ColeopteraPtinidae – Death-watch and Spider Beetles

Ptinus tumidus

This record describes Ptinus tumidus (species). Recorded family: Ptinidae. Recorded order: Coleoptera.

Identification and Appearance

Ptinus tumidus - Ptinus tumidus
Contributed by Mike Quinn

Type Specimen collected by H.S. Barber at Los Borregos, Brownsville, Texas, 24.V.1904. (Fall 1905) Texas considers this to be a Species of Greatest Conservation Need (SGCN) ( 5 )

Classification

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

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

Habitat and Range

Geographic Range

southmost TX (Hidalgo & Cameron Co.) - Map ( 3 ) ( 4 )

Seasonal Activity

Number of compiled Texas collecting events by month: May, June, October.

Diet and Behavior

Diet: Species of Ptinus appear to have diverse feeding habits. Some are woodborers, most feed on dried animal and plant remains, some are bird or mammal nest inhabitants, and some feed on pollen stored in bees’ nests [various citations in Philips 2002].

Additional species information

Species notes from the sources

Etymology: Ptinus tumidus Fall 1905

About Primitive Winged Insects: the wider group

Order-level background for Coleoptera, the group containing Ptinus tumidus. 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 Ptinus tumidus (2)

Ptinus tumidus - photo 1
Contributed by Mike Quinn
Ptinus tumidus - photo 2
Contributed by Mike Quinn

Photo credits: Contributed by Mike Quinn

Frequently Asked Questions About Ptinus tumidus

What is Ptinus tumidus?

Ptinus tumidus is a species in the family Ptinidae, within the order Coleoptera.

How big is Ptinus tumidus?

Body length is ca. 2.5 mm. ( 3 )

Where is Ptinus tumidus found?

Range: southmost TX (Hidalgo & Cameron Co.) - Map ( 3 ) ( 4 )

What does Ptinus tumidus eat?

The diet of the Ptinus tumidus includes Species of Ptinus appear to have diverse feeding habits. Some are woodborers, most feed on dried animal and plant remains, some are bird or mammal nest inhabitants, and some feed on pollen stored in bees’ nests [various citations in Philips 2002]..

When is Ptinus tumidus active?

Ptinus tumidus: seasonal activity - Number of compiled Texas collecting events by month: May, June, October..

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

Photo credits: Contributed by Mike Quinn. Contributors retain copyright over their individual contributions.