Table 1 in Revision of the Siriella brevicaudata species group (Crustacea: Mysida: Mysidae) from the West Indo-Pacific
Table 1. Comparison of diagnostic morphological characters among species of the Siriella brevicaudata group (bold type indicates unique character states).Species (in alphabetical order)CharactersS. bassi sp. nov.S. brevicaudataS. gibbosaS. hanseniS. lacertilisS. lingvura sp. nov.Anterior margin of carapace:- shapeangular; apically rounded; sides concaveroundedangular; apically acute; sides concaveroundedroundedrounded- frontal extension (coverage of subrostral process)covering at least half of process Ƌ: not covering; ♀: coveringcoveringnot coveringnot coveringnot coveringCephalic tuberclepresent; larger in ♂present; larger in ♀presentabsentpresentabsentPostcervical elevationpresent; larger in ♂present; larger in ♀presentabsentpresentabsentEye corneal colorunknownblackunknownunknownred-browndark purpleTelson:- length / last abdominal somite length1.0–1.10.9unknown1.0–1.10.70.9- length / anterior width2.35–2.51.5–1.71.31.6–1.91.71.6–1.8- anterior width/ posterior width*1.3–1.51.5–1.72.31.3–1.61.41.45–1.5- N of anterolateral spiniform setae3–4333–435–6- N of posterolateral spiniform setae15–204–7410–1699–11- terminal spiniform setal length /telsonal length0.07–0.080.36–0.530.310.09–0.130.250.13–0.14- terminal spiniform setal length /subterminal setal length♂: 1.0–1.2; ♀: 0.7–1.01.2–1.63.11.0–1.21.1–1.21.2–1.6- subterminal spiniform setal length to preceding posterolateral0.8–1.41.4– 3.11.2–1.81.0–1.21.8–2.01.1–1.4Telson:- pattern of posterior spiniform setaegraded, except terminal in most of ♀♀very long 2–3 last graded pairs against 3–4 short precedingvery long one pair against 3 short precedingnearly equal 3–6 last pairs, gradually grading into posterolateralvery long 2 last graded pairs against 7 short precedinggraded- emarginationabsentpresentabsentabsentabsentabsent- apical spinulessmall, dorsally visiblevery small, dorsally invisiblesmall, dorsally visiblesmall, dorsall visiblesmall, dorsally visiblesmall, dorsally visible- length of apical spinules / terminal spiniform setae0.3–0.50.03–0.080.090.2–0.30.13–0.160.19–0.23Labral anterior spine length / rest of labral length0.25–0.3<0.1absent (?)<0.10.1–0.150.15Maxilla 1, outer ramus robust setaeserratedsmoothsmoothsmoothserratedsmoothMaxilla 2, N of endopod lateral setae2523–443–4Pereopods 1–3, meral length / width ratio4.3–4.43.0–3.33.23.5–4.44.13.5Uropods:- exopod length / width ratio3.8–4.03.1–3.42.93.8–4.03.93.6–3.7- N of exopodal spiniform setae4–83–54–53–634–5- ratio of length of exopodal segments1.9–2.02.8–3.02.71.9–2.31.4–1.51.8–2.2- N of endopodal spiniform setae22–2910–12310–1314–1515–16- pattern of endopodal spiniform setaealong entire margin, terminal reaching apex; medially in pairsalong almost entire margin, not reaching apexalong proximal half of marginalong almost entire margin, not reaching apexalong almost entire margin, not reaching apexalong almost entire margin, not reaching apexAnterior margin of carapace:- shaperoundedangular; sides straightangular, apically rounded; sides concaveroundedweakly angular or nearly roundedangular, apically rounded sides concave- frontal extension (coverage of subrostral process)not coveringcoveringcovering at least half of processnot coveringnot coveringcovering at least half of processCephalic tuberclepresent; weakabsentabsentpresent; weakabsentpresent in ♀Postcervical elevationpresentpresentabsentpresentpresentpresent in ♀Eye corneal colorunknownunknownunknownwhite; three golden-yellow horizontal stripesbrown-goldblackTelson:- length / last abdominal somite length0.90.91.00.91.01.0–1.1- length / anterior width1.6–1.71.6–1.72.0–2.11.5–1.72.0–2.12.0–2.1- anterior width/ posterior width*1.51.51.41.51.3–1.41.3- N of anterolateral spiniform setae33–433–443–4- N of posterolateral spiniform setae10–169–1312–1411–1314–1710–16- terminal spiniform setal length / telsonal length0.13–0.140.20–0.230.13–0.140.18–0.190.090.11–0.13- terminal spiniform setal length / subterminal setal length1.0–1.11.1–1.3♂: 1.2; ♀: 0.81.3–1.41.3–1.40.9–1.0- subterminal spiniform setal length to preceding posterolateral1.21.1–1.2♂: 1.2; ♀: 1.4–1.51.41.1–1.21.1–1.2Telson:- pattern of posterior spiniform setae2 equal pairs longer than precedinggradedgraded, except terminal in ♀gradedgradedterminal shorter than or equal to subterminal- emarginationabsentpresentabsentabsentabsentabsent- apical spinulessmall, dorsally visiblevery small, dorsally invisiblesmall, dorsally visiblesmall, dorsally visiblesmall, dorsally visiblesmall, dorsally visible- length of apical spinules / terminal spiniform setae0.25–0.30.10.2–0.30.20.40.2–0.3Labral anterior spine length / rest of labral length0.2<0.10.15<0.10.25–0.30.2Maxilla 1, outer ramus robust setaesmoothsmoothserratedsmoothsmoothsmoothMaxilla 2, N of endopod lateral setae3–45–623–423–4Pereopods 1–3, meral length / width ratio3.8–4.13.1–3.34.2–4.83.1–3.43.4–3.54.6–5.0Uropods:- exopod length / width ratio4.23.64.03.9–4.03.5–3.73.6–3.9- N of exopodal spiniform setae3–54–63–4 in ♀; 4–5 in ♂3–54–63–4 in ♀; 4–6 in ♂- ratio of length of exopodal segments1.72.5–3.02.51.8–1.91.7–1.81.8–1.9- N of endopodal spiniform setae11–1415–2019–27 in ♀; 15–21 in ♂10–1317–1819–25 in ♀; 15–22 in ♂- pattern of endopodal spiniform setaealong almost entire margin, not reaching apexalong almost entire margin, not reaching apexalong entire margin, terminal reaching apexalong almost entire margin, not reaching apexalong entire margin, terminal not reaching apexalong entire margin, terminal reaching apex