Grapsus maurus Lucas, 1846

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 : 106

Grapsus maurus Lucas, 1846

( Fig. 4C )

Grapsus maurus Lucas, 1846 ( 1846 -1849): 20, pl. 2, fig. 5 (see Evenhuis 2012: 38).

Leptograpsus maurus – H. Milne Edwards 1853: 173 ( Algeria).

CURRENT TAXONOMIC STATUS. — Pachygrapsus maurus ( Lucas, 1846) , accepted recombination (see Heller 1863: 112).

LECTOTYPE (by present designation). — MNHN-IU-2000-3523 (= MNHN-B3523 ), ♂ 17.0 × 19.5 mm, Oran, northwestern coast of Algeria, M. Deshayes, M. Lucas. — Original label: “ Leptograpsus maurus Edw. , Oran, M. Lucas ”.

PRESERVATION. — Dry. Specimen attached onto cardboard by a stub; RP5 missing.

REMARKS

The species described by Lucas (1846: 20) was based on two male specimens, one measuring 17.0 × 19.5 mm, collected by Deshayes at Oran, located on the northwestern coast of Algeria. Lucas (1846) noted: “This species, of which I have only two male individuals, was found during the summer, in Oran harbour, by M. Deshayes” (“ Cette espèce, dont je ne possède que deux individus mâles, a été rencontrée pendant l’été, dans la rade d’Oran, par M. Deshayes ”). Rathbun (1918: 244) indicated that the ‘type’ was in the “ Paris Museum”, but Poupin et al. (2005: 28) noted that “the first author was unable to locate it” in the MNHN. A sample MNHN-IU-2000-3523 (= MNHN-B3523), with only one male specimen labelled “ Oran, M. Lucas”, thus from the type locality and obviously collected and identified by Lucas, fully corresponds to the male specimen described and measured by Lucas (1846). It is hereby designated as lectotype. The second specimen of the type series is missing.

Figures

FIG. 4. — A, Grapsus lividus H. Milne Edwards, 1837, MNHN-IU-2000-3426 (= MNHN-B3426), lectotype, ♂; B, Grapsus maculatus H. Milne Edwards, 1853, MNHN-IU-2000-3414 (= MNHN-B3414), lectotype, ♂; C, Grapsus maurus Lucas, 1846, MNHN-IU-2000-3523 (= MNHN-B3523), lectotype, ♂; D, Grapsus oceanicus H. Jacquinot in Hombron & H. Jacquinot 1846, MNHN-IU-2000-10992 (= MNHN-B10992), lectotype, ♂, & MNHN-IU-2000-1104 (= MNHN-B10992), paralectotype, ♂; E, Grapsus ornatus H. Milne Edwards, 1853, MNHN-IU-2000-3415 (= MNHN-B3415), lectotype, ♂; F, Grapsus pelagicus H. Milne Edwards, 1853, MNHN-IU-2000-3450 (= MNHN-B3450), holotype, ♀. Scale bars: A, C, 10 mm; B, D, F, 2 cm; E, 5 cm.