Characteristics
1st maxiliped exopod ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) absent well developped small unarticulated
2nd thoracopod exopod ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) well developped absent
2nd thoracopod shape ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) as maxilliped as gnathopod
3-8 thoracopod carpopropodus ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) devided into a few subsegments segmentation increases posteriorly devided into several subsegments not applicable non segmented
3-8 thoracopod endopod carpus propodus ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) distinct fused
3-8 thoracopod propodus ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) two-three subsegments two subsegments unsegmented not applicable segmentation increases posteriorly
3th thoracopod shape ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) forming pereopod forming gnathopod
4th thoracopod shape ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) forming a pereopod forming a gnathopod
antennal scale outer margin ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) smooth serrated not applicable
antennal scale outer margin setation ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) setose without setae not applicable
antennal scale precense ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) present reduced absent
antennal scale suturation ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) without apical suture with apical suture not applicable
antennal scale terminal spine ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) with spine without spine not applicable
eyes ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) normally developped reduced
female pleopods ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) uniramous or greatly reduced biramous 1st biramous, remaining reduced
labrum ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) symmetric assymetric produced anteriorly
mandible lacinia mobilis ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) well developed reduced or absent
mandible molar process ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) well developped reduced
mandible spines between lacinia mobilis and proces ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) present absent reduced to single spine
marsupium ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 2 pairs 3 pairs 7 pairs
maxillule endopod ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) reduced with two articles
pleopods fifth pair ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) biramous reduced
pleopods fourth pair ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) biramous modified exopod modified endopod
pleopods second pair ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) biramous exopod elongated rudimentary
pleopods third pair ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) biramous exopod elongated reduced
rostrum ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) obtuse elongated broadly rounded
telson cleft ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) apex entire apex cleft lateral margins constricted
uropod endopod devision ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) undevided distal articulation
uropod endopod inner margin ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) inner margin robust setae setose all around
uropod endopod statocyst ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) present absent
uropod exopod devision ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) complete with proximal articulation with distal articulation
uropod exopod setation ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) setose around entire margin outer margin with slender and robust setae outer margin entire outer margin with robust setae | Remaining taxa: Aberomysini Bacescu & Iliffe, 1986
Boreomysinae Holt & Tattersall, 1905
Erythropini Hansen, 1910
Gastrosaccinae Norman, 1892
Heteromysini Norman, 1892
Lepidomysidae Clarke, 1961
Leptomysini Czerniavsky, 1882
Mancomysini Bacescu & Iliffe, 1986
Mysidellinae Czerniavsky, 1882
Mysini Haworth, 1825
Petalophthalmidae Czerniavsky, 1882
Rhopalophthalminae Hansen, 1910
Siriellinae Czerniavsky, 1882
Stygiomysidae Caroli, 1937
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