Rostrum process; 1st pereopod with carpus entire, not


Rostrum
overreaching anteriorly extended eyes, compressed laterally, if armed dorsally,
teeth confined to anterior 1/2 of length, lateral carina not expanded into
broad supraocular or postocular eave; carapace not compressed laterally, dorsal
profile slightly convex, not dentate or lobate, anterior margin not partially
produced as prominent rounded

lobe,
not partially deeply concave (notched), without longitudinal ridge parallel
with ventral

We Will Write a Custom Essay Specifically
For You For Only $13.90/page!


order now

 

 

 

 

 

margin
or longitudinal branchiostegal suture, with or without antennal spine,
otherwise completely unarmed, orbital margin not interrupted posteriorly; abdomen
with pleuron of 5th somite rounded, not sharppointed; telson not curved
ventrad, posterior margin not deeply incised, median and submedian pairs of
posterior spines not curved ventrad, dorsolateral spines slender or minute, not
robust; epistome not bearing paired, horn-like processes; antennal scale well
developed, distolateral spine not reaching as far as level of distal margin of
blade; mandible without palp; 3rd  maxilliped with exopod; 4th thoracic sternite
without slender median process; 1st  pereopod with carpus entire, not subdivided; 2nd
 pereopods similar but not necessarily
equal, chela much longer than carpus, not borne in vertical plane,

movable
finger not ventrad, fingers not provided with socket and plunger closure,
movable finger normal, not semicircular, palm more than 1 1/2nd  times as
long as high; 3rd pereopod composed of 7 segments, merus and ischium not fused,
dactyl sometimes with flexor margin dentate, often with extensor surface
densely microspinulate, sometimes biunguiculate, but never with massive
hoof-shaped or triangular protuberance, merus unarmed on flexor margin; uropod
with lateral branch bearing single movable lateral spine without distinct fixed
tooth; living in mantle cavity of bivalve molluscs.

Rostrum apically rounded, bearing 4-6 minute and
obscure teeth on dorsal and anterior margins, unarmed ventrally; carapace with
distinct antennal spine below ventral orbital angle; 3rd  maxilliped with antepenultimate segment about
twice as wide as penultimate segment; 1st  pereopod with chela normal, not cannulate; 3rd
 pereopod with dactyl simple, not
biunguiculate; maximum postorbital carapace length about 9 mm.

x

Hi!
I'm William!

Would you like to get a custom essay? How about receiving a customized one?

Check it out