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

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.
Photos of Calymmaderus nitidus (5)
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 ).
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