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Classification

........Agaocnemis Moser, 1918

Superfamily.....
Family.............
Subfamily.......
Tribe...............
Scarabaeoidea
Scarabaeidae
Melolonthinae
Macrodactylini
 
Melolonthinae Tribes
Diplotaxini
Hopliini
Lichniini
Liparetrini
Macrodactylini
Melolonthini
Oncerini
Pachydemini
Podolasiini
Sericini
Sericoidini
Incertae sedis
 
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Agaocnemis pruina Moser: paratype male
Photos by Kerry Katovich.
.
Agaocnemis Moser: Female
photo by Kerry Katovich
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Distribution of Agaocnemis pruina.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Distribution: Agaocnemis pruina: Brazil.

 

Generic Diagnosis: This genus is identified by its elongate body, quadrate prementum, lobed ventral surface (Fig. 1), in males the strongly clavate metathoracic tibia, with the distal margin broadly rounded, setose (Fig. 2); 6th ventrite equal in length to that of the 4th ventrite, flattened medially, forming an ovate region (Fig. 3).

 
 
 
 
 
Fig. 1 Prementum,
ventral view
Fig. 2 Metatoracic femur & tibia of male
Fig. 3 Male abdomen, ventral view
.
 
 
 
 
 
 
 
 

Composition: Agaocnemis is monotypic.
Agaocnemis pruina Moser, 1918 (type species by monotypy)
type location: Holotype located at the ZMHB
.

 
 
 

Taxonomy:
Moser, J. 1918. Neue amerikanische Melolonthiden (Coleoptera). Stettiner Entomologische Zeitung 79: 95-167.

Notes: This genus is similar in appearance to Plectris (Macrodactylini). The distinctive prementum and the characteristic metathoracic tibia of Agaocnemis males will separate this genus. The prothoracic tarsomeres of the male are broadly clavate, similar to those of Liogenys (Diplotaxini). As more material becomes available the validity of this genus can be evaluated.

 
 
 
 
 
 
 
 
 
 

Generic Description
Measurements:
Prothorax at widest point 4.7 mm, elytra at widest point 5.8 mm, length 12.7 mm.

Color and vestiture: Body dark brown, vestiture comprised of small reddish-brown setae.

Head: Clypeus not coplaner with frons; frons angled at 30°; labrum in frontal profile broadly ovate, deeply emarginate, quadrate, ventral surface raised medially; labium with prementum quadrate, medially quadrate, ventral surface raised medially; antennae 10-segmented, segments 8-10 forming an elongate club, the length of which equal to combined length of segments 3-7.

Prothorax: Pronotum oblong, transverse, widest in posterior 1/4, anterior angles acute, lateral margins convex, posterior angles obtuse, posterior margin convex, medially lobed, dorsal surface rounded; coxa transverse, tibia with dorsal margin bidentate; tarsomeres broadly clavate; pretarsus with claws divergent, equal in length, claws narrowly split.

Mesothorax: Scutellum subtriangular; elytra longer than wide, widest in anterior 1/4th, elytral epipleuron flattened, dorsal surface lacking striae, anterior and posterior umbones well developed; pretarsus similar to prothoracic pretarsus.

Metathorax: Metathoracic leg with coxae contiguous; femur ovate, widest in distal 1/2; tibia very strongly clavate, narrow in proximal 1/2, widest in distal 1/2, posteroventral margin with two stout, long spurs, spurs arise at same level as tarsal articulation joint, posterior margin with a shallow, U-shaped groove; pretarsus with claws similar to those of prothoracic legs.

Abdomen: Ventrites 2-4 equal in length, 5th ventrite (= propygidium) equal in length to combined lengths of ventrites 3-4, ventrite and sternite of 5th abdominal segment not separated by a distinct suture; 6th ventrite equal in length to that of ventrite 4, flattened medially, forming an ovate region; pygidium subtriangular, wider than long.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Agaocnemis pruina Moser 1918: 116
Diagnosis: this species is recognized by elongate body, quadrate prementum, lobed ventral surface, in males the strongly clavate metathoracic tibia, with the distal margin broadly rounded, setose; in males tarsomeres broadly clavate (Fig. 3); 6th ventrite equal in length to
that of the 4th ventrite, flattened medially, forming an ovate region.

 
 
 
 
 
.
Fig. 3 Prothoracic tarsomeres of male
Genitalia male, caudal view
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Larvae: Unknown

   
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Author: Kerry Katovich
Generated on: 24/JAN/2007

UNL State Museum - Division of Entomology