100 ASELLOTA • STENETRIIDAE 



Stenetrium Haswell, 1881 



DIAGNOSIS Eyes present. Cephalon broader than long. Rostrum short, 

 basally broad, anteriorly truncate or rounded. Pereonites 1-4 with ante- 

 rolateral projections; pereonites 5-7 projecting posteriorly. Pleotelson with 

 sharp tooth anterior to small lateral notch. 



REMARKS If fresh material is not available, and color pattern is lost in pres- 

 ervation, mature male material is needed as identification is based on the 

 structure of male pereopod 1 . 



Key to species of Stenetrium 



1. Eyes of few (not more than 10) ommatidia, not reniform 2 



Eyes of many ommatidia, reniform 3 



2. Eyes of four ommatidia; 6 pereopod 1 small, propodus not unusually 



"^^^^ minocule 



Eyes of more than four ommatidia; 6 pereopod 1 , propodus broad, 

 with wide palm patulipalma 



3. Pleotelsonic margins serrate 4 



Pleotelsonic margins entire 5 



4. Rostrum convex, with fine marginal teeth; pereopod 1 6 , propodal 



palm with three straight teeth bowmani 



Rostrum truncate; pereopod 1 c?, propodal palm with two teeth, outer 

 tooth elongate, curved serratum 



5. Pereopod 1 6, carpus produced, apically acute stebbingi 



Pereopod 1 6 , carpus produced, apically rounded spathulicarpus 



Stenetrium bowmani Kensley, 1984 

 Figure 45 



DIAGNOSIS 6 5.0 mm, 9 5.2 mm. Rostrum convex, with tiny marginal 

 teeth. Lateral lobes of cephalon acute, margins serrate. Color pattern in 

 small scattered red-brown chromatophores; irregular unpigmented patches 

 on cephalon. pereonite 4, and pleon; chalky-white bands on antennae and 

 uropods. 6: Pereopod 1 propodus broad, palm with three teeth, outermost 



