Phylladiorhynchus nui Schnabel & Ahyong, 2019

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 : 95-96

Phylladiorhynchus nui Schnabel & Ahyong, 2019

( Fig. 33G )

Phylladiorhynchus pusillus . — Haig, 1973: 282 (S of Cape Everard (Victoria), S and SW of Mt Cann (Victoria), and off St. Helens Point , Tasmania, 110–183 m) .

Phylladiorhynchus cf. pusillus . — Ahyong, 2007: 42 , fig. 20B, 22.

Phylladiorhynchus sp. 1 .— Rowden et al., 2010: tab. 3.

Phylladiorhynchus nui Schnabel & Ahyong, 2019: 320 , figs. 3, 8, 9, 15B.

Material examined. New Zealand. Iceberg Seamount , Stn. TAN0905/119, 44.158 –44.162 °S, 174.555– 174.552°W, 487–616 m, 28 Jun 2009: 11 M 5.0–9.0 mm, 18 F 4.1–8.2 mm (MNHN-IU-2019-2595, ex NIWA 54729 ) .

Diagnosis (modified from Schnabel & Ahyong 2019). Rostrum lateral margins straight or very slightly convex (in small specimens); subapical spines present. Epigastric region typically with 4 spines, small specimens can have lateral pair much smaller (sometimes granular) than mesial pair; anterior branchial margin of carapace with 3 spines; anterior metagastric ridge continuous, not medially interrupted. Pleonal tergite 3 with anterior and posterior transverse ridge. Anterior margin of thoracic sternite 3 biconcave, with obtuse median projection.Antennular article 1 with 4 well-developed spines and minute second lateral spine: distomesial spine long; second (proximal) lateral spine minute. Antennal article 1 mesial process distally reaching at least to level of second lateral antennular spine; article 2 distolateral spine distinctly larger than minute distomesial spine (if present), article 3 distolateral spine minute or absent. Flexor margin of Mxp3 merus with one prominent spine only. P2–4 dactylus extensor margin without upright spines at bases of movable spines.

Genetic data. COI and 16S, Table 1.

Distribution. Southeastern Australia, Tasmania, New Zealand, between 46 and 1246 m (from Schnabel & Ahyong 2019).

Remarks. The species closely resembles P. australis Schnabel & Ahyong, 2019 , from New Zealand and Southern Australia, and P. integrus ( Benedict, 1902) from Japan to Chesterfield Islands (see the differences under the Remarks of P. integrus ).

Figures

FIGURE 33. Rostrum, dorsal view. A, Phylladiorhynchus laureae n. sp., paratype female 1.7 mm (MNHN-IU-2019-2635). B, P. lini n. sp., holotype female 2.2 mm. C, P. lynceus n. sp., holotype ovigerous female 2.0 mm (MNHN-IU-2019-2593). D, P. marina n. sp., male 1.5 mm (MNHN-IU-2019-2653). E, P. medea n. sp., paratype male 2.1 mm (MNHN-IU-2014-13795). F, P. nudus Macpherson, 2008, ovigerous female 2.4 mm (WAM C46587). G, P. nui Schnabel & Ahyong, 2019, male 6.5 mm (MNHN-IU-2019-2595). H, P. orpheus n. sp., paratype male 1.9 mm (UF33962). I, P. paula n. sp., paratype male 2.3 mm (MNHN-IU-2019-2699). J, P. penelos n. sp., paratype male 3.3 mm (UF1224). K, P. pepei n. sp., holotype male 3,2 mm (MNHN-IU-2016-486). L, P. phanus n. sp., paratype male 2.1 mm (MNHN-IU-2019-2687). Scale bars = 1 mm.