issued from : J.G. Greenwood in Crustaceana, 1972, 22 (3). [p.314, Fig.1]. As Acartia (Acanthacartia) baylyi. Female (from Brisbane River mouth, E Australia): a, habitus (dorsal); b, rostrum (ventral view); c, urosome (dorsal); d, basal region of P5 (lateral); e, idem (postrior view); f, P5 (posterior); g, posterior metasomal region and urosome (lateral right side). Scale line: 0.5 mm (a); 0.005 mm (all others). Nota: Metasome more than 4 times length of urosome. Head and 1st thoracic segment separate, 4th and 5th fused. Caudal rami twice as long as wide. A1 when refleed reaching little beyond posterior border of metasome
issued from : J.G. Greenwood in Crustaceana, 1972, 22 (3). [p.316, Fig.2]. As Acartia (Acanthacartia) baylyi. Male: a, P5; b, habitus (dorsal); c, right A1 (hinge region); d, urosome (dorsal); e, posterior metasomal region and urosome (lateral left side). Scale line: 0.5 mm (b); 0.05 mm all others. Nota: Metasome 3.5 times length of urosome. Urosome 5-segmented. A1 when reflexed reacing posterolateral border of 3rd thoracic segment. Anal segment unarmed. Caudal rami 1.3 times as long as wide, longer than anal segment.
Issued from : K.A. Brodskii in Calanoida of the Far Eastern Seas and Polar Basin of the USSR. Opred. Fauna SSSR, 1950, 35 (Israel Program for Scientific Translations, Jerusalem, 1967) [p.424, Fig.299]. As Acartia plumosa. Female (from Sea of Japan): habitus (dorsal); urosome with spermatophore (dorsal); S5, P5.
Male: habitus (dorsal); urosome (dorsal); S5, P5.
issued from : H. Ueda & J. Hiromi in Crustaceana, 1987, 53 (3). [p.227, Fig.2, d-f]. Female: d, e, posterior metasome and urosome (dorsal and lateral, respectively); f, posterior metasome and 1st and 2nd urosomal segments (specimen with duplicate or triplicate spines on the posterior metasome). Nota: Posterior corner of metasome with 1 row of spines on each side; posteromedial region witout spinules. Genital segment with 1-14 posterodorsal spines, ventral surface without spinules. 2nd urosomal segment with 2-8 (usually 4) posterodorsal spines. 3rd ursomal segment without hairs. Caudal rami Length/Width 1.6-1.9. A1 spinule rows absent on any segment.
issued from H. Ueda & J. Hiromi in Crustaceana, 1987, 53 (3). [p.228, Fig.b, g]. Female: b, forehead (ventral); g, P5 (anterior view).
issued from : H. Ueda & J. Hiromi in Crustaceana, 1987, 53 (3). [p.229, Fig.4, c-e]. Male: c-d, urosome (dorsal and lateral, respectively); e, posterior urosome (specimen from Brisbane River mouth). Nota: 2nd urosomal segment with 3-8 posterodorsal spines; ventral surface with hair-like spines at 3-4 (usually 3) loci on each side (each locus usually with 1 spine but rarely with 2 or witout spines ( Two specimens from Brisbane River moth with medial 2 spines on urosomal segment 4 directed diagonally outward). Anal segment without hairs Caudal rami Length/width 1.0-1.1.
issued from : H. Ueda & J. Hiromi in Crustaceana, 1987, 53 (3). [p.231, Fig.5, b, c]. Male: b, P5 (anterior view); c, left terminal segment under cover glass).
issued from : H. Ueda & J. Hiromi in Crustaceana, 1987, 53 (3). [p.235, Table I]. Comparative list of characters in the Acartia plumosa - sinjiensis - tropica species group.
issued from : T. Ito in Pacif. Sc., 1956, 10 (4). [p.Fig.1]. As Acartia iseana. Female (from middle Japan): a, habitus (dorsal); b, last thoracic segments and urosome (dorsal); C, forehead (ventral); d-g, P1 to P4; h-i, P5 (dorsal and lateral, respectively). Nota: Head and 1st thoracic segment separated, 4th and 5th fused. Lateral angle of last thoracic segment rounded, furnished with 4 spinules on either side. Genital segment not laterally dilated, about as long as other two abdominal segments combined, 2nd segment about twice as long as anal segment; first two abdominal segments each with 6 spinules along distal margin of dorsal surface. Caudal rami about 2 times as long as wide, inner margin with few hairs. A1 17-segmented, reaching end of cephalothorax. segment
Male: j, P5. Nota: Abdomen 5-segmented, segment 4 well defined, but small. Caudal ramus 1.3 times as long as wide.
Mandchourie (Poseta Bay), Corée S, Japon (Tanabe Bay, Ise Bay, Lake in Hegura island), Okinawa (Naha Harbor), Taiwan (Tapong Bay), Australie E & NE (Brisbane estuary, Moreton Bay, Haughton Riv.)
Littoral, Brackish. According to Ueda & Hiromi (1987, p.232), contrary to the opinion of Tanaka (1965, p.387) Acartia plumosa and Acartia sinjiensis are not identical.
The species resembles Acartia tsuensis, but is distinguishable by the caudal ratio (2); exopodite of P5 in the female bearing a rounded lobe at base of terminal spine; inner prominence of exopodite 2 of right P5 in male bifurcate. ForOhtsuka & al.(1995, p.157) A. sinjiensis is apparently a warm-water species, and distributed in the tropical waters of Singapore and Java as well as in the temperate and subtropical waters of Japan.
Last update : 01/04/2010
Any use of this site for a publication will be mentioned with the following reference :
Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2010. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en [Accessed September 02, 2010]
 sinjiensis - Plate 1 of morphological figures',750,500);)
 sinjiensis - Plate 2 of morphological figures',750,500);)
 sinjiensis - Plate 3 of morphological figures',750,500);)
 sinjiensis - Plate 4 of morphological figures',750,500);)
 sinjiensis - Plate 5 of morphological figures',750,500);)
 sinjiensis - Plate 6 of morphological figures',750,500);)
 sinjiensis - Plate 7 of morphological figures',750,500);)
 sinjiensis - Plate 8 of morphological figures',750,500);)
 sinjiensis - Plate 9 of morphological figures',750,500);)
 sinjiensis - Distribution map 2',650,500);)
 sinjiensis - Distribution map 3',750,500);)
Any use of this site for a publication will be mentioned with the following reference :
 sinjiensis - Plate 1 of morphological figures){kind=link}
 sinjiensis - Plate 2 of morphological figures){kind=link}
 sinjiensis - Plate 3 of morphological figures){kind=link}
 sinjiensis - Plate 4 of morphological figures){kind=link}
 sinjiensis - Plate 5 of morphological figures){kind=link}
 sinjiensis - Plate 6 of morphological figures){kind=link}
 sinjiensis - Plate 7 of morphological figures){kind=link}
 sinjiensis - Plate 8 of morphological figures){kind=link}
 sinjiensis - Plate 9 of morphological figures){kind=link}
 sinjiensis - Distribution map 2){kind=link}
 sinjiensis - Distribution map 3){kind=link}