Scolecithricella nicobarica - Species Card - Marine Planktonic Copepods

Scolecithricella nicobarica Sewell, 1929 (F,M0)

Taxonomy

Order Calanoida

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Superfamily Clausocalanoidea

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Family Scolecitrichidae

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Genus Scolecithricella

details list species for this Genus

Abbreviations or symbols

Synonymy

Scolecithrix nicobarica Sewell, 1929 (p.209, figs.F,M); Tanaka, 1962 (p.36, figs.F,M); Chen & Zhang, 1965 (p.60, figs.F,M); Silas, 1972 (p.647); Bradford, 1973 (p.141); Carter, 1977 (1978) (p.36); Zheng & al., 1982 (p.41, figs.F); Bradford & al., 1983 (p.113); Furuhashi, 1966 a (p.295, vertical distribution in Kuroshio region, Table 10) ; Guangshan & Honglin, 1984 (p.118, tab.); Yoo, 1991 (tab.1); Gopalakrishnan & Balachandran, 1992 (p.167, figs.1, 5, Table 1, 2); Kim & al., 1993 (p.270); Shih & Young, 1995 (p.73); Go & al., 1997 (tab.1); Noda & al., 1998 (p.55, Table 3, occurrence); Lo & al., 2001 (1139, tab.I); Kazmi, 2004 (p.229); Wang & Zuo, 2004 (p.1, Table 2, dominance, origin); Zuo & al., 2006 (p.163: tab.1, 3, fig.9G, spatial abundance, fig.8: stations group); Hwang & al., 2006 (p.943, tabl. I); Dur & al., 2007 (p.197, Table IV); Fernandes, 2008 (p.465, Tabl.2); C.-Y. Lee & al., 2009 (p.151, Tab.2); Sun & al., 2010 (p.1006, Table 2)

References

List of the studied authors

Farran, 1936 a (p.97, figs.F); Sewell, 1948 (p.323); Grice & Hulsemann, 1967 (p.17); Fleminger, 1967 a (tabl.1); Vyshkvartzeva, 1999 (2000) (p.234); Soih & al., 2013 (p.102, figs.F,M)

Figures

Plate 1 issued from: Q.-c Chen & S.-z. Zhang in Studia Marina Sinica, 1965, 7. [Pl.18, 8-13]. As Scolecithrix nicobarica.
Female (from E China Sea): 8, habitus (dorsal); 9, idem (lateral right side); 10, right P1 (anterior); 11, left P3 (posterior).

Male: 12, habitus (dorsal); 13, P5 (posterior).

Species Scolecithricella nicobarica - Plate 2 of morphological figures

Plate 2 issued from : R.B.S. Sewell in Mem. Indian Mus., 1929, X. [p.210, Fig.78]. As Scolecithrix nicobarica. Female (from Nankauri Harbour): a, habitus (dorsal); b, A1; c, P1; d, P2; e, P3; f, P4.

Male: g, P5.

Species Scolecithricella nicobarica - Plate 3 of morphological figures

Plate 3 issued from : Z. Zheng, S. Li, S.J. Li & B. Chen in Marine planktonic copepods in Chinese waters. Shanghai Sc. Techn. Press, 1982 [p.42, Fig.24]. As Scolecithrix nicobarica.
Female: a-b, habitus (dorsal and lateral, respectively); c, P1; d, P3.
Scale bars in mm.

Species Scolecithricella nicobarica - Plate 4 of morphological figures

Plate 4 Issued from : H.Y. Soh, S.Y. Moon & J.H. Wi in Invertebrate Fauna of Korea (eds) Incheon: NIBR, 2013, 21 (28). [p.103, Fig.59].
Female (from Korean waters): A-B, habitus (dorsal and lateral, respectively); C, rostrum; D, A1; E, A2; F, Md; G, Mx1.
Scale bars: A, B = 300 µm; C-E = 10 µm; F, G = 20 µm.

Species Scolecithricella nicobarica - Plate 5 of morphological figures

Plate 5 Issued from : H.Y. Soh, S.Y. Moon & J.H. Wi in Invertebrate Fauna of Korea (eds) Incheon: NIBR, 2013, 21 (28). [p.104, Fig.60].
Female: A, Mx2; B, Mxp; C, P1; D, P2; E, P3; F, P4.
Scale bars: A, B = 20 µm; C-F = 10 µm.

Species Scolecithricella nicobarica - Plate 6 of morphological figures

Plate 6 Issued from : H.Y. Soh, S.Y. Moon & J.H. Wi in Invertebrate Fauna of Korea (eds) Incheon: NIBR, 2013, 21 (28). [p.105, Fig.61].
Male: A-B, habitus (dorsal and lateral, respectively); C, D, A1; E, P5.
Scale bars: A, B = 300 µm; C, D = 20 µm; E = 10 µm.

Species Scolecithricella nicobarica - Plate 7 of morphological figures

Plate 7 issued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1962, X (1). [p.36, Fig.127]. As Scolecithrix nicobarica.
Female (Sagami Bay): a, habitus (dorsal); b, head (lateral left side); c, last thoracic segment and urosome (lateral left side); d, P1; e, P2; f, endopod of P3; g, basal segments of P4.

Male: h, last thoracic segment and urosome (lateral left side); i, P5.

