Species Card of Copepod
Calanoida ( Order )
    Metridinidae ( Family )
        Pleuromamma ( Genus )
Pleuromamma scutullata  Brodsky, 1950   (F,M)
Syn.: Pleuromamma scatulata : Ikeda & al., 2006 (p.204);
? Pleuromamma abdominalis var. scutullata : Harding, 1974 (p.141, tab.3, gut contents);
Ref.:
Brodsky, 1950 (1967) (p.312, figs.F,M); Vinogradov, 1968 (1970) (p.58, 257); Vaupel-Klein, 1970 (p.4, 37, fig.M); Minoda, 1971 (p.36); Gardner & Szabo, 1982 (p.342, figs.F,M); Ferrari, 1984 a (p.168, 170); J.S. Park & Mauchline, 1994 (p.108 & suiv., fig.F); Chihara & Murano, 1997 (p.839, tab.7, Pl.130: F,M); Ferrari & Saltzman, 1998 (p.220, figs.F,M, Rem.); Sedova, 2006 (p.682, figs.F,M); Sedova & Grigoryev, 2010 (p.1, figs.F,M, morphological variation); Takenaka & al., 2013 (p.201, DNA sequences vs luciferase)
Species Pleuromamma scutullata - Plate 1 of morphological figuresIssued from : J.C. von Vaupel-Klein in Zool. Verh. Leiden, 1970, 110. [p.31, Fig.14,d].
Male: d, last thoracic segment and urosome (lateral left side).


Species Pleuromamma scutullata - Plate 2 of morphological figuresissued from : F.D. Ferrari & J. Saltzman in Plankton Biol. Ecol., 1998, 45 (2). [p.221, Fig.9].
Female (from Gulf of Alaska): A, genital complex with spermatophore (ventral); B, idem (lateral right side); C, A1 segmets 1-2 (arrows to segmental attenuations); D, P5 (arrow to extra seta and its location).

Male (from Gulf of Alaska): E, urosomal 2-3 (dorsal); F, idem (ventral); G, idem (lateral right side); H, left A1 segments 13-14 (arrowhead to tip of distal rigid seta; arrow to axial angle of segment attenuation); I, P5 (anterior) (arrow connects left exopod 2 and 3; arthropodial membranes and poorly sclerotized areas stippled); J, P5 (posterior) (arrow connects left exopod 2 and 3; arthropodial membranes and poorly sclerotized areas stippled).

Nota: Thoracic, abdominal somites and ramal segments are numbered according to their appearance during development as interpreted from data of Hulsemann (1991).


Species Pleuromamma scutullata - Plate 3 of morphological figuresIssued 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.311, Fig.217].
Female (from NW Pacific): habitus (dorsal and lateral right side); forehead (dorsal); Ve, urosome (ventral); S5, P5.

Male: habitus (dorsal); S5, P5.


Species Pleuromamma scutullata - Plate 4 of morphological figuresissued from : N.A. Sedova inZool. Zh., 2006, 85 (6). [Fig.1]
Female (from Kamchatka Peninsula): 1-2, habitus (dorsal views); 3, idem (lateral); 4, forehead (lateral); 5, proximal segments of A1.

Male: 6-7: habitus (lateral); 8, proximal segments of A1.


Species Pleuromamma scutullata - Plate 5 of morphological figuresissued from : N.A. Sedova in Zool. Zh., 2006, 85 (6). [Fig.2]
Female: 1, P1; 2, P2; 3, P3; 4, P5; 5, P5 (abnormal).

Male: 6, P5.


Species Pleuromamma scutullata - Plate 6 of morphological figuresissued from : N.A. Sedova in Zool. Zh., 2006 (85 (6). [Fig.3]
Female: 1, A1; 2, A2; 3, Md (mandibular palp); 4, Md (gnathobase); 5, Mx1; 6, Mxp.


Species Pleuromamma scutullata - Plate 7 of morphological figuresissued from : N.A. Sedova & S.S. Grigor'ev in Zool. Zh., 2010, 89 (4). [p.4, Fig.1].
Female (from off Kamchatka): 1, A1; 2, anomaly on the 11-12th sehments; 3, distal segments of A1 in female 6-7); 4-5, habitus (dorsal and lateral, respectively); 6-7 , habitus with protuberance in thorax (dorsal and lateral, respectively).

Male: 8-9, habitus (dorsal and lateral, respectively)


Species Pleuromamma scutullata - Plate 8 of morphological figuresissued from : N.A. Sedova & S.S. Grigor'ev in Zool. Zh., 2010, 89 (4). [p.5, Fig.2].
Twelve variations in the proximal segments of A1.


Species Pleuromamma scutullata - Plate 9 of morphological figuresissued from : N.A. Sedova & S.S. Grigor'ev in Zool. Zh., 2010, 89 (4). [p.7, Fig.3].
Female: 1, Mxp; 2, endopodal segments 2, 3 and 4 of Mxp; 3, A2; 4, ,5, Md (with variations arrowed)


Species Pleuromamma scutullata - Plate 10 of morphological figuresissued from : N.A. Sedova & S.S. Grigor'ev in Zool. Zh., 2010, 89 (4). [p.8, Fig.4].
Female: 1, coxo and basis (normal); others, variants; 2, P4.
Nota: Three attibutes varied simultaneously in the P4


Species Pleuromamma scutullata - Plate 11 of morphological figuresissued from : N.A. Sedova & S.S. Grigor'ev in Zool. Zh., 2010, 89 (4). [p.9, Fig.5].
Female: 1, P5 (normal); 2, P5 (abnormal); 3-4, apical setae; 5, structure of the seta; 6, P5 with anomaly; 7, right P5; 8, left P5.
Nota: P5 with more than 7 variants of structure.

