THE WATER FLEAS (CLADOCERA) 



73 (74) 



Valves smooth; 

 middle: 



ephippium reticulated around edges, smooth in 

 antennules of male with sense sc-ta near middle. 



Moina rcctirostris (Loydig) i860. 



Colorless, or with bluish cast. Head extended or liitic depressed- .!,.<. . .r. ;. .1 1 



ocular depressions. Post-abdomen with long ' ' 



projection and 10-15 post-anal spines and C 

 bident. Claws pectinate. Antennules of $ ' 

 with 5-6 hooks at apex. Length, V, 1.0-2.0 /> 



Widely distrih- ' N^ 

 muddy 



0.4-0.6 to i.o mm. 



uted; 



pools, 



Fig. 1092. Male antennule. A, Moina rcctirostris. B, M. affinis 

 C, M. macrocopa. 



0.1 MM. s—^ 

 09^ Ephippium A \fmma 

 H.U jfimi,. ( . i/ 

 {A an<lt .iflcT ISI\)9- 



74 (73) Valves striate; ephippium reticulated all over; antennules of male 

 with sense seta near base. . . . Moitui affinis Birgc iSq\. 



005 MM L 



!7S3 



Much like .\f . rcctirostris, from which the 

 young 9 ^re hardly distin>:uish;ihlf .\ntm- 

 nules of $ broad, frin^ri-d with lint- hair> »jo 

 inner margin; 4-0 h(H)ks at end. Ix-n^th. 9t 

 0.8-1.0 mm.; ^.o.s-o.Omm. 



Wisconsin to Louisiana. 



M. rcctirostris, affinis. and briukiiitii ha\*e 

 been often confused in faunal list.«i. 



Fig. 1094. Moina affinis, apex «>f pml-abdomen. 



75(70) No supra-ocular depression; claws not pectinate; antennules of male 

 with sense seta in middle or l)eK)\v; hrsl foot of male 

 with long flagellum. . Moifui ynacroiopii Straus i8.'o. 



Not very transparent; yellowish or grernish. J! ' -• ■ r.\. 

 Terminal part of post-abdomen long, with 10- 1: <-* 



bident. Two ephippial eggs. ^ with eK»ngatitl h. ^» 



on antennule. Length, 9, to 1.8 mm:^ . o.s-<).f> mm. 



Pools, Wisconsin, Nebra.ska, Colorado. N. Dakota: doubtlcM 

 widely distributed. , ,, a n . it 



This species is M. paraJoxa Wcismann anil .1/. fl<igciUi<i liu- 



dendorf. 



Fig. loys Moina macro<.vpi. 



0.2 MM. 



