Hydrozoan Research Laboratory, 405 Chemin Les Gatiers, 83170 Tourves, France..
Zootaxa. 2023 Mar 14;5254(4):451-475. doi: 10.11646/zootaxa.5254.4.1.
A new species of corymorphid, Corymorpha tropica sp. nov., of common occurrence in Southeast Asia, is described. The account is based on both its hydroid and newly-released medusa. The caulus of the former is conspicuously divided into two distinct parts: a proximal, perisarc-covered, papillate, light brown to orange-colored portion, and a distal, naked, non-papillate, flesh to brick red-colored portion. The hydranth is equally variously-colored, and has either a distinctly-demarcated or a more diffuse red, circular band around its base. A whorl of long blastostyles, situated slightly above the aboral whorl of tentacles, give rise to isolated clusters of gonophores borne on short, lateral pedicels. The dispersive stage is a free-living medusa that is released without gonads from the parent hydroid. At this stage, its umbrella is bell-shaped, with a moderately developed, rounded, apical projection and scattered nematocysts on the exumbrella, and has three atentaculate, conical bulbs, as well as a main tentacle provided with a distal, large, globular nematocyst cluster and up to two intermediate knobs on its adaxial side, the position of the latter clusters being diagnostic.
描述了一种常见于东南亚的新的 corymorphid 物种，即 Corymorpha tropica sp. nov.。该描述基于其水螅体和新释放的水母体。前者的水螅体明显分为两个不同的部分：近端，具被囊覆盖，具乳突，浅棕色到橙色部分，和远端，裸露，无乳突，肉色到砖红色部分。水螅体的颜色同样多种多样，在其基部周围有一个明显分隔或更弥散的红色圆形带。一束长的芽生体位于口面轮的上方，产生短的侧花梗上的独立的生殖巢簇。分散阶段是一个自由生活的水母体，从母体水螅体中释放出来时没有生殖腺。在这个阶段，它的伞是钟形的，有一个适度发达的圆形顶突和在伞缘上散布的刺细胞，并有三个具刺的、锥形的球茎，以及一个主触手，其末端有一个大的球形刺细胞簇，在其腹侧有多达两个中间节结，后者的位置是诊断性的。
