DOI: 10.5281/zenodo.15142211
title: Table 1 in Three new species of the genus Stephos Scott, 1892 (Crustacea, Copepoda, Calanoida, Stephidae) from Jeju Island, Korea

description: Table 1. Comparison of morphological characteristics of Stephos spp.
CharacterStephos angulatus Bradford-Grieve, 1999Stephos antarcticum Wolfenden, 1908Stephos arcticus Sars, 1909Stephos boettgerschnackae Krsinic, 2012Stephos canariensis Boxshall, Stock & Sanchez, 1990Stephos concavus sp. nov.Stephos cryptospinosus Zagami, Campolimi & Costanzo, 2000FemaleBody length (mm)0.821.85-2.01.200.89-0.930.64-0.690.930.86Posterolateral cornerssymmetricalslightly asymmetricalslightly asymmetricalasymmetricalasymmetricalasymmetricalsymmetricalShape of genital double-somiteasymmetricalsymmetrical, lateral swelling on both sideasymmetrical, lateral swelling on left sidesymmetricalslightly asymmetricalasymmetrical, convex on posterior cornersymmetricalOperculum shape of genital double-somitetriangular---roundedslightly roundedslightly roundedOrnamentation of genital double-somitefringe of fine spinules on left sidelong spines on both side--absentleft side with 7 row spinulesabsentAntennule extentiondistal margin of first abdominal segmentdistal margin of second abdominal segmentdistal margin of fifth pedigerous somitedistal margin of caudal ramidistal margin of fifth pedigerous somitedistal margin of genital double-somitedistal margin of fifth pedigerous somiteRow of spinules on basis of fifth legsabsentabsentabsentabsentpresentabsentpresentShape of third segment of fifth legstaperingtaperingconicaltaperingtapering, shorttapering, shorttapering, shortLarge spinules of third segment of fifth legsabsentabsentabsentabsentpresentpresentabsentOuter seta on third segment of fifth legspresentabsentpresentpresentpresentpresentpresentTerminal distal part of the segment of fifth legscurved, distal potion bordered by coarse teethcurved, strongly serrate process apicallyscarcely denticles on distal half of lateral marginscattered denticles both sidescattered denticles both sidescattered denticles both sidefinely serrated fringe on outer marginMaleBody length (mm)0.7031.751.050.82-0.90.59-0.64-0.78Posterolateral cornerssymmetricalasymmetrical-asymmetricalsymmetrical-symmetricalShape of genital somiteasymmetrical, with genital aperture on the left-symmetricalasymmetricalsymmetrical-symmetricalAntennule extentiondistal margin of fifth pedigerous endsecond abdominal segment enddistal margin of fifth pedigerous endend of caudal ramiabout to posterior border of genital somite-approximately to posterior margin of genital somiteType of left segment of P5left segment 4 narrowleft segment 4 narrow, segment 5 bufurcate without leaf-like elementsleft segment 4 swollen, segment 5 with leaf-like elementsleft segment 4 swollen, segment 5 with leaf-like elementsleft segment 4 swollen-left segment 4 swollen, segment 5 with leaf-like elementsCharacterStephos deichmannae Fleminger, 1957Stephos exumensis Fosshagen, 1970Stephos fernandoi Suárez-Morales, Gutiérrez-Aguirre, Cervantes-Martínez & Illife, 2017Stephos fortipes sp. nov.Stephos fultoni Scott T. & Scott A., 1898Stephos geojinensis Moon et al., 2015Stephos grieveae Kršinić, 2015FemaleBody length (mm)0.62-0.730.730.471.121.000.880.60-0.67Posterolateral cornersasymmetricalasymmetricalsymmetricalsymmetricalsymmetricalsymmetricalslightly asymmetricalShape of genital double-somiteasymmetricalasymmetrical, protruding lobe on left sidesymmetricalasymmetricalsymmetricalasymmetrical, protruding lobe on both sidesymmetricalOperculum shape of genital double-somite--roundedrounded-roundedroundedOrnamentation of genital double-somitepresentpresent4 slender spiniform elements on ventral surfacerow of minute spinules on ventral surfaceabsentrow of spinules on ventral surfaceabsentAntennule extention--posterior margin of preanal somitedistal margin of genital double-somitedistal half of genital double-somitedistal margin of second urosomitedistal margin of third urosomiteRow of spinules on basis of fifth legspresentpresentabsentpresentabsentabsentabsentShape of third segment of fifth legstaperingtaperingcylindricaltapering, stoutasymmetrical, right leg longer than lefttapering, elongatedtapering, elongatedLarge spinules of third segment of fifth legsabsentpresentabsentpresentabsentabsentabsentOuter