SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY • NUMBER 543 ...

22 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
20. Second pereopods similar but unequal; major 2nd pereopod with pubescence on
movable finger reaching nearly to tip *25. Af. lanceifrons
Second pereopods subequal; distal x h of movable finger naked
44. Af. sintangense
21. Major 2nd pereopod with chela less than 3 /4 as long as carpus 22
Major 2nd pereopod with chela nearly as long as to much longer than carpus
23
22. Rostrum with dorsal teeth subequally spaced, 4 ventral teeth; branchiostegal suture
not extending posteroventrally past hepatic spine; 2nd pereopod with fingers
shorter than palm; 3rd pereopod overreaching antennal scale by length of dactyl
and '/2 of propodus 33. Af. minutum
Rostrum with dorsal teeth unequally spaced, 6-9 ventral teeth; branchiostegal
suture extending posteroventrally past hepatic spine; 2nd pereopod with fingers
longer than palm; 3rd pereopod barely overreaching antennal scale
37. M. palaemonoides
23. Second pereopods dissimilar 24
Second pereopods similar (not necessarily equal) 31
24. Major 2nd pereopod with chela less than 2'/2 times as long as carpus 25
Major 2nd pereopod with chela more than 2'/2 times as long as carpus .... 30
25. Third pereopod with propodus bare except for groups of long setae and sometimes
slight pubescence or minute spinules 26
Third pereopod with propodus bearing numerous appressed scales or spines over
most of surface 28
26. Major 2nd pereopod with chela subcylindrical, little longer than carpus; minor 2nd
pereopod with palm partially furred *9. Af. australe
Major 2nd pereopod with chela somewhat compressed, more than 1 '/2 times as long
as carpus; minor 2nd pereopod without fur on palm 27
27. Major 2nd pereopod with carpus shorter than merus, fingers not gaping
*10. Af. bariense
Major 2nd pereopod with carpus longer than merus, fingers strongly bowed, gaping
*27. Af. latidactylus
28. Minor 2nd pereopod with fingers 1-272 times as long as palm; 3rd pereopod
overreaching antennal scale by length of dactyl and '/3-'/2 of propodus
*29. Af. lepidactyloides
Minor 2nd pereopod with fingers little if at all longer than palm; 3rd pereopod
overreaching antennal scale by little more than length of dactyl 29
29. Major 2nd pereopod with fingers seldom more than 2 /3 as long as palm, carpus
shorter than merus *39. Af. placidulum
Major 2nd pereopod with fingers about as long as palm or longer, carpus longer than
merus 40. Af. placidum
30. Two or 3 teeth of dorsal rostral series situated on carapace posterior to orbital
margin; major 2nd pereopod with fingers about 2 h as long as palm
12. Af. clymene
Six or 7 teeth of dorsal rostral series situated on carapace posterior to orbital margin;
major 2nd pereopod with fingers 1-1 3 A times as long as palm
36. Af. oenone
31. Major 2nd pereopod with palm somewhat compressed 32
Major 2nd pereopod with palm subcylindrical 35
32. Major 2nd pereopod with chela nearly or quite 3 times as long as carpus ... 33
Major 2nd pereopod with chela about twice as long as carpus 34
33. Three or 4 teeth of dorsal rostral series situated on carapace posterior to orbital
margin; 3rd pereopod with propodus bare except for groups of long setae and
sometimes slight pubescence or minute spinules; maximum carapace length less
than 10 mm II. A#. callirrhoe