Character;"Stephos angulatus Bradford-Grieve, 1999";"Stephos antarcticum Wolfenden, 1908";"Stephos arcticus Sars, 1909";"Stephos boettgerschnackae Krsinic, 2012";"Stephos canariensis Boxshall, Stock & Sanchez, 1990";"Stephos concavus sp. nov.";"Stephos cryptospinosus Zagami, Campolimi & Costanzo, 2000" Female "Body length (mm)";0.82;1.85–2.0;1.20;0.89–0.93;0.64–0.69;0.93;0.86 "Posterolateral corners";symmetrical;"slightly asymmetrical";"slightly asymmetrical";asymmetrical;asymmetrical;asymmetrical;symmetrical "Shape of genital double–somite";asymmetrical;"symmetrical, lateral swelling on both side";"asymmetrical, lateral swelling on left side";symmetrical;"slightly asymmetrical";"asymmetrical, convex on posterior corner";symmetrical "Operculum shape of genital double–somite";triangular;–;–;–;rounded;"slightly rounded";"slightly rounded" "Ornamentation of genital double–somite";"fringe of fine spinules on left side";"long spines on both side";–;–;absent;"left side with 7 row spinules";absent "Antennule extention";"distal margin of first abdominal segment";"distal margin of second abdominal segment";"distal margin of fifth pedigerous somite";"distal margin of caudal rami";"distal margin of fifth pedigerous somite";"distal margin of genital double–somite";"distal margin of fifth pedigerous somite" "Row of spinules on basis of fifth legs";absent;absent;absent;absent;present;absent;present "Shape of third segment of fifth legs";tapering;tapering;conical;tapering;"tapering, short";"tapering, short";"tapering, short" "Large spinules of third segment of fifth legs";absent;absent;absent;absent;present;present;absent "Outer seta on third segment of fifth legs";present;absent;present;present;present;present;present "Terminal distal part of the segment of fifth legs";"curved, distal potion bordered by coarse teeth";"curved, strongly serrate process apically";"scarcely denticles on distal half of lateral margin";"scattered denticles both side";"scattered denticles both side";"scattered denticles both side";"finely serrated fringe on outer margin" Male "Body length (mm)";0.703;1.75;1.05;0.82–0.9;0.59–0.64;–;0.78 "Posterolateral corners";symmetrical;asymmetrical;–;asymmetrical;symmetrical;–;symmetrical "Shape of genital somite";"asymmetrical, with genital aperture on the left";–;symmetrical;asymmetrical;symmetrical;–;symmetrical "Antennule extention";"distal margin of fifth pedigerous end";"second abdominal segment end";"distal margin of fifth pedigerous end";"end of caudal rami";"about to posterior border of genital somite";–;"approximately to posterior margin of genital somite" "Type of left segment of P5";"left segment 4 narrow";"left segment 4 narrow, segment 5 bufurcate without leaf–like elements";"left segment 4 swollen, segment 5 with leaf–like elements";"left segment 4 swollen, segment 5 with leaf–like elements";"left segment 4 swollen";–;"left segment 4 swollen, segment 5 with leaf–like elements" Character;"Stephos deichmannae Fleminger, 1957";"Stephos exumensis Fosshagen, 1970";"Stephos fernandoi Suárez-Morales, Gutiérrez-Aguirre, Cervantes-Martínez & Illife, 2017";"Stephos fortipes sp. nov.";"Stephos fultoni Scott T. & Scott A., 1898";"Stephos geojinensis Moon et al., 2015";"Stephos grieveae Kršinić, 2015" Female "Body length (mm)";0.62–0.73;0.73;0.47;1.12;1.00;0.88;0.60–0.67 "Posterolateral corners";asymmetrical;asymmetrical;symmetrical;symmetrical;symmetrical;symmetrical;"slightly asymmetrical" "Shape of genital double–somite";asymmetrical;"asymmetrical, protruding lobe on left side";symmetrical;asymmetrical;symmetrical;"asymmetrical, protruding lobe on both side";symmetrical "Operculum shape of genital double–somite";–;–;rounded;rounded;–;rounded;rounded "Ornamentation of genital double–somite";present;present;"4 slender spiniform elements on ventral surface";"row of minute spinules on ventral surface";absent;"row of spinules on ventral surface";absent "Antennule extention";–;–;"posterior margin of preanal somite";"distal margin of genital double–somite";"distal half of genital double–somite";"distal margin of second urosomite";"distal margin of third urosomite" "Row of spinules on basis of fifth legs";present;present;absent;present;absent;absent;absent "Shape of third segment of fifth legs";tapering;tapering;cylindrical;"tapering, stout";"asymmetrical, right leg longer than left";"tapering, elongated";"tapering, elongated" "Large spinules of third segment of fifth legs";absent;present;absent;present;absent;absent;absent "Outer seta on third segment of fifth legs";absent;absent;absent;"present (spine)";absent;present;present "Terminal