Compl. Ref.:
Minoda, 1958 (p.253, Table 1, 2, abundance); Furuhashi, 1966 a (p.295, vertical distribution vs mixing Oyashio/Kuroshio region; Table 1: as scutellata); Morris, 1970 (p.2301); Sasaki al., 1988 (p.505, tab.1, fecal pellets flux); Hattori, 1989 (p.39); Hattori, 1991 (tab.1, Appendix); Kotani & al., 1996 (tab.2); Yamaguchi & Ikeda, 2000 b (p.29); Yamaguchi & al., 2004 (tab.2); Park, W & al., 2004 (p.464, tab.1); Sedova & Grigoriev, 2005 (p.112); Ikeda & al., 2006 (p.1791, Table 2); Morales-Ramirez & Suarez-Morales, 2008 (p.521); Galbraith, 2009 (pers. comm.); Chiba & al., 2009 (p.1846, Table 1, occurrence vs temperature change); Homma & Yamaguchi, 2010 (p.965, Table 2); Homma & al., 2011 (p.29, Table 2, 3, 4, abundance, feeding pattern: suspension feeders); Abe & al., 2012 (p.100, temporal & vertical changes, gut content); Takenaka & al., 2012 (p.1669, fig.2, 3, Table 1, bioluminescence); Kobari & al., 2013 (p.78, Table 2); Ohashi & al., 2013 (p.44, Table 1, Rem.); Coyle & al., 2014 (p.97, table 3)
NZ: 4 + 1 doubtful

Distribution map of Pleuromamma scutullata by geographical zones
Species Pleuromamma scutullata - Distribution map 2Issued from : K. Furuhashi in Publ. Seto Mar. Biol. Lab., 1966, XIV (4). [p.314, Fig.2].
Vertical distribution of Pleuromamma scutullata at four stations from the Oyashio region St. 1 (off E Hokkaido), transitional zone between Oyashio/Kuroshio regions: St. H12 (40°N, 152°E) and the Kuroshio region St. S2 (34°.5N, 141°E) and St. T-1 (30°, 142°E).
Sampling by vertical closing net in May 1964.
Species Pleuromamma scutullata - Distribution map 3Issued from : K. Furuhashi in Publ. Seto Mar. Biol. Lab., 1966, XIV (4). [p.319, Fig.7].
Vertical distribution of the water temperature at four stations from Oyashio region (SE Hokkaido) to Kuroshio region (E and SE off middle Japan).
Loc:
E Japan, off Sanriku, Kuroshio region, off SE Hokkaido, Station ''H'', Kamchatka, off SE Kuril Is., Station Knot (44°N, 155°E), Okhotsk Sea, S Bering Sea, S Aleutian Basin, S Aleutian Is., G. of Alaska, Icy Strait, Station "P", off W Queen Charlotte, Pacif. (central sub-Arctic); W Costa Rica (in Morales-Ramirez & Suarez-Morales, 2008)
N: 33
Lg.:
(22) F: 4-3,6; M: 3,2-3,1; (205) F: 3,9; M: 3,25; (208) F: 4-3,9; M: 3,3; (772) F: 3,9-3,7; M: 3,3-3; (1092) F: 4,34-4,30; M: 3,76-3,72; (1096) F: 3,5-5,0; M: 2,7-3,9; {F: 3,50-5,00; M: 2,70-3,76}

The mean female size is 4.013 mm (n = 11; SD = 0.4164), and the mean male size is 3.323 mm (n = 10; SD = 0.3720). The size ratio (male : female) is 0.83 (n = 6; SD = 0.0287).
Rem.: epi- to abyssopelagic. The identified form under the name of Pleuromamma abdominalis var. scutullata from the Sargasso Sea by Harding, 1974 (p.145, tab.2) is without doubt an error.
For Ferrari & Saltzman (1998, p.220), females differ from P. robusta by anterior edge of genital segment , viewed laterally, not as vaulted, with a low hump on ventral edge posteriorly;, copulary pore located about half the distance between anterior and posterior edge of genital complex; A1 with pronounced attenuate points on segments 1 and 2; exopod 3 of P5 without lateral denticles. Males differ from P. robusta by urosomal segment 2 ventrally with a small area of spinules posteriorly on left side and laterally a small area on the right side; urosomal segment 3 ventrally with small areas of spinules posteriorly on left side and laterally areas of denticles on right side; tip of distal rigid seta of segment 14 of left A1 does not reach to the base of a distal attenuation of the segment; left exopod 2 (proximal) of P5 medial triangular attenuation not twisted, right basis without denticles, exopd 3 (middle) medial attenuation smoothly curved.
After Sedova & Grigoryev (2010, p.12) the features as the shape, size, and direction of teeth in proximal segments of A1, the presence of protuberances on the thorax and the armature of P5 are insufficient for species identification.
Last update : 15/02/2019
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