Table 2 in A new species of Synagoga (Crustacea, Thecostraca, Ascothoracida) parasitic in an antipatharian from Green Island, Taiwan, with notes on its morphology

Table 2. Main diagnostic characters of species of the genus Synagoga (modified from Kolbasov and Newman 2018). The finding of S. normani on alcyonarian Dendronephthya is questioned, because all other congeners attributed to hosts were found on antipatharians.
Species charactersS. mira Norman, 1888S. normani Grygier, 1983S. sp. of Grygier 1988S. bisetosa Grygier, 1990S. millipalus Grygier & Ohtsuka, 1995S. paucisetosa Grygier, 1990S. grygieri Kolbasov & Newman, 2018S. arabesque sp. nov.Location, host, number and size of specimensNaples, depth unknown, on Parantipathes larix, several males, 4 × 3 mmMombasa, 20 m, on Dendronephthya (?), single female, 1.73 × 1.32 mmoff West Australia, in plankton, host unknown, juvenile, 0.79 × 0.53 mmoutside Gibraltar, ca. 2000 m, host unknown, single immature female, probably male (has male penis), 2.8 × 2.2 mmoff Okinawa, between 575 m and surface, host unknown, single male, 1.7 × 1.25 mmequatorial mid-Atlantic, 3459 m, host unknown, single male, 2.04 × 1.64 mmAzores & Cape Verde Is, 20-40 m, on Antipathella wollastoni, males & females (app. 3+7), (1.8 × 1.25mm - male, 2.5 × 2.0 mm - female)Green Island, off east Taiwan, 35 m, on Myriopathes sp., males & females (6+6), (1.5 × 0.9 mm - male, 2.3 × 2.0 mm - female)shape of 4th segment of a1Subtriangular (anteriorly acuminate)Triangular (posteriorly acuminate)RectangularRectangularTriangular (posteriorly acuminate)Triangular (posteriorly acuminate)Rectangular in male, triangular (posteriorly acuminate) in femaleRectangular in male and femalearmament at base of massive setae of 4th segment of a1Many very short spinesVery short, single spineAbsentAbsentSingle spineSingle spineBoth sexes with several very short spines - ctenoid scalesBoth sexes with several very short spines - ctenoid scalesrelative sizes of 5th and 6th segments of a1approximately equal5th slightly shorter5th longerapproximately equal5th shorter5th shorterca. equal5th shorternumber of setae on anterior margin of 5th segment of a1155510339 (female)6-9 (female)8 (male)4-6 (male)number of setae on 2ndexopodal segment of T11891110557 (female)7 (female)9 (male)8 (male)length of telson spineMedian lengthMedian lengthMedian lengthShortVery longVery longMedian lengthShortnumber of medial setae on inner face of furcal ramus~145 or 63133368 (female)6 (male)gut diverticulaLow, frilly W-shape without major bifurcationsW-shaped with anterior and posterior arms bi- and tri-furcate respectivelyNone mentionedRounded WNot observedRounded WW-shaped with numerous branches in females. Males with less elaborate W-shapeW-shaped with numerous branches in females. Males with less elaborate W-shapeposition of aesthetasc seta of proximal sensory process of a1Subbasal?SubbasalBasalTerminalBasalSubbasalSubbasalSubbasalnumber and size of terminal setae on ramus of male penis?InapplicableInapplicable2 tiny4 longFew (3?) medium2 medium2 medium