Table 2 in First record of the genus Staurocladia (Hydrozoa: Cladonematidae) in the Gulf of Mexico with the description of Staurocladia dzilamensis sp. nov., a new species of crawling hydromedusa

Table 2 (continued on next two pages). Comparison of the diagnostic characters of the medusae of Staurocladia Hartlaub, 1917. Data compiled from: Browne (1902), Bedot (1908), Briggs (1920), Edmonson (1930), Kramp (1959, 1961, 1968), Brinckmann-Voss (1964), Bouillon (1978), Schuchert (1996, 2006), Hirano et al. (2000, 2006), Galea & Schories (2012a, 2012b).
TaxaUmbrellaManubriumNematocysts ringMedusa budsBrood chamberTentaclesNematocyst clustersCnidome (μm)DistributionS. dzilamensis sp. nov.0.2–0.6 mm; brown-olive colouredConical, occupying a great part of the subumbrellar cavity, lacking either nematocyst knobs or pouchesPresent. Continuous and thickenedExumbrellar, dorsally locatedAbsent6–11 (usually 8). Lower branch about 2 times as long as the upper oneApical + two extra crescent- shaped, oppositely arranged, placed on both oral and aboral sidesStenoteles of two size classes (15.00– 17.50) × (12.50– 15.00), and 10.00 × 7.50. Desmonemes 7.50 × 5.00Gulf of MexicoS. acuminata (Edmonson, 1930)0.8 mm; pearl-white (reflected light), brown (transmitted light)Tubular, extensible, apparently lacking either nematocyst knobs or pouches; gonads on surface“A marginal ring of thickened epidermis that contained many nematocysts on the oral surface”Absent“A dorsal brood pouch that opens into the bell-cavity by a variable number of pores”11-25. Upper branch as long or slightly longer than the lower oneApical + 2 aboral + 1 oral + 1 pair of lateralsLarge stenoteles 24.90 ± 0.80 × 17.30 ± 0.40; small stenoteles 14.30 ± 0.40 × 9.50 ± 0.20; desmonemes 9.70 ± 0.20 × 4.80 ± 0.10Hawaii, Papua New Guinea, JapanS. alternata (Edmonson, 1930)0.8 mm; center dark-brown, clear elsewhereNot documentedNot documentedAbsentNo dataUp to 13. Upper branch longer than the lower oneApical + 6 alternating along a median, aboral lineNot availableHawaii, Papua New GuineaS. bilateralis (Edmonson, 1930)0.6 mm; brown colouredNot documentedNot documentedAbsent; asexual reproduction by fission“Dorsal to the stomach”As much as 20. Upper branch longer than the lower oneApical + 1 aboral + 1 pair of lateralsNot documentedHawaii, Japan, SeychellesS. charcoti (Bedot, 1908)Up to 8 mm; manubrium, endoderm of ring canals and tentacles orangeWith longitudinal creases, terminally crowded with nematocystsDiscontinuous. On the proximal-most oral side of the main stem of the lower tentacular branches, conspicuous pads of nematocysts clasping around for a certain distance of the circumference of the tentacles, not fused laterally to form a continuous ringAbsentAbsentUp to at least 65; upper branch longer than the lower oneApical + up to 32 alternating along a median, aboral lineNot documentedAntarctica, South Georgia, and Kerguelen