Trachysalambria

Chan, Tin-Yam, Cleva, Régis & Chu, Ka Hou, 2016, On the genus Trachysalambria Burkenroad, 1934 (Crustacea, Decapoda, Penaeidae), with descriptions of three new species, Zootaxa 4150 (3), pp. 201-254 : 206

Key to species of Trachysalambria :

1. Epipods present on anterior 3 pereiopods................................................................. 3

- Epipod absent on pereiopod I........................................................................... 2

2. Epipod only present on pereiopod III. Dorsal carinae on abdominal somites IV and V terminating posteriorly into spine. Petasma with lateral margins of stem parallel. Thelycum with anterior plate regularly convex................ T. malaiana

- Epipods present on anterior pereiopods II and III. Dorsal carinae on abdominal somites IV and V not ending in spines. Petasma with lateral margins of stem converging distally. Thelycum with anterior plate semi-triangular................ T. longipes

3. No dorsal carina on abdominal somites II and III. Carapace nearly naked. Distolateral lobes of petasma with tips bifurcate. Posterior plate of thelycum without median cleft................................................ T. brevisuturae

- Dorsal carinae present on abdominal somites II and III (that on somite II may be rudimentary). Carapace pubescent. Distolat- eral lobes of petasma with tips pointed. Posterior plate of thelycum with median cleft.............................. 4

4. Dorsal carinae of abdominal somites IV and V terminating in spines............................................ 5

- Dorsal carinae of abdominal somites IV and V not ending in spines............................................ 6

5. Abdominal somite II with 2 dorsal carinae. Dorsal carina distinct along entire abdominal somite III..... T. dentata sp. nov.

- Abdominal somite II with 1 dorsal carina. Distinct dorsal carina only present at posterior 2/3 of abdominal somite III.......................................................................................... T. parvispina sp. nov.

6. Abdominal somite III with dorsal carina distinct along entire somite. Females with coxa of pereiopod IV medially expanded as long setose plate. Large females with anterior plate of thelycum as pair of large ball-like swellings...... T. crosnieri sp. nov.

- Abdominal somite III generally with dorsal carina distinct only at posterior 2/3 of somite. Females with coxa of pereiopod IV not particularly expanded medially, anterior plate of thelycum generally flat or depressed........................... 7

7. Dorsal carinae of telson sharp. Anterior plate of thelycum shaped like inverted heart and with lateral margins rounded in large females................................................................................ T. palaestinensis

- Dorsal carinae of telson blunt. Thelycum with anterior plate semi-triangular...................................... 8

8. Dorsal carinae on abdomen high, that of tergite II often as elevated plate........................................ 9

- Dorsal carinae on abdomen low, that of tergite II more or less leveled.......................................... 10

9. Rostrum S-shaped in females, with tip strongly recurved downwards and hook-like. Rostrum of males with tip also more or less recurved downwards, rostral teeth never forming a crest............................................ T. nansei

- Rostrum not S-shaped in females, sometimes even straight, tip at most only slightly recurved downwards. Rostrum of males with tip not recurved downwards, rostral teeth sometimes crest like...................................... T. aspera

10. Postrostral carina extending to posterior margin of carapace........................................ T. curvirostris

- Postrostral carina terminating shortly behind epigastric tooth................................................. 11

11. Tip of rostrum not recurved downwards. Telson with dorsal carinae weakly ridged. Abdomen relatively less pubescent and sometimes nearly naked, dorsal carina on somite II often indistinct..................................... T. albicoma

- Tip of rostrum recurved downwards. Telson with dorsal carinae heavily ridged. Abdomen pubescent, dorsal carina on somite II low but obvious......................................................................... T. starobogatovi