ColeopteraPtinidae – Death-watch and Spider Beetles

Calymmaderus nitidus

This record describes Calymmaderus nitidus (species). Recorded family: Ptinidae. Recorded order: Coleoptera.

Identification and Appearance

Calymmaderus nitidus - Calymmaderus nitidus
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov

Following combination is diagnostic within genus: Body glabrous, very shiny, practically no hairs and distant punctures dorsally; last ventral segment with impressed line bordering apical margin, interrupted medially.

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Coleoptera (Beetles)
Suborder
Polyphaga
Superfamily
Bostrichoidea
Family
Ptinidae (Death-watch and Spider Beetles)
Subfamily
Dorcatominae
Genus
Calymmaderus

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

e NA, AZ (QC-s.FL to WI-s.TX, AZ) / Bahamas - Map

Seasonal Activity

mostly Apr-Jul ( 4 ) ( 3 )

Diet and Behavior

Diet: recorded in oak and elm twigs

About Primitive Winged Insects: the wider group

Order-level background for Coleoptera, the group containing Calymmaderus nitidus. Species-specific details appear above.

Group overview

Coleoptera is the largest order of insects with over 400,000 described species, representing ~25% of all known animal species and ~40% of all insects. In the U.S. alone, nearly 30,000 beetle species have been identified.

Ecological role of the group

Beetles are prominent decomposers, especially in forests, breaking down dead wood and recycling nutrients. As predators, they reduce populations of pest insects. Many species are also important pollinators of flowering plants.

Economic and practical significance of the group

Beetles have major economic significance: leaf beetles (Chrysomelidae) and weevils (Curculionoidea) are among the most destructive agricultural pests globally, costing billions annually, while predatory species like ladybugs provide natural pest control.

Recorded sources for this group: Britannica, Smithsonian, NCSU Entomology. Imported estimates may describe particular regions or reporting periods.

Explore Coleoptera families and species →

Photos of Calymmaderus nitidus (5)

Calymmaderus nitidus - photo 1
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov
Calymmaderus nitidus - photo 2
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov
Calymmaderus nitidus - photo 3
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov
Calymmaderus nitidus - photo 4
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov
Calymmaderus nitidus - photo 5
Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov

Photo credits: Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov

Frequently Asked Questions About Calymmaderus nitidus

What is Calymmaderus nitidus?

Calymmaderus nitidus is a species in the family Ptinidae, within the order Coleoptera.

How big is Calymmaderus nitidus?

2.5–3.0 mm

How do you identify Calymmaderus nitidus?

Following combination is diagnostic within genus: Body glabrous, very shiny, practically no hairs and distant punctures dorsally; last ventral segment with impressed line bordering apical margin, interrupted medially.

Where is Calymmaderus nitidus found?

Range: e NA, AZ (QC-s.FL to WI-s.TX, AZ) / Bahamas - Map

What does Calymmaderus nitidus eat?

The diet of the Calymmaderus nitidus includes recorded in oak and elm twigs.

When is Calymmaderus nitidus active?

Calymmaderus nitidus: seasonal activity - mostly Apr-Jul ( 4 ) ( 3 ).

How we use and review source data. Source count does not imply independent verification.

Photo credits: Contributed by Boris Büche; Additional contributions by Bbarnd , Mike Quinn , v belov. Contributors retain copyright over their individual contributions.