seta on third segment of fifth legsabsentabsentabsentpresent (spine)absentpresentpresentTerminal distal part of the segment of fifth legsrow of spinules on distal half of lateral marginfinely serrated fringe on outer marginspiniform bipinated apical processdistal potion bordered by fringe teethbroad knife-like shape of right legcoarsely serrated spine incorporated distallysingle small spine on anterior surfaceMaleBody length (mm)0.61-0.66-0.49-10.8190.55-0.62Posterolateral cornersasymmetrical-symmetrical-symmetricalsymmetricalsymmetricalShape of genital somiteasymmetrical-symmetrical-symmetricalasymmetrical, with lateral lone at each sideslightly asymmetricalAntennule extention--beyond distal margin of second urosomite--distal margin of second urosomitedistal margin of third urosomiteType of left segment of P5left segment 4 swollen-left segment 4 narrow, segment 5 bufurcate without leaf-like elements-left segment 4 swollenleft segment 4 narrowleft segment 4 narrowCharacterStephos gyrans (Giesbrecht, 1893)Stephos hastatus Bradford-Grieve, 1999Stephos jejuensis sp. nov.Stephos kurilensis Kos, 1972Stephos lamellatus Sars G.O., 1902Stephos longipes Giesbrecht, 1902Stephos lucayensis Fosshagen, 1970FemaleBody length (mm)0.9-1.01.060.921.321.000.75-0.800.63-0.71Posterolateral cornerssymmetricalasymmetricalasymmetricalasymmetricalasymmetrical-asymmetricalShape of genital double-somiteasymmetricalasymmetricalasymmetrical, protruding lobeasymmetrical, swollen on the left sideasymmetricalsymmetrical, triangular swollen on both sidesAsymmetrical, slightly more swollen on the left than on the right sideOperculum shape of genital double-somite-triangularbumpy----Ornamentation of genital double-somiterow of spinules anteriorly on ventral surfaceweak spine on right anterior margin-absentabsentpresentpresentRow of spinules/setules on the dorsal surface of caudal ramiabsentdistal margin of fifth pedigerous somitedistal margin of genital double-somitegenital double-somite proximally-absent-Antennule extention-presentpresentabsentdistal margin of caudal rami--Row of spinules on basis of fifth legsabsenttaperingtaperingtaperingabsentabsentpresentShape of third segment of fifth legstapering, curvedabsentabsentpresenttaperingtapering, curvedtaperingLarge spinules of third segment of fifth legspresentpresentabsentpresentpresentabsentpresentOuter seta on third segment of fifth legsabsentstriated hyalinerow of spinules across near the middle partstrongly serrate process apicallypresentpresentabsentTerminal distal part of the segment of fifth legsstrongly serrate process apicallystrongly serrate process apicallystrongly serrate process apicallystrongly serrate process apicallyMale0.9430.931.24Body length (mm)-symmetricalasymmetricalasymmetrical1.0mm0.65-0.700.58-0.68Posterolateral cornerssymmetricalasymmetrical, with genital aperture on the leftasymmetrical, with protruding lobe on the left sideslightly asymmetricalsymmetricalsymmetricalslightly asymmetricalShape of genital somite-distal margin of fifth pedigerous enddistal margin of genital double-somitedistal margin of fifth pedigerous endsymmetricalasymmetricalasymmetricalAntennule extentiondistal margin of second urosomiteleft segment 4 swollenleft segment 4 narrowleft segment 4 swollendistal margin of caudal rami--Type of left segment of P5left leg 4 swollen, segment 5 with leaf-like elementsleg segment 4 swollenleft leg segment 4 narrowleft segmeht 4 swollenleft segment 4 swollenleft segment 4 narrow, segment 5 bifurcate without lelf-like elementsleft segment 4 swollenCharacterStephos maculosus Andronov, 1974Stephos margalefi Riera, Vives & Gili, 1991Stephos marsalensis Costanzo, Campolmi & Zagami, 2000Stephos minor Scott T., 1892Stephos morii Greenwood, 1978Stephos pacificus Ohtsuka and Hiromi, 1987Stephos pentacanthos Chen and Zhang, 1965FemaleBody length (mm)0.860.77-0.800.760.73-0.73-Posterolateral cornersslightly asymmetricalsymmetricalSlightly symmetricalslightly asymmetrical-symmetrical-Shape of genital double-somitesymmetricalsymmetricalsymmetricalsymmetrical-symmetrical-Operculum shape of genital double-somite-------Ornamentation of genital double-somiteabsent-Row of minute spinules dorsolaterally--row of minute spinules on both side-Antennule extentiondistal margin of caudal ramidistal margin of second urosomitePosterior margin of