Maja Lamarck, 1801

Ng, Peter K. L. & Forges, Bertrand Richer De, 2015, Revision of the spider crab genus Maja Lamarck, 1801 (Crustacea: Brachyura: Majoidea: Majidae), with descriptions of seven new genera and 17 new species from the Atlantic and Indo-West Pacific, Raffles Bulletin of Zoology 63, pp. 110-225 : 119

publication ID	https://doi.org/ 10.5281/zenodo.5384590
publication LSID	lsid:zoobank.org:pub:40BCDD62-D35E-46D1-95A3-2CC0DF219DEE
DOI	https://doi.org/10.5281/zenodo.5466787
persistent identifier	https://treatment.plazi.org/id/03A9654B-FF88-0751-57A5-FD4B7A67FA6E
treatment provided by	Valdenar
scientific name	Maja Lamarck, 1801
status	s. str.

Treatment

Key to species of Maja Lamarck, 1801 View in CoL , s. str.

1. Supraorbital eave relatively broad, as wide as long; dorsoanterior surface of carapace with 2 unarmed, relatively smooth dark oval window-like patches, one on each side of gastric region ( Figs. 6A, B View Fig , 36E View Fig ); ischium of third maxilliped ca. 1.5 times as long as wide ( Fig. 43F View Fig ); Mediterranean and adjacent Atlantic waters............................... Maja crispata Risso, 1827 View in CoL

– Supraorbital eave relatively narrow, longer than wide; dorsoanterior surface of carapace evenly granulated, without any unarmed or ovate patches ( Figs. 4 View Fig , 36A–D View Fig ); ischium of third maxilliped twice as long as wide ( Fig. 43A–E View Fig ); eastern Atlantic to western Indian Ocean .........................................................2

2. Carapace of adults longer than wide; adult pseudorostral spines subparallel; restricted to Mediterranean ( Fig. 36A View Fig )................. ................................................. Maja squinado (Herbst, 1788) View in CoL

– Carapace of adults rounded, as long as large; adult pseudorostral spines diverging, forming a V ( Fig. 36B–D View Fig ); Atlantic to South Africa.......................................................................................3

3. Spines of lateral carapace margin relatively short; antorbital spine almost straight ( Figs. 4C–F View Fig , 36B, C View Fig ); northern Atlantic to mid-Atlantic ...................... M. brachydactyla ( Balss, 1922) View in CoL

– Spines of lateral carapace margin relatively long; antorbital spine curved ( Figs. 5 View Fig , 36D View Fig ); southern Atlantic to South Africa....... .................................................... M. cornuta ( Linnaeus, 1758) View in CoL