Cedar Creek
Ecosystem Science Reserve

Insects of Cedar Creek




(Table of Species)

The Weevils of Cedar Creek (2614 NA spp) are diverse (nearly 100 species collected) and save for those occuring in old fields have been inadequately surveyed. They feed upon the seeds of plants or bore into stems and roots and are generally quite host specific. Several taxonomic difficulties remain to be resolved in this group. They will be discussed by subfamily.

Possibly 5 undifferentiated species of Apion (hairy, black...) have been collected primarily from prairie. Apion 'hairy' occurs commonly in FC and I suspect it feeds on strawberry (Fragaria). Apion 'black' may feed primarily on legume seeds (Vicia).

Rhynchites bicolor is commonly found on Prairie Rose (Rosa arkansana) in dry prairie. Smaller and less common is Rhynchites aeratus.

One species of leaf-rolling Attelabus has been collected-- A. rhois on sumac.  In addition, Homeolabus analis has been found on oak.

Cimberis sp has been collected from staminate red pine cones.

Ithycerus noveborecensis has been collected.

Several species of Sitona have been collected from CCESR old fields. Numbers are highest in early summer. The most common species Sitona tibialis has been collected from a variety of fields. Sitona flavescens and Sitona hispidula are considerably less common. Other species of Sitona may be present.  These beetles are reported to feed on legume roots. Pandeleteius hilaris has been taken sparingly in savanna.

The Strawberry Root Weevil, Otiorhynchus ovatus, is fairly common in drier fields containing its host. Hormorus undulatus has been collected from Helianthusrigidus in sand prairie.

Anametis granulata has been collected from a few fields.

Lechriops oculatus collected.

These short-snouted weevils are fairly common. Rhyssematus lineaticollis is a large black species found on common milkweed (Asclepias syriaca). Tyloderma aerea and T. foveolata occur on primrose (Oenothera spp). Conotrachelus (3+spp--nenuphar, geminatus, crataegi?) have been collected as has Cryptorhynchus lapathi (Salix?).

Mononychus vulpeculus occurs in the seed pods of Blue Flag (Iris versicolor). Acanthoscelidius acephalus in the seed pods of Oenothera. Rhinoncus (3 spp--pyrrhopus, longulus, pericarpius): R. pyrrhopus is common on Rumex acetocella. Coeliodes flavidaudis, Auleutes cruralis?, Pelenomus sulcicollis, and Ceutorhynchus (3+spp incl cyanipennis)  also collected.

Dryophthorus americana has been taken from pine.

Myrmex chevrolatti, a shiny black ant mimic, collected from woodland.

Curculio (4 spp--baculi???) collected from woodlands. These long-snouted weevils bore into fruits such as acorns, walnuts, etc.

Gymnetron tetrum (host--mullein, Verbascum thapsus) is occasionally encountered on its host. Miaris sp. (host--Butter and Eggs, Linaria vulgaris) has been taken on its host in SYS.

Lepyrus palustris and Lixus (3+spp--caudifer, concavus, rubellus) are associated with marsh vegetation.

Species of Listronotus (4+spp--appendiculatus, latiusculus, squamiger, tuberosus) are primarily associated with aquatic/marsh vegetation. The first two occur on arrowhead (Saggitaria).

Hylobius spp (congener+) has been collected from woods and savanna.

Pissodes dubius has been collected from white pine.

Perhaps three species of Flea Weevils, Rhynchaenus (?illinoiensis, niger, ephippiatus), have been collected.

Two species of Piazorhinus (scutellaris, pictus) collected from woodland.

Sphenophorus (4+spp--costipennis, parvulus, pertinax, setiger?) are associated with grasses/sedges in wet areas.

Phytonomus nigrirostris (green) and Phytonomus posticus (brown) and the larger Hypera punctata have been taken in several fields. Reported to feed on roots of Legumes.

Tychius picirostris and Tychius griseus? have been taken in a few fields as has Thysocnemis fraxini?.

Smicronyx (2+spp) are fairly common in mid-summer in a variety of fields. Seldom encountered species in this subfamily include Desmoris constrictus, Dorytomus brevicollis, Pachyphanes corpulentus, and Acalyptus/Phyllotrox sp. Aquatic species collected include: Bagous americanus, Tanysphyrus lemnae, and Onychylis nigrirostris.

Several undifferentiated species of Anthonomus have been taken in small numbers in a variety of fields. Anthonomus ?robustulus is found on Solidago gigantea, Anthonomus'gray' on Artemisia ludoviciana, and AnthonomusLG-stripe occurs in xeric fields. Tachypterellus quadrigibbus is found on apple, and Pseudanthonomus crataegi on xx.

In this group are the most commonly encountered old field weevils. Odontocorynus scutellum-album is the common species seen on the heads of composites mid-late summer. It is common and ubiquitous. ?Centrinaspis (thin beak) and ?Limnobaris (thick beak) are two other common, widely distributed species (may be male & female of same species) occuring chiefly on weedy Asteraceae. A few undifferentiated species of Baris have also been collected in small numbers. Baris LG=striata has been taken in a few fields as has Baris americana. Baris'small' is routinely seen on Artemisia ludoviciana. Madarellus undulatus (host--Vitis?) is taken sparingly in savanna. Barilepton quadricolle collected near lake edge.

webmaster@cedarcreek.umn.edu Last updated May, 2000