first urosomitebeyond of genital double- somite-fifth pedigerous end-Row of spinules on basis of fifth legsabsentabsentabsentabsent-present-Shape of third segment of fifth legstapering, curvedtapering, stoutedasymmetricaltapering, stouted-tapering-Large spinules of third segment of fifth legsabsentabsentpresentabsent-absent-Outer seta on third segment of fifth legsabsentpresentabsentpresent-absent-Terminal distal part of the segment of fifth legsstrongly serrate process apicallystrongly serrate process apicallyright segment sickle-shaped with patch of spinules on proximal anterior surfacescarcely denticuls on distal half of lateral margin-striated hyaline-MaleBody length (mm)0.540.740.730.60.850.620.75Posterolateral cornersslightly asymmetricalasymmetricalsymmetricalsymmetricalasymmetricalslightly asymmetricalasymmetrical, producedShape of genital somitesymmetricalasymmetricalsymmetricalsymmetricalasymmetrical, more rounded on left side than rightasymmetrical with protruding lone on left side-Antennule extentiondistal margin of fourth urosimite-Posterior margin of second urosomiteend of last pedigerous somitedistal margin of third urosomitedistal margin of fifth pedigerous somitedistal margin of second urosomiteType of left segment of P5left leg segment 4 swollenleft segment 4 swollenleft segment 4 narrowleft segment 4 swollenleft segment 4 narrowleft segment 4 narrowleft segment 4 narrowCharacterStephos projectus Moon et al., 2015Stephos robustus Ohtsuka and Hiromi, 1987Stephos rustadi Strömgren, 1969Stephos scotti Sars, 1902Stephos tropicus Mori, 1942Stephos tsuyazakiensis Tanaka, 1967Stephos vivesi Jaume, Boxshall & Gràcia, 2008FemaleBody length (mm)1.511.010.680.950.820.780.45Posterolateral cornersasymmetricalasymmetricalsymmetricalsymmetricalsymmetricalasymmetricalslightly asymmetricalShape of genital double-somiteasymmetrical, elongatedasymmetrical, lateral swelling on both sidesasymmetrical, lateral swelling on both sidesssymmetrical-swellon on the left sidesymmetricalOperculum shape of genital double-somitebumpyfringed----paired genital opercular platesOrnamentation of genital double-somitepatch spinules on dorsal surfacerow of spinules on anterior margin-absent-left side with minute spinulesrow of spinules on ventrolateral and dorsolateral marginAntennule extentiondistal margin of fifth pedigerous somitedistal margin of fifth pedigerousbeyond of fifth pedigerousn somitedistal margin of second urosomite-distal margin of genital segmentbeyond posterior margin of fifth pedigerous somiteRow of spinules on basis of fifth legsabsentpresentabsentabsentabsent-absentShape of third segment of fifth legstapering, elongatedtaperingabsenttaperingtaperingtaperingtapering, stoutLarge spinules of third segment of fifth legsabsentpresentabsentabsentabsentpresentabsentOuter seta on third segment of fifth legspresentpresentpresentpresentabsentabsentpresentTerminal tapering part of the segment of fifth legscurved, distal potion furnishedcurved, distal potion both sidesfinely serrated fringe on outer marginrow of denticles on distal marginfinely serrated fringe on outer marginrow of spinules on distal margintwo rows of denticles on distal partMaleBody length (mm)0.930.910.620.850.730.730.44-0.45Posterolateral cornersasymmetrical, with lateral lobe on left marginasymmetricalsymmetrical--asymmetrical, slightly produced on the left sideslightly asymmetricalShape of genital double-somiteasymmetrical with protruding lone on left sideasymmetrical, spinules on lateral marginsymmetrical--asymmetrical, produced on the left sideasymmetrical, produced laterally on left sideAntennule extentiondistal margin of fifth pedigerous somitedistal margin of fifth pedigerous somitedistal margin of third urosomitedistal margin of third urosomitedistal margin of second urosomitedistal margin of second urosomitebeyond posterior margin of fifth pedigerous somiteType of left segment of fifth legleft segment 4 swollenleft segment 4 swollenleft segment 4 narrowleft segment 4 swollenleft segment 4 swollenleft segment 4 narrowleft segment 4 narrow
description: Published as part of Moon, Seong Yong, Soh, Ho Young & Cho, Dae Hyun, 2020, Three new species of the genus Stephos Scott, 1892 (Crustacea, Copepoda, Calanoida, Stephidae) from Jeju Island, Korea, pp. 1 in ZooKeys 944 on page 1, DOI: 10.3897/zookeys.944.49361