TABLE 3 in A new subfamily of ulmarid scyphomedusae, the Santjordiinae, with a description of Santjordia pagesi gen. et sp. nov. (Cnidaria: Scyphozoa: Discomedusae: Semaeostomeae: Ulmaridae) from the Sumisu Caldera, Ogasawara Islands, Japan

TABLE 3. Summary of data and diagnostic characters for distinction of the currently recognized families of “ Semaeostomeae ” medusae. Spp. = number of valid species of the family/subfamily, if the literature mentions undescribed or doubtful species the number was put in brackets and followed by a question mark. Tentacles = presence or absence of tentacles and, if present, how they are organized. Gastrovascular cavity = organization of the cavity, with radial septa, radial canals, ring canal and branching of canals. Gonads = organization of gonads: inverted = contained inside the body; everted = parts of the gonads outside the body. Subgenital ostia = present or absent. Rhopalia = number and position of rhopalia; question mark (?) means that the character is not known for the genus or its state is doubtful. Mostly after: Mayer (1910); Kramp (1961); Russell (1970); Larson (1986); Mianzan & Cornelius (1999); Gershwin & Collins (2002); Matsumoto et al. (2003); Raskoff & Matsumoto (2004); Bayha & Dawson (2010); Morandini & Marques (2010); Straehler-Pohl et al. (2011); Jarms & Morandini (2019); Collins et al. (2022). * signifies character not described in original species description but visible in photograph in Jarms & Morandini (2019).
Family/ SubfamilyGeneraSpp.TentaclesRhopailaGastrovascular cavityGonadsSubgenital ostiaPelagiidae Gegenbaur, 1856Chrysaora15 (16?)present, 8, 24, 40, or more, marginal8, marginalradial septa, no canals but sometimes with canals on lappetsinverted horse-shoe sometimes protrudingpresentMawia1present, 8, marginal8 marginalradial septa, no canalsinverted horse-shoe always protrudingabsentPelagia1 (5?)present, 8, marginal8, marginalradial septa, no canalsinverted horse-shoe sometimes protrudingpresentSanderia2present, 16, marginal16, marginalradial septa, no canalsinverted horse-shoe always protrudingpresentCyaneidae Agassiz, 1862Cyanea10 (17?)present, many, subumbrellar groups8 marginalradial septa, canals on lappetsevertedabsentDesmonema4present,8 marginalradial septa,evertedabsentmany, subumbrellar groupscanals on lappetsDrymonematidae Haeckel, 1880Drymonema3present, many, subumbrellar zone8 subumbrellarradial septa, canals on lappetsevertedabsentPhacellophoridae Straehler-Pohl et al., 2011Phacellophora1 (3?)present, many, subumbrellar rows16 marginalunbranched and branched canalsevertedabsentUlmaridae Haeckel, 1880present or absentunbranched or branched canals, ring canal on margininverted or evertedpresent or absentAureliinae Agassiz, 1862Aurelia26 (more?)present, many, exumbrellar8 marginalbranched canalsinverted, horse-shoepresentAurosa1present, many, exumbrellar8 marginalbranched canalsinverted, horse-shoepresentPoraliinae Larson, 1986Poralia1 (3?)present,>50, marginal16? (12–30) marginalunbranched canals, ring canal away from margininverted, continuous ringabsentSthenoniinae Mayer, 1910Sthenonia1present, many, subumbrellar rows8 marginalunbranched and branched canalsevertedabsentUlmarinae Kramp, 1961Diplulmaris2present, 16– 48, marginal16 marginalunbranched and branched canalsevertedabsentDiscomedusa2present, 24– 48, marginal8 marginalunbranched and branched canalsevertedabsentFloresca1present, 24, marginal8 marginalunbranched canalsinverted?, horse-shoeabsentParumbrosa1present, 24, marginal8 marginalunbranched and branched canalseverted?absentUlmaris2present, 8, marginal8 marginalunbranched and branched canalsevertedabsentDeepstariinae Larson, 1986Deepstaria2absent8–20 marginalbranched canalson manubrium wallabsentStellamedusinae Raskoff & Matsumoto, 2004Stellamedusa1absent8 marginalunbranched canals, ring canal away from margin, centripetal canalsinverted, horse-shoepresentStygiomedusinae Russell & Rees, 1960Stygiomedusa1absent20 marginalbranched canalsinverted, horse-shoepresentTiburoniinae Matsumoto et al., 2003Tiburonia1absent~20–54+ marginalbranched canalseverted*presentSantjordiinae subfam. nov.Santjordia1present, many, subumbrellar rows8 marginal + 24 subumbrellarunbranched canals, ring canal away from margin?absent
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