Labidocera pectinata - Species Card - Marine Planktonic Copepods

Labidocera pectinata Thompson & Scott, 1903 (F,M)

Taxonomy

Order Calanoida

details

Superfamily Diaptomoidea

details

Family Pontellidae

details

Genus Labidocera

details list species for this Genus

Abbreviations or symbols

Synonymy

Labidocera similis Cleve, 1904 (p.378, figs.F)

References

List of the studied authors

Thompson & Scott, 1903 (p.235, 252, figs.F); Sewell, 1912 (p.354, 370, figs.F, Rem.); 1914 a (p.236); 1932 (p.372, figs.M, Rem.); 1933 (p.28); 1948 (p.324); Kasturirangan, 1963 (p.50, 51, figs.F,M); Saraswathy, 1966 (1967) (p.81); Pillai, 1971 (p.66, figs.F,M, Juv. 1-5, Rem.); Silas & Pillai, 1973 (1976) (p.808, figs.F,M, Rem.); Goswami & Goswami, 1974 (p.109, fig. caryotypes); Fleminger & al., 1982 (p.262, Rem., figs.F,M); Mulyadi, 2002 (p.p.59, Table 2); Othman & Toda (2006, p.312, figs.F,M); Phukham, 2008 (p.83, figs.F,M); Ohtsuka & Nishida, 2017 (p.575, Rem.)

Figures

Plate 1 Issued from : R.B.S. Sewell in Mem. Indian Mus., 1932, X (continued). [p.373, Fig.124]..
Male (from N Indian): a, habitus (dorsal); b, grasping A1; c, right P5; d, left P5.

Species Labidocera pectinata - Plate 2 of morphological figures

Plate 2 issued from : P.P. Pillai in J. mar. biol. Ass. India, 1971, 13 (1). [p.74, Fig.5, a-f, h].
Female (from Bombay waters): a, habitus (dorsal): b, A2; c, Md; d, Mx2.

Male: f, habitus (dorsal); h, right A1.

Plate 3 issued from : P.P. Pillai in J. mar. biol. Ass. India, 1971, 13 (1). [p.75, Fig.6].
Female: a-f, variations in genital segment and P5 in six adults.
a-b: from Gulf of Mannar; c-e: from Cochin; f: from Bombay.

Species Labidocera pectinata - Plate 4 of morphological figures

Plate 4 issued from : P.P. Pillai in J. mar. biol. Ass. India, 1971, 13 (1). [p.73, Fig.4, f].
Male: f, P5.

Species Labidocera pectinata - Plate 5 of morphological figures

Plate 5 issued from : R.B. Seymour-Sewell Rec. Indian Mus., 1912, 7 (4). [Pl.XXIII];
Female: 8, P5 (After Cleve, 1903-04): P5; 9, P5 (from Burma: 14°41,5'N, 97°53'E).

Plate 6 issued from : A. Fleminger, B.H.R. Othman & J.G. Greenwood in J. Plankton Res., 1982, 4 (2). [Fig.4, K-L).
Female: K-L, posterior part of prosome and urosome (lateral and dorsal, respectively).

Species Labidocera pectinata - Plate 7 of morphological figures

Plate 7 issued from : A. Fleminger, B.H.R. Othman & J.G. Greenwood in J. Plankton Res., 1982, 4 (2). [Fig.5, E).
Female: E, P5 (posterior view).

Plate 8 issued from : A. Fleminger, B.H.R. Othman & J.G. Greenwood in J. Plankton Res., 1982, 4 (2). [Fig.6, I-J).
Male: I-J, posterior part of prosome and urosomal segments 1-3 (lateral and dorsal, respectively).

Species Labidocera pectinata - Plate 9 of morphological figures

Plate 9 issued from : A. Fleminger, B.H.R. Othman & J.G. Greenwood in J. Plankton Res., 1982, 4 (2). [Fig.7, E).
Male: E, P5 (posterior view).

