Pontellopsis macronyx - Species Card - Marine Planktonic Copepods

Pontellopsis macronyx A. Scott, 1909 (F,M)

Taxonomy

Order Calanoida

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Superfamily Diaptomoidea

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Family Pontellidae

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Genus Pontellopsis

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Abbreviations or symbols

Synonymy

Pontellopsis herdmani : Sewell, 1912 (p.375, figs.F)

References

List of the studied authors

A. Scott, 1909 (p.173, figs.F,M); Sewell, 1912 (p.375, Rem.F); 1932 (p.387, figs.F); Farran, 1936 a (p.118); Voronina, 1962 a (p.68); Kasturirangan, 1963 (p.57, 59, figs.F,M); Sherman, 1964 (p.481); Saraswathy, 1966 (1967) (p.84); Silas & Pillai, 1973 (1976) (p.841, Rem., figs.F,M); Pillai, 1975 (p.138, figs.M, Rem.); Chen & Shen, 1974 (p.131, figs.F,M); Zheng & al., 1982 [p.92, Figs.M); Ohtsuka & Onbé, 1991 (p.214); Chihara & Murano, 1997 (p.872, Pl.158,160: F,M); Mulyadi, 2002 (p.136, figs.F,M, Rem.); Conway & al., 2003 (p.137, figs.F,M, Rem.); Phukham, 2008 (p.96, figs.M)

Figures

Plate 1 Issued from : R.B.S. Sewell in Rec. Indian Mus., 1912, 7. [Pl.XXIV, Fig.5]. As Pontellopsis herdmani.
Female (from Bay of Bengal): 5, urosome.

Species Pontellopsis macronyx - Plate 2 of morphological figures

Plate 2 Issued from : R.B.S. Sewell in Mem. Indian Mus., 1932, X (continued). [p.385, Fig.128, c].
Female (from N Indian): c, habitus (dorsal).

Species Pontellopsis macronyx - Plate 3 of morphological figures

Plate 3 issued from : Q.-c Chen & C.-j. Shen in Studia Marina Sinica, 1974, 9. [p.131, Figs.29-34].
Female (from South China Sea): 29, habitus (dorsal), with spermatophore; 30, rostrum (frontal view); 31, P5.

Male: 32, last thoracic segment and urosome (dorsal); 33, right A1; 34, P5.

Species Pontellopsis macronyx - Plate 4 of morphological figures

Plate 4 issued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate LIV, Figs.1-10].
Female (from Indonesian waters): 1, habitus (dorsal); 2, rostrum; 3, A1; 4, Mxp; 5, endopodite of P1; 6, P5.
Nota: Abdomen 2-segmented. Genital segment slightly asymmetrical; A1 20-segmented, reaching the end of the thorax.

Male: 7, last thoracic segment and urosome (dorsal); 8, right A1; 9, grasping segments of right A1; 10, P5.

Species Pontellopsis macronyx - Plate 5 of morphological figures

Plate 5 issued from : E.G. Silas & P.P. Pillai in J. mar. biol. Ass. India, 1973 (1976), 15 (2). [p.841, Fig.30].
Female (from Indian Ocean): a, urosome (dorsal); b, P5.
Nota: Genital segment asymmetrical, provided with 3 spines, 2 towards proximal dorsal side with a band of fine spinules at their bases on either side, 3rd spine situated at tip of a rounded eminence on right side; laterally genital segment provided with scattered setae. Anal lamina well developed, situated more towards right side. A1 16 -segmented. The genital segment shows slight variation from the form described by A. Scott (1909) in that were only 3 spines, the left disto-lateral spine being absent. Also, the bands of fine setules at the base of proximal spines of the genital segment observed in the present material have not been described so far

Male: c, right A1 (geniculate part); d, P5.
Scale as in Calanopia minor.

Species Pontellopsis macronyx - Plate 6 of morphological figures

Plate 6 issued from : Z. Zheng, S. Li, S.J. Li & B. Chen in Marine planktonic copepods in Chinese waters. Shanghai Sc. Techn. Press, 1982 [p.93, Fig.53].
Male: a, habitus (dorsal); b, right lateral portion of segments 1-3 of urosome (dorsal); c, A1; d, P5.
Scale bar in mm.

Species Pontellopsis macronyx - Plate 7 of morphological figures

Plate 7 Issued from : R.B.S. Sewell in Rec. Indian Mus., 1912, 7. [p.375]. As Pontellopsis herdmani.
Female: Characters of P. herdmani, P. macronyx and intermediate form.

