Colony forming upright pinnate shoots, mono- or polysiphonic, branched or unbranched, arising from creeping ... [details]

Medusa with cylindrical manubrium , with 4 simple lips; 4 radial canals, 4 groups of perradial tentacles and 4 ... [details]

Hydroid colony stolonal or erect, branching; hydrothecae bell- or cup-shaped, radially symmetrical, sometimes ... [details]

Medusa: marginal bulbs with large adaxial nematocyst pads; four similar perradial tentacles with abaxial stalked ... [details]

Freshwater Olindiidae medusae with closed ecto-endodermal statocysts in the velum which form centripetal tubes; ... [details]

Cuninidae with nine ore more tentacles and peronial strands; manubrial pouches equal in number to tentacles, but ... [details]

Siphonophores with a relatively large pneumatophore and without nectosome; pneumatophore with apical pore; siphosome ... [details]

Olindiidae medusa with 4 radial canals and several blind centripetal canals, nematocyst knobs on oral lips; ... [details]

Medusa with a distinct gastric peduncle; lateral cirri (difficult to observe and often destroyed after fixation); ... [details]

Eirenidae medusae with broad gastric peduncle; mouth with complexly folded, large lips; 8 adradial statocysts; ... [details]

Eirenidae medusa with 8 statocysts; without cirri; without marginal warts; gonads restricted to subumbrella, not ... [details]

Olindiidae medusae with slight peduncle or peduncle absent; 4 simple radial canals; no centripetal canals; folded ... [details]

Colony usually erect, monosiphonic or polysiphonic, branched or unbranched, arising from a creeping hydrorhiza, ... [details]

Medusa with four straight radial canals; four perradial marginal tentacles; marginal cirri; mouth simple, ... [details]

Eirenidae medusa with lateral cirri at the base of some or of all marginal tentacle bulbs; with excretory ... [details]

Hydroid colony stolonal, hydrotheca short, collar-shaped, on short pedicel; hydranth elongated, large, with ... [details]

Colony either with erect, branched or unbranched hydrocaulus, monosiphonic or polysiphonic or stolonal (Ophinella); ... [details]

Protiaridae medusae with gonad entirely surrounding manubrium; with gastric mesenteries; four radial canals; four ... [details]

Medusa with small manubrium; no gastric peduncle; four to eight, sometimes up to 12 radial canals; gonads completely ... [details]

Colonies mostly stolonal, with perisarc terminating at hydranth base; hydranth thick, clavate; tentacles filiform, in ... [details]

Hydroid colony forming massive, calcareous exoskeleton (= coenosteum) of varied shape; coenosteum with an internal ... [details]

Medusae 8 marginal bulbs; 24 moniliform tentacles, 2 per each marginal bulb and 8 adradial tentacles without ... [details]

Malagazziidae medusae with eight radial canals; eight gonads on radial canals; mouth with 8 lips. Polyp stage with ... [details]

Australomedusidae medusae with cruciform manubrium, 4 simple lips, no oral tentacles; 8 radial canals; 8 groups of ... [details]

Eirenidae medusae with short gastric peduncle; with marginal cirri; without excretory pores; gonads restricted to ... [details]

Colonies erect, monosiphonic or polysiphonic, arising from creeping, rootlike, or disc-shaped hydrorhiza; hydrocauli ... [details]

Rathkeidae medusae with eight simple radial canals; mouth arms divided once or dichotomously several times and ... [details]

Rhopalonematidae without gastric peduncle; gonads globular, on very distal parts of the 8 radial canals; only 8 ... [details]

Medusa with 4 or more main primary radial canals, some or all branching one or more times, primary canal and ... [details]

Hydroid colony stolonal; hydrotheca cylindrical, tapering distally, on a short pedicel; operculum pyramidal, formed ... [details]

Hydroid colony erect, arising from a creeping hydrorhiza, shoots unbranched or with stem and pinnately arranged ... [details]

Hydroid colony erect, branched or unbranched, mono- or polysiphonic; hydrocaulus bearing hydrocladia usually in ... [details]

Hydroid phase is not known. Medusa with four simple radial canals, tentacles hollow, manubrium with four simple ... [details]

Colony forming upright shoots or stolonal, arising from a creeping hydrorhiza, commonly monopodial, with terminal ... [details]

Campanulariidae forming stolonal or branched colonies; hydrotheca very deep and large, tulip-shaped, with flared ... [details]

Australomedusidae medusae with cruciform manubrium with 4 simple lips; 4 radial canals; 4 groups of marginal ... [details]

could belong to Protiaropsis according to Bouillon et al. (2006) [details]

could be a juvenile Protiaropsis anonyma according to Bouillon et al. (2006) [details]

Presumably congeneric with Halitiara [details]

Probably a synonym of Limnocnida indica [details]

probably a synonym of L. tanganyicae [details]

La Parguerra, Puerto Rico, depth 1-3 m.  [details]