distal part of the segment of fifth legs";"row of spinules on distal half of lateral margin";"finely serrated fringe on outer margin";"spiniform bipinated apical process";"distal potion bordered by fringe teeth";"broad knife–like shape of right leg";"coarsely serrated spine incorporated distally";"single small spine on anterior surface" Male "Body length (mm)";0.61–0.66;–;0.49;–;1;0.819;0.55–0.62 "Posterolateral corners";asymmetrical;–;symmetrical;–;symmetrical;symmetrical;symmetrical "Shape of genital somite";asymmetrical;–;symmetrical;–;symmetrical;"asymmetrical, with lateral lone at each side";"slightly asymmetrical" "Antennule extention";–;–;"beyond distal margin of second urosomite";–;–;"distal margin of second urosomite";"distal margin of third urosomite" "Type of left segment of P5";"left segment 4 swollen";–;"left segment 4 narrow, segment 5 bufurcate without leaf–like elements";–;"left segment 4 swollen";"left segment 4 narrow";"left segment 4 narrow" Character;"Stephos gyrans (Giesbrecht, 1893)";"Stephos hastatus Bradford-Grieve, 1999";"Stephos jejuensis sp. nov.";"Stephos kurilensis Kos, 1972";"Stephos lamellatus Sars G.O., 1902";"Stephos longipes Giesbrecht, 1902";"Stephos lucayensis Fosshagen, 1970" Female "Body length (mm)";0.9–1.0;1.06;0.92;1.32;1.00;0.75–0.80;0.63–0.71 "Posterolateral corners";symmetrical;asymmetrical;asymmetrical;asymmetrical;asymmetrical;–;asymmetrical "Shape of genital double–somite";asymmetrical;asymmetrical;"asymmetrical, protruding lobe";"asymmetrical, swollen on the left side";asymmetrical;"symmetrical, triangular swollen on both sides";"Asymmetrical, slightly more swollen on the left than on the right side" "Operculum shape of genital double–somite";–;triangular;bumpy;–;–;–;– "Ornamentation of genital double–somite";"row of spinules anteriorly on ventral surface";"weak spine on right anterior margin";–;absent;absent;present;present "Row of spinules/setules on the dorsal surface of caudal rami";absent;"distal margin of fifth pedigerous somite";"distal margin of genital double–somite";"genital double–somite proximally";–;absent;– "Antennule extention";–;present;present;absent;"distal margin of caudal rami";–;– "Row of spinules on basis of fifth legs";absent;tapering;tapering;tapering;absent;absent;present "Shape of third segment of fifth legs";"tapering, curved";absent;absent;present;tapering;"tapering, curved";tapering "Large spinules of third segment of fifth legs";present;present;absent;present;present;absent;present "Outer seta on third segment of fifth legs";absent;"striated hyaline";"row of spinules across near the middle part";"strongly serrate process apically";present;present;absent "Terminal distal part of the segment of fifth legs";"strongly serrate process apically";;;;"strongly serrate process apically";"strongly serrate process apically";"strongly serrate process apically" Male;;0.943;0.93;1.24;;; "Body length (mm)";–;symmetrical;asymmetrical;asymmetrical;1.0mm;0.65–0.70;0.58–0.68 "Posterolateral corners";symmetrical;"asymmetrical, with genital aperture on the left";"asymmetrical, with protruding lobe on the left side";"slightly asymmetrical";symmetrical;symmetrical;"slightly asymmetrical" "Shape of genital somite";–;"distal margin of fifth pedigerous end";"distal margin of genital double–somite";"distal margin of fifth pedigerous end";symmetrical;asymmetrical;asymmetrical "Antennule extention";"distal margin of second urosomite";"left segment 4 swollen";"left segment 4 narrow";"left segment 4 swollen";"distal margin of caudal rami";–;– "Type of left segment of P5";"left leg 4 swollen, segment 5 with leaf–like elements";"leg segment 4 swollen";"left leg segment 4 narrow";"left segmeht 4 swollen";"left segment 4 swollen";"left segment 4 narrow, segment 5 bifurcate without lelf–like elements";"left segment 4 swollen" Character;"Stephos maculosus Andronov, 1974";"Stephos margalefi Riera, Vives & Gili, 1991";"Stephos marsalensis Costanzo, Campolmi & Zagami, 2000";"Stephos minor Scott T., 1892";"Stephos morii Greenwood, 1978";"Stephos pacificus Ohtsuka and Hiromi, 1987";"Stephos pentacanthos Chen and Zhang, 1965" Female "Body length (mm)";0.86;0.77–0.80;0.76;0.73;–;0.73;– "Posterolateral corners";"slightly asymmetrical";symmetrical;"Slightly symmetrical";"slightly asymmetrical";–;symmetrical;– "Shape of genital double–somite";symmetrical;symmetrical;symmetrical;symmetrical;–;symmetrical;– "Operculum shape of genital double–somite";–;–;–;–;–;–;– "Ornamentation of genital double–somite";absent;–;"Row of minute spinules dorsolaterally";–;–;"row of minute spinules on both side";– "Antennule