Table 2 in A report of a new species and new record of Cadlina (Nudibranchia, Cadlinidae) from South Korea

Table 2. Morphological comparison among Cadlina species in the northwestern Pacific region.
SpeciesLocalitySizeMorphologyRadular formulaRachidian toothFirst lateral teethMid-lateral teethOuter lateral teethAmpullaVas deferensVaginaBursa copulatrix and receptaculum seminisSource of informationCadlina koreanaMunamjin-ri, South Korea9-14 mmTranslucent white; dorsum covered with small white tubercles; small white specs present on mantle edge. No yellow marginal band57 × 23.1.23Rectangular, hook-shaped, 2 longer central denticles, and 2 shorter lateral denticles1 cusp, 2 short inner denticles, and 3-4 outer denticles.Hamate, comb-shaped, up to 7 denticlesHamate, comb-shaped, 5-7 denticles.Moderate and convolutedLong and narrowRelatively long and narrowOvate and ca. 1.5 × larger than receptaculum seminisThis studyCadlina umiushiMunamjin-ri, South Korea8-9 mmWhite background; numerous small yellow tubercles; yellow marginal band55 x 16.1.16Trapezoid, hook-shaped, 2 central denticles, and 2 lateral denticles1 cusp, 2 inner denticles, and 3 outer denticlesHamate, rather comb-shaped, 6-8 distinct outer denticles.Hamate to straight, up to 10 inconspicuous denticlesLong and convolutedRelatively shortRelatively short and broadOvate and ca. 2 × larger than receptaculum seminisThis studyCadlina japonicaMunamjin-ri and Yeonji-ri, South Korea48-55 mmYellowish with dark brown patches; small scattered yellow spots; yellow marginal band88 x 71.1.71Elongate, 2-4 lobe-like denticles1 bigger cusp, 3-4 inner denticles, and 4-6 outer denticlesHook-shaped, no inner denticle and 3-5 outer denticlesHook-shaped, bearing up to 6 denticlesModerate and convolutedLong, narrow and distinctRelatively short and narrowAlmost rectangular in shape, ca. 5 × larger than receptaculum seminisThis studyCadlina kamchaticaKamchatka, Starichkov Island, Russia37 mmCreamy to dark yellow/light brown; small, low rounded yellow tubercles82 × 35.1.35Moderately high, trapezoid, 5-6 denticles, 2 middle usually larger than outer ones1 cusp, 4-6 large inner denticles, 5-6 distinct outer denticlesHamate, comb-shaped, up to 17 distinct outer denticles onlyHamate reduced, up to 19 sharp denticlesLong and convolutedRelatively shortLong and narrowPear-shaped, 2 × larger than receptaculum seminisKorshunova et al. (2020)Cadlina paninaeMatua Islands, Middle Kurile Islands, Russia29 mmOpaque whitish, sometimes with some yellowish shadow; low indistinct tubercles90 × 38.1.38Low rectangular, 3-5 distinct cusps, often bifurcated at tips1 cusp, 2-3 inner denticles and 3-4 outer denticlesElongate hook-shaped, up to 20 comb-shaped denticlesHook-shaped, up to 20 comb-shaped denticlesRelatively short and slightly convolutedLong and narrowLong and narrowOvate, 1.5 × larger than receptaculum seminisKorshunova et al. (2020)