eight-toothed cuckoo leaf-cutter bee

(Coelioxys octodentata)

               
Conservation Status

IUCN Red List

not yet assessed

eight-toothed cuckoo leaf-cutter bee

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

 

Flight/Season

One generation: May to October

Habitat

 

Size

Female: 5 16 to ½

Male: 5 16 to

         
          Photo by Bill Reynolds

Identification

This is a small, black, solitary, kleptoparasitic, leafcutting bee. Females are 5 16 to ½ long. Males are a little smaller, 5 16 to in length.

The thorax is broad and black. The hardened plate on the upper (dorsal) side of the first segment of the thorax (pronotum) is saddle-shaped. It has a small rounded lobe on each side that does not reach the tegula. The front (anterior) and rear (posterior) of the thorax have a dense fringe of white hairs. The first abdominal segment is fused to the thorax and gives the thorax the appearance of having four segments.

The abdomen is black, broad, and striped with narrow, very dense bands of short white hairs at the rear (posterior) of each segment. The abdomen of the female is cone-shaped, tapering to a very sharp point that allows it to pierce the nest of other bees. The male abdomen is armed with eight spines or teeth. There are no pollen-carrying hairs on the underside of the abdomen.

The head is black. There are two large compound eyes, one on each side of the head; and three small simple eyes (ocelli) in a triangular pattern at the top of the head (vertex) between the compound eyes. The two lateral ocelli are closer to each other than they are to the edge of the vertex. The antennae are thread-like and are not elbowed. They have 12 segments. The mandibles have 4 teeth. The tongue is long and slender.

The legs are brick-red or rust-colored from the large third segment (femur) to the foot-like segments (tarsi). There are no pollen-carrying hairs pollen baskets on the hind legs.

 
Similar
Species

 


Larval Food

Pollen provisioned by the nest builder

 
Adult Food

Flower nectar

 
Life Cycle

The female does not build a nest. It has no pollen-carrying adaptations that would allow it to provision a nest. Instead, it lays a single egg in the nest of a twig-nesting or wood-nesting bee, mostly those in the genus Megachile, but also Osmia and Anthophora. The egg hatches almost immediately. The newly hatched larvae uses its sharp mandibles to cut the egg or larva of the host in half. Eleven to sixteen days after hatching, the larva spins a cocoon.

 
Behavior

 


Distribution Distribution Map  

Sources: 24, 29.


Comments

 


Taxonomy

Order:

Hymenoptera (ants, bees, wasps, and sawflies)

 

Suborder:

Apocrita (wasps, ants and bees)

 

Infraorder:

Aculeata

 

Superfamily:

Apoidea (apoid wasps, bees, sphecoid wasps)

 

Family:

Megachilidae (leaf-cutter bees, mason bees, and allies)

 

Subfamily:

Megachilinae

 

Tribe:

Megachilini

 

Genus:

Coelioxys (cuckoo-leaf-cutter bees)

 

Subgenus:

Boreocoelioxys (northern cuckoo-leaf-cutter bees)

 
Synonyms

 

 
Common
Names

eight-toothed cuckoo leaf-cutter bee


 

 

 

 

 

 

Glossary

femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

ocellus

Simple eye; an eye with a single lens. Plural: ocelli.

 

tarsus

The last two to five subdivisions of an insect’s leg, attached to the tibia; the foot. Plural: tarsi.

 

tibia

The fourth segment of an insect leg, after the femur and before the tarsus (foot).

 

vertex

The upper surface of an insect’s head.

 

 

 

 

 

       

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Bill Reynolds


  eight-toothed cuckoo leaf-cutter bee    

       
       
       

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  Coelioxys octodentata, eight-toothed cuckoo-leaf-cutter bee
Chris Kreussling
 
   

 

slideshow

     

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Other Videos

 
  cuckoo-leaf-cutter Bee taken with samsung grand prime
Small World
 
   
 
About

Published on Sep 4, 2016

Macro video by smartphone
'Banyumas Macro Photography'
Instagram : @e_waluyo

 
     

 

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Bill Reynolds
8/26/2017

Location: Pennington Co. MN

eight-toothed cuckoo leaf-cutter bee


     
     
 

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