Bradyetes inermis - Species Card - Marine Planktonic Copepods

Bradyetes inermis Farran, 1905 (F,M)

Taxonomy

Order Calanoida

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Superfamily Clausocalanoidea

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Family Aetideidae

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Genus Bradyetes

details list species for this Genus

Abbreviations or symbols

References

List of the studied authors

Farran, 1905 (p.32, Descr.F, figs.F); Rose, 1933 a (p.92, figs.F); Sewell, 1948 (p.499); Vervoort, 1952 b (n°43, p.3, figs.F); Bradford, 1969 b (p.502); Grice, 1972 a (p.224, figs.F,M, Rem.M); Markhaseva, 1996 (p.64, figs.F,M); Vives & Shmeleva, 2007 (p.549, figs.F,M, Rem.); Markhaseva & Schulz, 2006 a (p.143, 150, figs.F, Rem.)

Figures

Plate 1 issued from : G.P. Farran in Ann. Rep. Fish. Brch., Ireland, 1902-1903, II, App. 2, 1905. [Plate III, Figs.13-20].
Female (from W Ireland): 13-14, habitus (lateral and dorsal, respectively); 15, A1; 16, A2; 17, Mx1; 18, Mxp; 19, P1; 20, P2.

Species Bradyetes inermis - Plate 2 of morphological figures

Plate 2 issued from : G.P. Farran in Ann. Rep. Fish. Brch., Ireland, 1902-1903, II, App. 2, 1905. [Plate IV, Figs.13-14].
Female: 13, P3; 14, P4.

Species Bradyetes inermis - Plate 3 of morphological figures

Plate 3 issued from : E.L. Markhaseva & K. Schulz in Invert. Zool., 2006, 3 (2). [p.145, Fig.5]. With doubt. As Bradyetes cf. inermis.
Female (from S Atlantic): A-B, habitus (dorsal and lateral, respectively); C, posterior prosome and urosome (dorsal and left lateral view, respectively); E, rostrum (left lateral view); F, A2; G, Mx1 (praecoxal arthrite); H, Mxp (syncoxa); I, P1; J, P3 (exopodal segments 1 and 2); K, P4 (exopodal segments 1 and 2); L, P2.
Scales: A-B 0.5 mm; remaining figures 0.1 mm.
Above sea-bed at depths 4725-4469 m (41°08'S, 9°56'E) and 2889, 3005 m (60°38'S, 53°57'W and 58°16'S, 24°54'W, respectively).

Nota : Mx1 : praecoxal endite with 9 long and 2 small setae (length of smaller setae varies, sometimes 1 much smaller) ; coxal endite with 4 setae (1 longer and thicker than others) ; endopod with 12 setae ; exopod with 11 setae ; coxal epipodite with 9 setae. Mx2 : praecoxal and proximal coxal endites with 3 setae each ; proximal basal endite with 3 setae (1 thicker and more sclerotized, spine-like) ; distal basal endite plus ramus with 8 setae (6 long and 2 small) ; praecoxal and coxal endites with short surface spinules. Mxp : Coxal endite with 3 setae and small sensory appendage.

Species Bradyetes inermis - Plate 4 of morphological figures

Plate 4 issued from : E.L. Markhaseva & K. Schulz in Invert. Zool., 2006, 3 (2). [p.150, Table I].
Female: Selected character for B. inermis Farran and the form of Markhaseva & Schulz as B. cf. inermis.

Nota: Up to now descriptions of B. inermis are not very detailed and suffer from some inconsistencies, i.e. the lateral lobe of P1 endopod is figured as being well-developed by Grice (1972), but poorly in drawings by Farran (1905).

Plate 5 issued from : G.D. Grice in Crustaceana, 1972, 23 (3). [p.222, Figs.2-13].
Female (from off S Cap Cod): 2, habitus (lateral right side); 3, posterior end of prosome and urosome (dorsal); 4, A2; 5, Md (mandibular palp); 6, Md (cutting edge); 7, Mx2; 8, idem (other side); 9, Mxp; 10, P1; 11, P2; 12, P3; 13, P4.

Plate 6 issued from : G.D. Grice in Crustaceana, 1972, 23 (3). [p.225, Figs.14-22].
Male (from off S Cap Cod): 14, habitus (dorsal); 15, A1; 16, Md; 17, Mx1: 18, Mx2; 19, Mxp; 20, P5; 21, idem (other side); 22, distal end of exopod of left P5.

Nota: A1 with numerous setae and long aesthetasks proximally.
Mouth appendages greatly reduced, no mandible blade.
P5 biramous, endopods consist of one segment with the left one being more than twice the length of the right one.

Complementary References

List of the studied authors

Pearson, 1906 (p.12); Grice & Hulsemann, 1965 (p.223); Vives, 1982 (p.291); Markhaseva, 1998 (p.250, Fig.4); Holmes, 2001 (p.45); Bradford-Grieve, 2004 (p.283)

Distribution

NZ: 3 + 3 doubtful

Distribution map of Bradyetes inermis by geographical zones

Distribution map of Bradyetes inermis for the Zone Antarctic and for the Zone Sub-Antarctic

Localisations

Geographical glossary

Morocco-Mauritania, off Madeira, off S Cape Cod, off S & W Ireland, S Atlant., Antarct. (E South Shetland Is.)

Quotations

N: 8

Dimensions (mm)

References of the authors concerning dimensions

(58) F: 2,57; (213) F: 3,2-3; M: 2,52-2,44; (968) F: 2,95; {F: 2,57-3,20; M: 2,44-2,52}

Remarks

épi-méso & bathypélagic; ? hyperbenthic.
The specimens from the South Atlantic are considered the same by Markhaseva & Schulz (2006 a) untill the type specimens can be redescribed or specimens from the type locality or specimens from the type locality in the N Atlantic have been described.

Last update : 08/05/2016

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