Plate 10 issued from : A. Fleminger, B.H.R. Othman & J.G. Greenwood in J. Plankton Res., 1982, 4 (2). [Fig.8, E).
Male: E, right A1 (dorsal view).

Species Labidocera pectinata - Plate 11 of morphological figures

Plate 11 issued from : Mulyadi in Treubia, 2002, 32; [p.59, Table 2].
Characteristics features of L. pectinata in Indo-West Pacific. Comparison with L. detruncata, L. kroyeri and L. minuta (see at these species).

Species Labidocera pectinata - Plate 12 of morphological figures

Plate 12 issued from : B.H.R. Othman & T. Toda in Coastal Mar. Sc., 2006, 30 (1). [p.313, Fig.14].
Female (from Sister's Island, Singapore): A-B, habitus (dorsal and lateral, respectively); C-D, posterior part of prosome and urosome (lateral and dorsal); E, P5.

Nota: Prosome to urosome length ratio 3.25 : 1.
- Body elongated ending in a single spiniform process. Right and left thoracic process symmetrical.
- Cephalon separated from pedigerous somite 1.
- Cephalic hooks and small dorsal eye lens present.
- A1 symmetrical exyends to the genital segment.
- Urosome 3-segmented.
- Right distal end of genital segment with unequal lateral spurs.
- Distal end of 2nd urosomite with dorsal tubercle on right side, extending posteriad over anal segment.
- P5 asymmetrical,; right leg slightly longer than left; right exopod with one medial, 1oneterminal and one lateral spiniform processes; endopod with 7 denticles; left leg exopod with 2 lateral denticles; left exopod with 2 lateral denticles, one lateral spiniform process and terminating in an attenuated spiniform process.

Species Labidocera pectinata - Plate 13 of morphological figures

Plate 13 issued from : B.H.R. Othman & T. Toda in Coastal Mar. Sc., 2006, 30 (1). [p.313, Fig.15].
Male (from Sister's Island, Singapore): A-B, habitus (dorsal and lateral, respectively); C-D, posterior part of prosome and urosome (lateral and dorsal, respectively); E, P5.

Nota: Prosome to urosome length ratio 3.33 : 1.
- Body same as female but cephalic hooks, dorsal eye lens larger than females and contiguous.
- Right A1 geniculate extending beyond anal segment when extended, villiform teeth on segments 18-21.
- Right thoracic corner expanding horizontally, distally ending in lateral spiniform process and a medial process.
- Genital segment with short acicular process not reaching middle of urosomite segment 2.
- P5 with apical segment of left leg with medio-distal spur separated from cluster of 3 spiniform and 2 setiform processes by wide shallow notch; right leg with lamelliform process on proximal chelate segment, distal margin rounded and skewed toward thumb.

Species Labidocera pectinata - Plate 14 of morphological figures

Plate 14 issued from : N. Phukham in Species diversity of calanoid copepods in Thai waters, Andaman Sea (Master of Science, Univ. Bangkok). 2008. [p.164, Fig.38].
Female (from W Malay Peninsula): a-b, habirtus (dorsal and lateral, respectively); c; urosome (dorsal); d, same (oblique right lateral view); e, P5.

Male: f, habitus (dorsal); g, urosome (dorsal); h, same (lateral); i, P5.

Body length after the drawings: F = 1.689 mm (urosome curved); M = 1.533 mm.