Nota Female:
- Cephalothorax about 4.13 times the abdomen length.
- Head and 1st pediger segment fused, 4th and 5th pedigers fused, line of fusion not observed.
- Posterolateral corners of the last thoracic segment slightly indented on margin.
- Rostrum with 2 strong spines terminating into fine point.
- Abdomen 4-segmented; segments and caudal rami in the proportional lengths 43 : 18 : 18 : 9 : 12 = 100.
- Genital segment not swollen ventrally.
- Anal segment short.
- Caudal rami as long as wide.
- A2 20-segmented, extends to the posterior margin of the 2nd abdominal segment. Segments 1-2, 8-9-10, 24-25 are fused., segments 12 and 13 partially fused.
- A2 exopod slightly longer than endopod (7 : 5).
- Mx1 with 7 long and 2 short setae on outer lobe; 7 setae on exopod; 6 setae on endopod; 3 setae on the 2nd basal; 3 setae on the 3rd inner lobe; 2 setae on the 2nd inner lobe; 9 setae on the 1st inner lobe (= arthrite).
- Mx2 with 3 long vermiform and 5 bud-like sensory filaments on endopod.
- Mxp with the 1st basal segment slightly shorter than the 2nd.
- P1 exopod 3-segmented and endopod 1-segmented; exopodal segment 1 without marginal spine; coxa with a row of spinules.
- P2 with exopod 3-segmented and endopod 2-segmented; the 2nd and 3rd exopodal segments and the 2nd endopodal segment are furnished with rows of spinules on the posterior surface; coxa xery finely denticulated on proximal half of the outer margin; basis with a small spine on inner margin about the middle.
- P3 and P4 with exopod and endopod each 3-segmented.
- P4 with coxa finely serrated on outer distal margin; there is a small protuberance near the outer distal margin; the segment has a transverse row of spinules at the base of the small inner marginal seta on posterior surface; basis with a rounded process near the inner distal margin where the endopod articulates.
- P5 absent.

Nota Male (from Suruga Bay):
- Cephalothorax about 2.95 the abdomen length.
- Urosome 5-segmented; abdominal segments and caudal rami in the proportional lengths 17 : 33 : 17 : 21 ; 5 : 7 = 100.
- Caudal rami as long as wide.
- A1 18-segmented on the left side, reaches back to the distal end of the 2nd abdominal segment; segments 8-13, 20-21 and 24-25 fused, segment 12 and 13 fused on the posterior margin.
- A2 exopod slightly longer than endopod.
- Md robust.
- Mx1 ith 7+2 setae on outer lobe.
- Mx2 with long vermiform filaments on endopod.
- Mxp robust.
- P1 to P4 as those of the female.
- P5 reaches back to the caudal rami; left leg with endopod very small; exopod 3-segmented, the distal segment carries a thin lamellous plate on the apex. Endopod of right leg triangular in shape, carries a slender spine at apex; distal segment of exopod slender.

Complementary References

List of the studied authors

Brinton & al., 1986 (p.228, Table 1); Chen Y.-Q., 1986 (p.205, Table 1: abundance %, Table 2: vertical distribution); Madhupratap & Haridas, 1986 (p.105, tab.1); Suarez-Morales & Gasca, 1998 a (p.111); Kuriyama & Nishida, 2006 (p.300: Tab.II; p.309: Tab.III, fig.7, 10, vertical distribution); in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.).

Distribution

NZ: 6

Distribution map of Scolecithricella nicobarica by geographical zones

Distribution map of Scolecithricella nicobarica for the Zone Indian Ocean

Distribution map of Scolecithricella nicobarica for the Zone China Seas, Vietnam

Additional Maps & Charts

Species Scolecithricella nicobarica - Distribution map 4

Map 4 issued from : T.C. Gopalakrishnan & T. Balachandran in Oceanogr. Indian Ocean, 1992. [p.171, fig.5, A]. As Scolecithrix nicobarica.
Distribution of Scolecithricella nicobarica in the Indian Ocean.
Nota: Main occurences between 25° N - 20° S.

Localisations

Geographical glossary

South Africa (E), Natal, Indian (W & N), Pakistan, Bay of Bengal, Nicobar Is.: Nankauri Harbour, China Seas (Yellow Sea, East China Sea, South China Sea), Taiwan, Okinawa, S Korea, Japan, Sagami Bay, Kuchinoerabu Is., Pacif. (W equatorial), Australia (Great Barrier), California, Gulf of California

Quotations

N: 32

Dimensions (mm)

References of the authors concerning dimensions

(29) F: 1,08; M: 1,08; (34) F: 1,37-1,35; (117) F: 1,446; M: 1,5; (290) F: 1,45-1,5; M: 1,4-1,5; (1000) F: 1,5 ± 0.0; M: 1,5 ± 0.0; (1023) F: 1,45; (1174) F: 1,21-1,23; M: 1,15-1,17; {F: 1,08-1,50; M: 1,08-1,50}

Remarks

epi-mesopelagic. 298-526 m at Station N-1 (SW Bösö, E middle Japan) from Furuhashi (1966 a).
After Tanaka (1962, p.38) the specimen from the Izu region (Japan) differs from Sewell in the structure of the A2.

Last update : 18/01/2021

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