Nota:
According to Sewell (1912, p.375), the differences between the two forms P. macronyx and herdmani, which was descibed by Thompson & Scott from Sri-Lanka and the waters to the east of Borneo, Scott was quite justified in making them different species, but the discovery of a third and intermediate form from the Burma coast indicates that in reality we are dealing with a single variable species. The author proposes to combine the three forms under the name of P. herdmani. From the comparison of characters, it would appear that we are dealing with another example of continuous variation, apparently affecting only the females of the species, for as the habitat extends to the westward we meet with a tendancy for a reduction of the niumber of spines on the genital segment of the abdomen, a fusion of certain segments at the base of A1, and the formation of a second spine on the left P5.
The males correspond exactly with the description of P. macronyx, A. Scott (1909).

Plate 8 Issued from : R.B.S. Sewell in Rec. Indian Mus., 1912, 7. [p.376].
Female: Characters of P. herdmani, P. macronyx and intermediate form (from Bay of bengal).

Species Pontellopsis macronyx - Plate 9 of morphological figures

Plate 9 issued from : Mulyadi in Treubia, 2002, 32; [p.137, Fig.50].
Female: a, habitus (dorsal); b, metasomal somite 5 and urosome (dorsal); c, P5.

Male: d, habitus (dorsal); e, metasomal somite 5 and urosome (dorsal); f, P5.

Species Pontellopsis macronyx - Plate 10 of morphological figures

Plate 10 issued from : N. Phukham in Species diversity of calanoid copepods in Thai waters, Andaman Sea (Master of Science, Univ. Bangkok). 2008. [p.180, Fig.54].
Male (from W Malay Peninsula): a, habitus (dorsal); b, right A1; c, urosome (dorsal); d, same (oblique view); e, P5.

Body length after the drawing: M = 1.508 mm.

Species Pontellopsis macronyx - Plate 11 of morphological figures

Plate 11 issued from : P.P. Pillai in J. mar. biol. Ass. India, 1975, 17 (2). [p.136, Fig.3, h].
Male (from Indian Ocean): h, P5.
Scale: double bars: 0.05 mm.

Complementary References

List of the studied authors

Sewell, 1948 (p.322); Patel, 1975 (p.660); Guangshan & Honglin, 1984 (p.118, tab.); Madhupratap & Haridas, 1986 (p.105, tab.1); Shih & Young, 1995 (p.72); Sharaf & Al-Ghais, 1997 (tab.1); Padmavati & al., 1998 (p.347); El-Serehy, 1999 (p.172, Table 1, occurrence); Shanthi & Ramanibai, 2011 (p.132, Table 1)

Distribution

NZ: 5

Distribution map of Pontellopsis macronyx by geographical zones

Distribution map of Pontellopsis macronyx for the Zone Indian Ocean

Distribution map of Pontellopsis macronyx for the Zone China Seas, Vietnam

Additional Maps & Charts

Species Pontellopsis macronyx - Distribution map 4

Map 4 issued from : P. Pillai in J. mar. biol. Ass. India, 1975, 17 (2). [p.142, Fig.8].
Occurrence of Pontellopsis regalis and P. macronyx collected from 32 stations in the Indian Ocean (See in Hand Book to the International Zooplankton Collections, volume I, 1969).

Localisations

Geographical glossary

Arabian Sea, Arabian Gulf, UAE coast, Seychelles, Trivandrum coast, India (Saurashtra coast), G. of Bengal, W Malay Peninsula (Andaman Sea), Indonesia (Sunda Strait, Jakarta Bay, S Java, Lombok Strait), China Seas (East China Sea, South China Sea), Pacif. (W equatorial), Australia (Great Barrier), New Hebrides, Samoa Is., Pacif. (equatorial central)

Quotations

N: 26

Dimensions (mm)

References of the authors concerning dimensions

(5) F: 1,97; M: 1,67; (34) F: 2,04-1,68; (44) F: 1,733; (256) F: 1,94-1,8; M: 1,68-1,55; (334) F: 1,97-1,7; M: 1,67; (394) F: 2,1-1,82; M: 1,78-1,6; (530) M: 1,8; (991) F: 1,8-1,97; M: 1,55-1,68; (1023) M: 1,67-1,78; (1087) F: 1,8-1,9; M: 1,55-1,60; (1115) M: 1,78; {F: 1,68-2,10; M: 1,55-1,80}

Remarks

Neritic.
For Mulyadi (2002, p.138) female specimens differ from the original female described by A. Scott (1909) in having: 1- the urosomal segment 1 is short and bearing 2 spine-like processes on right side, anterior part with band of small spinules; 2- the left P5 without outer spines. Silas & Pillai (1973) noted the variations of processes on the urosomite 1 and the form of P5.

See in DVP Conway & al., 2003 (version 1)

Last update : 21/07/2016

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