extention";"distal margin of caudal rami";"distal margin of second urosomite";"Posterior margin of first urosomite";"beyond of genital double– somite";–;"fifth pedigerous end";– "Row of spinules on basis of fifth legs";absent;absent;absent;absent;–;present;– "Shape of third segment of fifth legs";"tapering, curved";"tapering, stouted";asymmetrical;"tapering, stouted";–;tapering;– "Large spinules of third segment of fifth legs";absent;absent;present;absent;–;absent;– "Outer seta on third segment of fifth legs";absent;present;absent;present;–;absent;– "Terminal distal part of the segment of fifth legs";"strongly serrate process apically";"strongly serrate process apically";"right segment sickle–shaped with patch of spinules on proximal anterior surface";"scarcely denticuls on distal half of lateral margin";–;"striated hyaline";– Male "Body length (mm)";0.54;0.74;0.73;0.6;0.85;0.62;0.75 "Posterolateral corners";"slightly asymmetrical";asymmetrical;symmetrical;symmetrical;asymmetrical;"slightly asymmetrical";"asymmetrical, produced" "Shape of genital somite";symmetrical;asymmetrical;symmetrical;symmetrical;"asymmetrical, more rounded on left side than right";"asymmetrical with protruding lone on left side";– "Antennule extention";"distal margin of fourth urosimite";–;"Posterior margin of second urosomite";"end of last pedigerous somite";"distal margin of third urosomite";"distal margin of fifth pedigerous somite";"distal margin of second urosomite" "Type of left segment of P5";"left leg segment 4 swollen";"left segment 4 swollen";"left segment 4 narrow";"left segment 4 swollen";"left segment 4 narrow";"left segment 4 narrow";"left segment 4 narrow" Character;"Stephos projectus Moon et al., 2015";"Stephos robustus Ohtsuka and Hiromi, 1987";"Stephos rustadi Strömgren, 1969";"Stephos scotti Sars, 1902";"Stephos tropicus Mori, 1942";"Stephos tsuyazakiensis Tanaka, 1967";"Stephos vivesi Jaume, Boxshall & Gràcia, 2008" Female "Body length (mm)";1.51;1.01;0.68;0.95;0.82;0.78;0.45 "Posterolateral corners";asymmetrical;asymmetrical;symmetrical;symmetrical;symmetrical;asymmetrical;"slightly asymmetrical" "Shape of genital double–somite";"asymmetrical, elongated";"asymmetrical, lateral swelling on both sides";"asymmetrical, lateral swelling on both sidess";symmetrical;–;"swellon on the left side";symmetrical "Operculum shape of genital double–somite";bumpy;fringed;–;–;–;–;"paired genital opercular plates" "Ornamentation of genital double–somite";"patch spinules on dorsal surface";"row of spinules on anterior margin";–;absent;–;"left side with minute spinules";"row of spinules on ventrolateral and dorsolateral margin" "Antennule extention";"distal margin of fifth pedigerous somite";"distal margin of fifth pedigerous";"beyond of fifth pedigerousn somite";"distal margin of second urosomite";–;"distal margin of genital segment";"beyond posterior margin of fifth pedigerous somite" "Row of spinules on basis of fifth legs";absent;present;absent;absent;absent;–;absent "Shape of third segment of fifth legs";"tapering, elongated";tapering;absent;tapering;tapering;tapering;"tapering, stout" "Large spinules of third segment of fifth legs";absent;present;absent;absent;absent;present;absent "Outer seta on third segment of fifth legs";present;present;present;present;absent;absent;present "Terminal tapering part of the segment of fifth legs";"curved, distal potion furnished";"curved, distal potion both sides";"finely serrated fringe on outer margin";"row of denticles on distal margin";"finely serrated fringe on outer margin";"row of spinules on distal margin";"two rows of denticles on distal part" Male "Body length (mm)";0.93;0.91;0.62;0.85;0.73;0.73;0.44–0.45 "Posterolateral corners";"asymmetrical, with lateral lobe on left margin";asymmetrical;symmetrical;–;–;"asymmetrical, slightly produced on the left side";"slightly asymmetrical" "Shape of genital double–somite";"asymmetrical with protruding lone on left side";"asymmetrical, spinules on lateral margin";symmetrical;–;–;"asymmetrical, produced on the left side";"asymmetrical, produced laterally on left side" "Antennule extention";"distal margin of fifth pedigerous somite";"distal margin of fifth pedigerous somite";"distal margin of third urosomite";"distal margin of third urosomite";"distal margin of second urosomite";"distal margin of second urosomite";"beyond posterior margin of fifth pedigerous somite" "Type of left segment of fifth leg";"left segment 4 swollen";"left segment 4 swollen";"left segment 4 narrow";"left segment 4 swollen";"left segment 4 swollen";"left segment 4 narrow";"left segment 4 narrow"