Phylladiorhynchus ikedai ( Miyake & Baba, 1965 )

Rodríguez-Flores, Paula C., Macpherson, Enrique & Machordom, Annie, 2021, Revision of the squat lobsters of the genus Phylladiorhynchus Baba, 1969 (Crustacea, Decapoda, Galatheidae) with the description of 41 new species, Zootaxa 5008 (1), pp. 1-159 : 51

Phylladiorhynchus ikedai ( Miyake & Baba, 1965)

Galathea ikedai Miyake & Baba, 1965: 588 , figs 3, 4 (near Muko-jima, Bonin Islands).

Phylladiorhynchus ikedai .— Baba, 1969: 5 (reexamination of type material).— Baba et al., 2008: 175 (compilation).

Not Phylladiorhynchus ikedai . — Baba, 1991: 485, figs 4a–b (= P. argus n. sp., P. butes n. sp., P. eneus n.sp., P. maestratii n. sp.).

Records requiring verification:

Phylladiorhynchus ikedai .— Baba, 1977: 252 ( Maldives).— Baba, 2005: 200, 304 (Kei Islands, 245–300 m, Japan, Fukuoka, 110 m).— Dong & Li, 2013 a: 1317, fig. 2 (South China Sea, 168 m).

Diagnosis. Rostrum triangular, subapical spines absent or, if present, obsolescent, lateral margins straight. Carapace with epigastric ridge armed with 5 spines; anterior branchial margin with 3 spines; anterior protogastric ridge not interrupted medially, without scale behind median epigastric spine; anterior mesogastric and metagastric ridges not medially interrupted. Pleonal tergite 3 without posterior transverse ridge. Anterior margin of thoracic sternite 3 moderately convex sometimes with feeble median excavation Antennule article 1 with 4 distal spines (double distolateral spine absent). Antennal article 2 with distolateral spine longer than distomesial; article 3 with distinct distomesial spine. Flexor margin of Mxp3 merus with 2 prominent spines. P2–4 dactylus extensor margin without upright spines at bases of movable spines.

Distribution. Only known from the type locality, Bonin Islands, Japan.

Remarks. Pending the verification of some previous records, P. ikedai is only known from the male holotype. The species is characterized by the presence of 5 epigastric spines, 1 hepatic spine, 3 anterior branchial spines, the anterior metagastric ridge not medially interrupted and the antennular article 1 with 4 spines only. The existence of some closely related species, e.g. P. argus , P. butes , P. eneus , etc., suggests that some occurrences of P. ikedai remain to be confirmed. Unfortunately, we have not studied the specimens from Maldives ( Baba 1977), Japan (Fukuoka) ( Baba 2005) and South China Sea ( Dong & Li 2013), recommending further revision to confirm their identity.