Philocheras Stebbing 1900
Creators: name: Taylor, Joanne
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Crangonidae
Philocheras

description: Key to species of Philocheras Stebbing, 1900 known from Australia (modified from Komai 2008)   
1. Antennal scale with 1 tooth or serration on lateral margin........................................................................................... 2  
– Antennal scale unarmed on lateral margin................................................................................................................... 7  
2. Antennal scale with 1 tooth on lateral margin; rostrum with setae extending onto orbital margin.............................. 4  
– Antennal scale with serration on lateral margin; rostrum without setae....................................................................... 3  
 3. Carapace with median carina and pair of submedian and lateral carinae and 5 spines (1 median, 2 submedian, 3 lateral). ................................................................................................ P. japonicus [WA; Japan and Philippines to 42 m]   
 – Carapace with median carina and no spines................................................................................................................... .......................................................... P.lowisi [NT, WA; Andaman Islands, Japan, Hong Kong; sublittoral to 120 m]   
 4. Rostrum triangular in dorsal view, terminating in acuminate tip; setae on rostrum and orbital margin short............... ................................................................................................................................................ P. triangulus [NT, 7.3 m]   
– Rostrum broad or narrow, but not triangular in dorsal view; setae on rostrum and orbital margin long...................... 5  
 5. Rostrum broad, terminating in deeply excavate convex tip with lateral horns; carapace without middorsal carina but with 3 middorsal spines; lateral spine on antennal scale positioned well below midpoint............................................. ...................................................................... P. incisus [WA; Gulf of Oman to Philippines; Japan; subtidal to 153 m]   
– Rostrum narrow, terminating in convex, concave or truncate tip, with or without lateral horns; carapace with middorsal carina, with or without middorsal spines; lateral spine on antennal scale positioned at midpoint.................... 6  
 6. Rostrum terminating in convex tip with small lateral horns; carapace with middorsal carina interrupted at midpoint, with 1 middorsal spine ...................................................... P. angustirostris [WA; Arabian Sea to Indonesia, 13–83 m]   
 – Rostrum terminating in slightly concave or truncate tip without lateral horns; carapace with continuous middorsal carina, without middorsal spine .................................................................................................... P. brucei [Qld, 11 m]   
7. Third and fourth abdominal somites with middorsal carina......................................................................................... 8  
– Third and fourth abdominal somites rounded dorsally................................................................................................. 9  
 8. Carapace with 3 middorsal teeth including epigastric tooth, middorsal ridge absent........................................................................................................................................................................................... P. victoriensis [Vic, sublittoral]   
 – Carapace with 1 middorsal tooth (epigastric tooth); middorsal ridge present as an indistinct discontinuous ridge extending from mid-dorsal tooth to posterior margin ................................................ P. anthonyi sp. nov. [WA, 222 m]   
9. Carapace with 1 or 2 middorsal teeth including epigastric tooth............................................................................... 10  
– Carapace with 3 middorsal teeth including epigastric tooth....................................................................................... 15  
 10. Carapace with longitudinal row of small teeth posterior to orbit............................................................................................................................................................................................. P. intermedius [Gulf of St Vincent, SA, sublittoral]   
– Carapace without longitudinal row of small teeth posterior to orbit.......................................................................... 11  
 11. Carapace with 2 middorsal teeth including epigastric tooth [rostrum broad with concave lateral margins, distal margin truncate in dorsal view]................................................................................................ P. obliquus [Vic, sublittoral]   
– Carapace with 1 middorsal tooth (epigastric tooth).................................................................................................... 12  
 12. Carapace with postorbital carina.................................................................. P. modestus [Indonesia; WA, 296–457 m]   
– Carapace without postorbital carina........................................................................................................................... 13  
 13. Rostrum broad with distal margin broadly truncate; carapace with 1 tooth posterior to branchiostegal tooth.............. ....................................................................................... P. planoculminus [Flat Top Bank, Timor Sea; WA, 30–49 m]   
– Rostrum medium to narrow with distal margin convex (rounded); carapace with 2 teeth posterior to branchiostegal tooth............................................................................................................................................................................ 14  
 14. Rostrum narrow; carapace with pair of carinae extending from below orbital margin to mid-dorsal point.................. ........................................................................................................................................... P. flindersi [Vic, sublittoral]   
 – Rostrum medium; carapace smooth, without dorsal carinae.......................................................................................................................................................................................... P.plebs [WA; Port Blair, Andaman Islands, 3.6–101 m]   
 15. Carapace with 2 teeth posterior to antennal tooth.... P. pilosus [NT; Indian Ocean, New Caledonia; shallow subtidal]   
 – Carapace with longitudinal row of 5 teeth posterior to antennal tooth......................... P. poorei [Albany, WA, littoral]
description: Published as part of Taylor, Joanne, 2010, The sand shrimp genus Philocheras (Caridea: Crangonidae) from the continental margin of Western Australia including the description of a new species and a key to Australian species *, pp. 157-168 in Zootaxa 2372 (1) on pages 158-159, DOI: 10.11646/zootaxa.2372.1.16, http://zenodo.org/record/5305091