COPEPODA OF THE OKOBOJI REGION 
PRANK A. STROMSTEN 
BRANCH: ARTHROPODA 
Class: Crustacea 
SUBCLASS : ENTOMOSTRACA 
Order: COPEPODA 
Suborder: Eucopepoda 
Group: GNATHOSTOMA 
FAMILY iCBNTROPAGIDAB 
Genus Diaptomus 
Diaptomus oregonensis Lilljeborg 1889. Okoboji. Kettle holes and Gar 
lakes. Abundant in June and July. 
Diaptomus pallidus Herrick 1879. Abundant in Middle Gar lake and in 
some kettle holes. 
Diaptomus leptopus Forbes 1882. 
Diaptomus clavipes Schacht 1897. Common in East Okoboji and a few 
kettle holes. 
Diaptomus sicilis Forbes 1882. Abundant in lakes and kettle holes. 
Diaptomus sanguineus Forbes 1876. Not common in summer in drainage 
canal. Also found in one surface tow of West Okoboji lake (Miller’s 
Bay). 
Diaptomus signacauda Lilljeborg 1889. Surface tow, West Okoboji lake. 
Diaptomus siciloides Lilljeborg 1889. Very abundant in kettle holes and 
West Okoboji lake in late summer. 
FAMILY: CYCLOPIDAB 
Genus. Cyclops 
Cyclops ater Herrick 1882. Very abundant in kettle holes and lake. 
Cyclops viridis Jurine 1820. Found in one kettle hole 
Cyclops veridis americanus Marsh. Common in kettle holes. 
Cyclops modestus Herrick 1883. Kettle holes. 
Cyclops serrulatus Fischer 1851. Common and most widely distributed. 
Cyclops prasinus Fischer 1860. Not common. 
Cyclops phaleratus Koch 1838. Very abundant in kettle holes and lakes. 
Cyclops bicolor Sars 1863. Abundant in kettle holes. , 
Cyclops fimbriatus Fisher 1853. Very abundant in drainage canal and 
lakes. 
Cyclops fluviatilis Herrick. Abundant everywhere. 
Cyclops signatus var. cornatus Herrick. Kettle holes. Not common. 
Cyclops signatus var. tenuicornis Herrick. Kettle holes. Not common. 
