGCTTTTGATTTTTAGCTCCGGCCATAGCCATATTGCTATCTAGGGCACTTGTTGAAGGGGGGGCTGGAACGGGTTGAACAGTATATCCCCCGCTTGCTGGCAATGTGGCACATGCTGGAGGATCTGTAGATTTT---GCAATTTTTTCTCTACATCTTGCAGGTGTAAGGTCTATTCTAGGGGCTGTTAACTTTTTAAGAACCCTAGGAAATCTTCGAACATTTGGGATATTACTGGACCGTATACCGTTATTTGTGTGGTCTGTGATAGTCACAGCTGTGCTTCTTTTGTTATCTTTACCTGTGCTAGCTGGG---GCAATTACTATGCTACTAACCGAT
-- end --

Download FASTA File

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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Scolecithricella minor

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 7
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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