Phylladiorhynchus cf. pusillus ( Henderson, 1885 )

Ahyong, Shane T., 2007, Decapod Crustacea collected by the NORFANZ Expedition: Galatheidae and Polychelidae, Zootaxa 1593, pp. 1-54 : 42

publication ID	https://doi.org/10.5281/zenodo.178624
DOI	https://doi.org/10.5281/zenodo.5030667
persistent identifier	https://treatment.plazi.org/id/0395878E-FFAC-6A7A-FF47-FC00FBA457ED
treatment provided by	Plazi (2016-04-06 00:11:51, last updated 2024-11-28 23:16:20)
scientific name	Phylladiorhynchus cf. pusillus ( Henderson, 1885 )
status

Treatment

Phylladiorhynchus cf. pusillus ( Henderson, 1885) View in CoL

( Fig. 20 View FIGURE 20. A B, 22)

Galathea pusilla Henderson, 1885: 407 View in CoL [type locality: off New South Wales, Australia]; 1888: 121, pl. 12: figs. 1, 1a, b. Galathea integra Benedict, 1902: 248 View in CoL [type locality: off Honshu, Japan].

Galathea lenzi Rathbun, 1907: 49 View in CoL , pl. 3: fig 1 [type locality: Corral, Chile].

Phylladiorhynchus pusillus View in CoL .— Haig, 1973: 282.— Baba 1974: 381; 1991: 486–487, fig. 4e, f; 2005: 305 [synonymy].

Material examined. Norfolk Ridge: NIWA 28065, 1 female (8.7 mm), southern Norfolk Ridge, 33°23.41’S, 170°11.58’E, 469–526 m, TAN0308/126 #87, 31 May 2003.

Southeastern Australia: AM P17563, 2 males (4.9–5.5 mm), 1 female (4.7 mm), S and SW of Mount Cann, Gippsland, Victoria, Australia, 120–183 m; AM E6158, 1 male (6.9 mm), S of Cape Everard, Victoria, Australia, with rhizocephalan.

Colour in life. Carapace and abdomen transparent, pale yellow-orange; with orange-red marginal spines and rostrum. Chelipeds clear, diffuse pink-red; spines orange-red. Fingers crossed by white band. Walking legs with diffuse, clear orange-red banding.

Remarks. The single NORFANZ specimen agrees with several ‘large’ Australian and New Zealand specimens reported as P. pusillus by Haig (1973) and Baba (1991), respectively, in their straight or almost straight rather than distinctly convex rostral margins. Phylladiorhynchus pusillus sensu stricto bears convex rostral margins ( Baba 1991) and generally does not exceed about 5 mm carapace length. The rostral condition of these ‘aberrant’ specimens appears not to be an allometric artefact, being stable across a wide size range ( Fig. 22 View FIGURE 22 ). As presently understood, P. p u s i l l u s could be a composite taxon, so present specimens are only tentatively identified pending a review of Phylladiorhynchus by K. Schnabel (NIWA).

Distribution. Western Indian Ocean to eastern Australia, New Zealand, the Chesterfield Islands, to Japan, San Félix, and the Juan Fernández Islands; intertidal to 580 m ( Baba 2005).

References

Baba, K. (1974) Four new species of galatheidean Crustacea from New Zealand waters. Journal of the Royal Society of New Zealand, 4 (4), 381 - 393.

Baba, K. (1991) Crustacea Decapoda: Alainius new genus, Leiogalathea Baba, 1969, and Phylladiorhynchus Baba, 1969 (Galatheidae) from New Caledonia. In: Crosnier, A. (ed.), Resultats de Campagnes MUSORSTOM, volume 9. Memoires de Museum national d'Histoire naturelle, 152: 479 - 491.

Baba, K. (2005) Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo-Pacific, with a list of species. Galathea Report, 20, 1 - 317.

Benedict, J. E. (1902) Descriptions of a new genus and forty-six new species of crustaceans of the family Galatheidae, with a list of the known marine species. Proceedings of the United States National Museum, 26, 243 - 334.

Haig, J. (1973) Galatheidea (Crustacea, Decapoda, Anomura) collected by the F. I. S. Endeavour. Records of the Australian Museum, 28 (14), 269 - 289.

Henderson, J. R. (1885) Diagnoses of the new species of Galatheidea collected during the Challenger Expedition. Annals and Magazine of Natural History, series 5, 16, 407 - 421.

Rathbun, M. J. (1907) South American Crustacea. Revista Chilena de Historia Natural, 11, 45 - 50, pls. 2, 3.

Figures

FIGURE 22. Phylladiorhynchus cf pusillus (Henderson, 1885). A – J, female, 8.7 mm, TAN 0308 / 126 (NIWA 28065). K – M, female 4.7 mm, male 4.9 mm, male 5.5 mm, off Victoria, Australia (AM P 17563). N, male 6.9 mm, off Victoria, Australia (AM E 6158). A, dorsal. B, left antennule, ventral view. C, left antenna, ventral view. D, right third maxilliped, lateral view. E, third and fourth sternites. F, telson. G, right cheliped, lateral view. H – J, right pereopods 2 – 4. Scale: A, G – J = 1.0 mm; B – F = 0.5 mm; K – N = 0.7 mm.

FIGURE 20. A, Paramunida labis Macpherson, 1996, ovigerous female, 7.9 mm, TAN 0308 / 025 (NIWA 28075). B, Phylladiorhynchus cf. pusillus (Henderson, 1885), female, 8.7 mm, TAN 0308 / 126 (NIWA 28065).