Pachygrapsus striatus A. Milne-Edwards, 1873

Ng, Ngan Kee, Rodríguez Moreno, Paula A., Naruse, Tohru, Guinot, Danièle & Mollaret, Noémy, 2019, Annotated type-catalogue of Brachyura (Crustacea, Decapoda) of the Muséum national d’Histoire naturelle, Paris. Part II. Gecarcinidae and Grapsidae (Thoracotremata, Grapsoidea), with an Appendix of pre- 1900 collectors, Zoosystema 41 (7), pp. 91-130 : 118

Pachygrapsus striatus A. Milne-Edwards, 1873

( Fig. 7G )

Pachygrapsus striatus A. Milne-Edwards, 1873b: 82 [6].

CURRENT TAXONOMIC STATUS. — Junior subjective synonym of Pachygrapsus plicatus (H. Milne Edwards, 1837) (see Kingsley 1880: 200), see above under Grapsus plicatus .

LECTOTYPE (by present designation). — MNHN-IU-2000-3586 (= MNHN-B3586 ), ♂ 13.5 × 16.0 mm, Sandwich Islands [Hawaiian Is.], coll. M. Ballieu. — Original label: “ Pachygrapsus striatus A. M. Edw., M. Ballieu , îles Sandwich; P. striatus = Grapsus striatus Edw. ”.

PRESERVATION OF THE LECTOTYPE. — Dry.

PARALECTOTYPES. — MNHN-IU-2000-1110 (= MNHN-B3586), 1 ♂ 12.1 × 15.1 mm and 1 ♂ with carapace cl 12.3 mm, same data as lectotype. MNHN-IU-2000-3583 (= MNHN-3583), 1 ♀ female 13.5 × 10.4 mm, Upolu — Other label: “ Pachygrapsus plicatus A. M. Edwards, Upolu ( Samoa) , 73-70” .

PRESERVATION OF THE PARALECTOTYPES. — MNHN-IU-2000-1110 (= MNHN-B3586), both dry, the larger one with damaged carapace, LP1, RP5 detached. MNHN-IU-2000-3583 (= MNHN-3583), dry, RP2 missing, LP1 detached.

REMARKS

In a paper dealing with the crabs from the Museum of M. C. Godeffroy, a private museum in Hamburg, Germany, which existed from 1861 to 1885 (see Appendix at Godeffroy Museum), A. Milne-Edwards (1873b) described as Pachygrapsus striatus material collected in the Sandwich Islands and in Samoa at Upolu: he quotes the number 5806 and cites a specimen measuring 14.0 × 11.0 mm. The species was synonymised to P. plicatus by Kingsley (1880), Ortmann (1894) and Tesch (1918: 77). This synonymy was recognised by Poupin et al. (2005: 38, 42) but not mentioned by Castro (2011: 114) in his Catalogue of Brachyura from the Hawaiian Islands.

The original sample MNHN-B3586, with three males, from Sandwich Islands, collected by M. Ballieu (poorly handwritten on the label, thus erroneously cited as “Baillien” by Poupin 2005: 38) (see Appendix) presumably belongs to the type series, as stated by Poupin et al. (2005: 42).

Even though the original sample MNHN-B3583 is labelled as P. plicatus , in the CAA entry data 73-70 (thus corresponding to 1870), it is registered as P. striatus . Thus it could have been examined by A. Milne Edwards and belong to the type series.

Ortmann (1894: 708, see footnote n°3) recorded a male and a female of P. plicatus from Upolu, as “ Mus. Godeffroy (vend.)” and with a footnote that mentions the same number 5806 [“Vend.” could indicated that the material was sold by the Godeffroy trading company]. Thus the P. plicatus of Ortmann (1894) could correspond to the P. striatus material of A. Milne Edwards (1873b).

The MZS handles one sample (MZS Cru 0742) labelled as “ Pachygrapsus plicatus Upolu, Godeffroy Mus., 1888 ”, with one male (with all pereiopods detached) and one female (with LP1-P5, RP1, RP4-5 detached) in the alcool collection (M.-D. Wandhammer, Chief Curator of MZS, personal communication, September 2017). Although there is no mention on the label of the number 5806 quoted by A. Milne-Edwards (1873b) and Ortmann (1894), this sample could belong to the type series, and the two specimens can be considered paralectotypes.

Poupin (2005: 39) recorded a dry sample of P. plicatus A. M. Edwards, Upolu, God. 88 (MZS Cru 1210), but this catalogue number deals with Orithyia sinica (Linnaeus, 1771) in the catalogue of the Strasbourg Museum (M.-D. Wandhammer, pers. comm., December 2017).

Figures

FIG. 7. – A, Metopograpsus gracilis Saussure,1858,MNHN-IU-2000-10991 (= MNHN-B10991),paralectotype,♀; B, Metopograpsus intermedius H. Milne Edwards, 1853, MNHN-IU-2014-11210 (= MNHN-B12888), lectotype, ♂; C, Metopograpsus maculatus H. Milne Edwards, 1853, MNHN-IU-2000-3554 (= MNHN-B3554), lectotype,♂; D, Metopograpsus miniatus Saussure,1858,MNHN-IU-2000-10994 (= MNHN-B10994),paralectotype,♂; E, Metopograpsus pictus A. Milne-Edwards, 1867, MNHN-IU-2000-3573 (= MNHN-B3573), paralectotype, ♂; F, Pachygrapsus minutus A. Milne-Edwards, 1873, MNHN-IU-2000-3582 (= MNHN-B3582), lectotype, ♂, & MNHN-IU-2000-1107 (= MNHN- B3582), paralectotypes, 4♂; G, Pachygrapsus striatus A. Milne-Edwards, 1873, MNHN-IU-2000-3586 (= MNHN- B3586), lectotype,♂; H, Grapsus varius Latreille,1803,MNHN-IU-2000-3526 (= MNHN-B3526),neotype,♂. Scale bars:A,5 mm;B, D, F, G, 10 mm; C,E, H, 2 cm.