DOI: 10.5281/zenodo.15146130
title: 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

description: Table 2 (continued). Comparison of 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. haswelli (Briggs, 1920)Up to 1.2 mm; reddish-yellow (transmitted light), bright red or orange (reflected light)Lacking oral tentacles or nematocyst knobs but around the edge of the month the ectoderm forms a thickened ridge, which bears large, well-developed nematocystsPresent. Thickened, uninterruptedExumbrellar, “arising from the circular canal between the tentacles and the nematocyst ring”AbsentUp to 31. Lower branch longer than the upper oneApical + 2 aboral + 1 oral + 1 cluster on aboral side of the main stem of tentacles behind the branching pointIdentity uncertain, but possibly stenoteles (23.00–25.00) × (17.00–19.00), and desmonemes 8.00 × 4.00Australia, SeychellesS. oahuensis (Edmonson, 1930)Up to 0.5 mm; brown or reddish brownNot documentedNot documentedAbsent; asexual reproduction by fission“Dorsal to the stomach communicating with the bell cavity by a series of small openings”As much as 20. Upper branch longer than the lower oneApical + 2 aboralApparently, a single type of stenotelesHawaii, JapanS. portmanni Brinckmann, 19644–6 mm; endoderm of manubrium, ring canal and tentacles, red-orangeWith five protruding stomach pouches in middle, mouth with five spherical nematocyst clustersPresent. ThickenedAbsentAbsent16–25. Upper branch as long as the lower one (based on figures of Brinckmann 1970)Apical + 2–5 aboral + 2–4 oral + 1 pair of lateral clusters proximal to the ramification of the tentacleSmall (15.00 × 12.00) and large (25.00 × 21.00) stenoteles. Desmonemes [(14.00–16.00) × (4.00–7.00)], and a large, unidentified capsule (haploneme?) [(18.00–28.00) × (6.00–12.00)]Mediterranean SeaS. schizogena Bouillon, 1978Up to 1.2 mm; mostly transparentNot documentedNot documentedAbsent. Asexual reproduction by fissionAbsent16–30. Branches of nearly the same length, lower branch slightly longer than the upper oneApical + 3–4 collinear on aboral surfaceLarge (18.60 × 12.60) and small (10.80 × 6.60) stenoteles. Desmonemes (9.60 × 4.20)SeychellesS. ulvae Bouillon, 197802–0.8 mmNot documentedNot documentedExumbrellarAbsent7–16. Upper branch up to twice as long as the lower oneApical + 2–3 aboral + 1–2 oralStenoteles of two size classes 20.00 × 16.00 and 12.00 × 8.50. Desmonemes of one size class 8.00 × 2.00SeychellesS. vallentini (Browne, 1902)Up to 3 mm; circular canal and gastric cavity orange, radial canals bright white; adhesive pads and clusters of nematocysts whiteWith gastric pouches as orange bodies. Lacking nematocyst knobsPresent. Continuous and thickenedExumbrellar, between velum and bell marginAbsentUp to 42. Upper branch longer than the lower oneApical + up to 4 collinear aborally + up to 3 collinear orallyStenoteles of three size classes (19.00–25.00) × (12.00–16.00), (14.00–15.50) × (8.50–10.50) and (11.00–13.00) × (7.00–9.00). Desmonemes (10.00–11.00) × (4.50–5.50)Falkland Islands, Chile, South Africa?, Japan?, Bermuda?, New Zealand?, and Mexico (Caribbean Sea)?S. wellingtoni Schuchert, 1996Up to 4 mmWith 5–6 mobile protrusions, mouth with 6 nematocyst knobs. Gonads of female brown- yellow opaque, in male olive-green transparent, gonads covered with black pigment towards the centre; lumen of tentacles and radial canal dark brown to black, apex of manubrium white; sucker pads light yellowAbsentAbsentAbsentUp to 55. Upper branch longer than the lower oneApical + up to 6 lateral, alternating clusters per sideStenoteles of four size classes (28.00–30.50) × (20.00–21.00), (17.50–24.00) × (13.00–15.00), (9.50–14.50) × (7.00–9.50), (7.00– 9.00) × (5.50–6.50). Desmonemes (10.50–14.50) × (4.00–6.00)New Zealand
description: Published as part of Ahuatzin-Hernández, José María, Hernández-Solís, Pablo Alberto & León-Deniz, Lorena Violeta, 2024, 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, pp. 264-265 in European Journal of Taxonomy 921 on page 264, DOI: 10.5852/ejt.2024.921.2433, http://zenodo.org/record/10705412