On two species of Hydractinia living in symbiosis with a hermit crab

Abstract

TWENTY-THREE FIQURES 36. Podocoryne sp.? (Figs. 103, 104, 105.) Trophosonre.-The chitin of the hydrorhiza is very strong and bears at places chitinous spines with branches. Hydranths large, growing out in numbers from a hydrorhizal substratum; there are two forms of hydranths, one large, the larger ones 5 mm. high and 1 nim. across, with about 30 filiform tentacles arranged in a single row 3 Stimpson: '58, p. 225. 4 Inaba: '92, p. 96. A small island off the town of hlkaki. LOC. cit. : '09, p. 24,

Hydroidpolypen der Japanischen Ostküste. ... II. Teil: Campanularidae, Halecidae, Lafoeidae, Campanulinidae und Sertularidae, nebst ergänzungen zu den Athecata und Plumularidae

“…Die eine Schneckenschale bewohnt von Eupagurus gracilipes (Stimpson), die zweite von Pagurus striatus Latreille. Die auch von mir noch nicht gefundenen Gonophoren sind inzwischen von Goto (1910) entdeckt und untersucht worden. Es sind Sporosacs, die direkt an der Hydrorhiza entspringen.…”

First record of two species of hermit crabs (Decapoda, Paguridae) from South Korea, with remarks on the associated hydrozoan, Hydrissa sodalis

“…In the case of P. constans, its gastropod shell is small and fully covered by H. sodalis, as indicated in the previous study (Goto, 1910;Makarov, 1962), although there is a specimen living in the sponge (Komai, 1999). In D. impressus and P. simulans, 8 out of 13 (61.5%) and 80 out of 139 specimens (57.6%) are associated with H. sodalis, respectively.…”

“…Until now, H. sodalis has been known to be associated with P. constans (Stimpson, 1858; Goto, 1910;Williams & McDermott, 2004). However, the presence of H. sodalis in P. rectidactylus suggests that H. sodalis might have multiple hosts, like Hydractinia echinata (Fleming, 1828) does (Williams & McDermott, 2004).…”