Complementary References

List of the studied authors

Krishnaswamy, 1953 (p.135); Wellershaus, 1969 (p.263, occurrence); Patel, 1975 (p.660); Stephen & Iyer, 1979 (p.228, tab.1, 3, 4, figs.3, 4); Sreekumaran Nair & al., 1981 (p.493), Madhupratap & Haridas, 1986 (p.105, tab.1); Fleminger, 1986 (p.84, figs. 7, 8, Rem.: geographic vs Wallace's Line); Gajbhiye & al., 1991 (p.189); Gajbhiye & Abidi, 1993 (p.137); Ramaiah & al., 1996 (p.3); Ramaiah & Nair, 1997 (tab.1); Achuthankutty & al., 1998 (p.1, Table 2, seasonal abundance vs monsoon); Mauchline, 1998 (tab.8); Dalal & Goswami, 2001 (p.22, fig.2); Rezai & al., 2004 (p.489, tab.2); Kazmi, 2004 (p.228): Rakhesh & al., 2006 (p.93, Table 2, spatial distribution); Madhu & al., 2007 (p.54, Table 4, abundance vs monsoon); Shanthi & Ramanibai, 2011 (p.132, Table 1); Varadharajan & Soundarapandian, 2013 (p.2: occurrence vs stations); Rakhesh & al., 2013 (p.7, Table 1, abundance vs stations); Jagadeesan & al., 2013 (p.27, Table 3, seasonal distribution); Anjusha & al., 2013 (p.40, Table 3, abundance & feeding behavior)

Distribution

NZ: 2

Distribution map of Labidocera pectinata by geographical zones

Distribution map of Labidocera pectinata for the Zone Indian Ocean

Distribution map of Labidocera pectinata for the Zone China Seas, Vietnam

Additional Maps & Charts

Map 4 issued from : C.T. Achuthankutty, N. Ramaiah & G. Padmavati in Pelagic biogeography ICoPB II. Proc. 2nd Intern. Conf. Final report of SCOR/IOC working group 93, 9-14 July 1995. Workshop Report No. 142, Unesco, 1998. [p.8, Fig.6].
Salinity ranges for L. pectinata in coastal and estuarine waters of Goa (India).
Shaded area indicates the range of higher abundance.

Species Labidocera pectinata - Distribution map 5

Map 5 Issued from : A. Fleminger in UNESCO Techn. paers mar. Sci., 1986, 49. [p.92, Fig.7].
Present geographical distribution of the Labidocera pectinata species group., based on localities cited in Fleminger & al. (1982) and new unpublished data.
Extent of shading offshore is merely for illustrative purposes and not intended to depict actual offshore distribution of individual species; in most cases offshore distribution is confined to waters inshore of the 100 m isobath.
Cladogram in lower shows hypothetized phylogenetic relationships of species and shadings representing ranges of individual species.
Circled nodes are hypothetized speciation events taht appear to have occurred in the vicinity of Wallacea Line.

Localisations

Geographical glossary

Arabian Sea, Karachi, Sri Lanka (Palk Straits), Laccadive Is., India (W, Cochin Backwater, off Cochin, Saurashtra coast, Bombay, Goa, Kerala, Pointcalimere-Mnamelkudi, Madras, Burhabalanga estuary), E India, Gulf of Mannar, Palk Bay, Godavari region, Bay of Bengal, Andaman Sea, W Malay Peninsula, Malaysia (Riv. Kurau), Straits of Malacca, Singapore, Mersing (South China Sea)

Quotations

N: 31

Dimensions (mm)

References of the authors concerning dimensions

(44) M: 1,7; (77) F: 2,1; (256) F: 2,1-1,91; M: 1,73-1,6; (269) F: 2,13-2,06; M: 1,79; (334) F: 2,1; M: 1,7; (530) F: 2; M: 1,5; (795) F: 2; (1086) F: 1,84-2,15; M: 1,58-2,03; {F: 1,84-2,15; M: 1,50-2,03}

Remarks

More or less brackish; nearshore.
According to Othman & Toda (2006, p.313) the geographic distribution show that both L. pectinata and L. rotunda may be sympatric; off Sister's Island (Singapore), the samples show that both pectinata and rotunda are present. The extent of L. pectinata is from Karachi (Pakistan) to Mersing (South China Sea).
Ohtsuka & Nishida (2017, p.575) point to a comprehensive speciation pattern was proposed for the Indo-Pacific coastal L. pectinata species complex, based on vicariant events in accord with eustatic changes in sea level during the Pleistocene (< - 2.6 million years)) (Flemi,ger, 1986).

Last update : 11/05/2019

Contributor Remarks

to add your remark