Paranamixis, Schellenberg, 1938

Kaim-Malka, R. A., 2024, A new species of the family Leucothoidae (Crustacea, Amphipoda) from the Mediterranean Sea, Paranamixis fishelsoni sp. nov., Zootaxa 5463 (3), pp. 441-450 : 448-449

Key to the anamorph male of Paranamixis species known

1) Coxa 2 rectangular shaped.............................................................................. 4

- Coxa 2 not rectangular shaped.......................................................................... 2

2) Coxa 2 trapezoid shaped.............................................................................. 11

- Coxa 2 not trapezoid shaped............................................................................. 3

3) Coxa 2 round shaped................................................................................. 13

- Coxa 2 oval shaped.................................................................................. 16

4) Coxa 2 longer than broad.............................................................................. 5

- Coxa 2 broader than long, anterodistal margin with sharp process............................................... 9

5) Coxa 2 distal margin round, without sharp process; Head triangular............................ P. kanu Thomas 1997

- Coxa 2 distal margin not round, with sharp process........................................................... 6

6) Coxa 2 sharp process on the ventral margin................................................................ 7

- Coxa 2 sharp process on the anterior margin............................................................... 8

7) Gn2: propodus apex with a single sharp process; dactyl tuberculate on the inner margin.......... P. clarkae Thomas 1997

- Gn2: propodus palm with one large and several small triangular protrusions; dactylus: proximal margin with excavation.............................................................................. P. lunata White & Machida 2018

8) Coxa 2 anterior margin with a subdistal sharp process (inferior third of the margin length)............................................................................................ P. sommelieri White & Krapp-Schickel 2017

- Coxa 2 anterior magin with a midlength sharp process..................................... P. fijiensis Thomas 1997

9) Gn.2 basis not serrate, dactylus not excavated; Pereiopod 5 basis posterior margin smooth.. P. ledoyeri Ortiz & Lalana 1997

- Gn.2 basis serrate.................................................................................... 10

10) Gn.2 dactylus excavated; Pereiopod 5 basis posterior margin with a notch.................... P. excavatus Ledoyer 1978

- Gn.2 dactylus not excavated; Pereiopod 5 basis trapezoidal shaped......................... P. bocki Schellenberg 1938

11) Coxa 2 without cusp, projection or notch; Gn.2 basis with an anterior triangular process and a posterior excavation, propodus posteriorly excavate with 3 teeth...................................................... P. aberro Hirayama 1983

- Coxa 2 distal margin with projection or notch............................................................. 12

12) Anterior head margin oblique, with mid-lateral notch; Gn.2 basis with serrate distomedial ridge, propodus serrate, dactylus inner margin tuberculate; carpus 0.5 x propodus length................................. P. misakiensis Thomas 1997

- Anterior head margin truncate, with one acute tooth; Gn.2 articles not serrate, carpus 0.8 x propodus length; propodus with distal process.............................................................. P. jiigurru White & Thomas 2009

13) Coxa 2 margin smooth................................................................................ 14

- Coxa 2 margin not smooth............................................................................. 15

14) Coxa 2 round; Gn.2 basis with a distal knob, propodus distal palm dentate, dactylus inner margin denticulated; anterior head margin with notch............................................................. P. denticulus Kim & Kim 1991

- Coxa 2 rougthly round; Gn.2 basis with denticulate ridge, propodus distal palm dentate, dactylus excavated proximally; anterior head margin with a small cup................................................ P. madagascariensis Ledoyer 1982

15) Coxa 2 anterior margin with 2 small notches; Gn.2 propodus palm with strong distal tooth and a narrow posterior sinus, inner margin of dactylus dentate....................................................... P. indicus Sivaprakasam 1968

- Coxa 2 anterior margin with 1 small notch; Gn.2 basis with anterodistal serrate ridge, propodus palm with several tubercules, proximal margin dactylus with 2 plumose setae................................... P. thomasi White & Reimer 2012

16) Coxa 2 longer than broad; Gn.2 carpus 0.79 x propodus length, propodus distal palm denticulate, dactylus with one tooth................................................................................ P. dentidactylus Myers 2013

- Coxa 2 broader than long; Gn.2 carpus 0.67 x propodus length, propodus distal palm not denticulate, with a little distal triangular protrusion, dactylus smooth excavate with 2 setae at the distal third of the length.................. P. fishelsoni sp. nov.