Review of grapsoid families for the establishment of a new family for Leptograpsodes Montgomery, 1931, and a new genus of Gecarcinidae H. Milne Edwards, 1837 (Crustacea, Decapoda, Brachyura, Grapsoidea MacLeay, 1838) Author Guinot, Danièle Institut de Systématique, Évolution, Biodiversité (ISYEB), Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, case postale 53, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) guinot @ mnhn. fr (corresponding author) guinot@mnhn.fr Author Ng, Ngan Kee Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543 (Republic of Singapore) dbsngnk @ nus. edu. sg dbsngnk@nus.edu.sg Author Rodríguez Moreno, Paula A. Direction générale déléguée aux Collections, Muséum national d’Histoire naturelle, case postale 30, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) martin-lefevre @ mnhn. fr Dedicated to the memory of Michael Türkay (1948 - 2015) lefevre@mnhn.fr text Zoosystema 2018 2018-12-21 40 26 547 604 journal article 9255 10.5252/zoosystema2018v40a26 2697b081-f3fa-4256-a62d-f084ee352b1c 1638-9387 4336858 urn:lsid:zoobank.org:pub:E018714D-7CCF-4AB8-A88A-EF033530CA75 KEY TO GENERA CARDISOMA LATREILLE, 1828 , DISCOPLAX A. MILNE- EDWARDS, 1867 AND TUERKAYANA N. GEN. 1. Orbit with a large lateral gap closed by an obliquous margin; suborbital ridge, forming a pars stridens; plectrum on the inner margin of cheliped merus. Subhepatic, subbranchial and posterolateral regions heavily striated. Median line on sternites 8 and 7 ............................................................ Discoplax A. Milne-Edwards, 1867 — Orbit closed laterally by right-angled margin; no suborbital ridge, no stridulatory apparatus. Subhepatic and subbranchial areas without striae. Posterolateral striae either absent or faint and lost at largest size .............. 2 2. Proepistome prominently dome-shaped. No posterolateral striae; anterolateral margin not delimited, unarmed. Sternite 4 wide and short. Pleonal somite 6 narrow and conspicuously elongated; telson elongated. Median line on sternites 8, 7 and 6 ............................................................................................ Cardisoma Latreille, 1828 — Proepistome dome-shaped wide but low. Weak but distinct posterolateral striae, may disappear in largest adults. Sternite 4 wide and short. Pleonal somite 6 broad and short; telson short, bluntly tipped. Median line on sternites 8 and 7 .................................................................................................................... Tuerkayana n. gen.