Platythelphusa A. Milne-Edwards 1887
Creators: name: Reed, Sadie K.
name: Cumberlidge, Neil
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Potamonautidae
Platythelphusa

description: Key to the species of Platythelphusa   
 1 Anterior margin of front deflexed, lacking well­defined teeth on external corners..... 2   
 ­ Anterior margin of front almost horizontal, with well­defined sharp teeth on external corners........................................................................................................................ 3   
 2 External angles of front rounded, frontal margin granular. Small epibranchial tooth, one larger tooth on anterolateral margin in mesogastric region (Pl. XXIV)................................................................................................................................. P. praelongata   
­ External angles of front square­shaped......................................................................... 4  
 3 Frontal margin lined with tooth­like tubercles............................................................. 7   
 ­ Frontal margin lined by granules................................................................................ 8   
 4 Merus of p5 shorter than front width. One tooth on the anterolateral tooth behind the epibranchial tooth, equal in size to the epibranchial tooth (Pl. XXIII)............. P. polita   
 ­ Merus of p5 either longer than, or almost equal to, front width.................................. 5   
 5 Epibranchial lobes distinctly raised. Inferior margin of ischium of p1–p5 with distal spine (Pl. XXV)....................................................................................... P. tuberculata   
 ­ Epibranchial lobes indistinct. Distal spine on inferior margin of ischium of p1–p5 lacking........................................................................................................................ 6   
 6 Inferior margins of meri and propodi of p2–p4 each with a row of distinct spines (Pl. XX)...................................................................................................................... P. echinata   
 ­ Inferior margins of meri of p2–p4 granulate, inferior margins of propodus of p2 with several minute spines, inferior margins of propodus of p3–p4 smooth (Pl. XXII)............................................................................................................................. P. maculata   
 7 Distal tooth of meri of p2–p4 pointed spine (Pl. XVIII).......................... P. conculcata   
 ­ Distal tooth of meri of p2–p4 either low or lacking..................................................... 8   
 8 Subdistal tooth of meri of p2–p4 either low or lacking (Pl. XVII)................ P.armata   
 ­ Subdistal tooth of meri of p2–p4 a sharp spine............................................................ 9   
 9 Carapace flattened (ch/fw <1.0) (Pl. XXI).............................................. P. immaculata   
 ­ Carapace high (ch/fw>1.0) (Pl. XVII).................................................... P. denticulata
description: Published as part of Reed, Sadie K. & Cumberlidge, Neil, 2006, Brachyura: Potamoidea: Potamonautidae, Platythelphusidae, Deckeniidae (), pp. 1-139 in Zootaxa 1262 (1) on pages 1-139, DOI: 10.11646/zootaxa.1262.1.1, http://zenodo.org/record/5065350