Mordellidae

Latreille, 1802

tumbling flower beetles, pintail beetles

Tribe Guides

is a of beetles in the superfamily Tenebrionoidea, comprising approximately 1500 worldwide. are commonly found on flowers and are known for their distinctive escape involving rapid, irregular tumbling movements. The family contains two extant (Mordellinae and Ctenidiinae) and one fossil subfamily (Praemordellinae). Larval development occurs in diverse substrates including plant stems, wood, and fungi, with some species exhibiting or habits.

Mordellina by (c) Kimberely G., some rights reserved (CC BY), uploaded by Kimberely G.. Used under a CC-BY license.

Mordella lunulata by (c) Louise Woodrich, some rights reserved (CC BY), uploaded by Louise Woodrich. Used under a CC-BY license.

Falsomordellistena by (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug. Used under a CC-BY license.

Pronunciation

How to pronounce Mordellidae: //mɔːrˈdɛl.ɪˌdiː//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

distinguished by a pointed abdominal tip () and humpbacked body profile. The tumbling escape —rapid, irregular jumping —is diagnostic when observed. Metacoxa- joint possesses a screw-like structure enabling up to 270 degrees of rotation, facilitating the characteristic jumping mechanics. Body typically small (2-10 mm), with shortened that may expose terminal abdominal segments. usually serrate or .

Images

Habitat

Diverse including temperate and tropical forests, grasslands, and areas. Specific requirements vary by : some require preserved natural forests with large dead wood (e.g., Mordellochroa milleri), others inhabit riverbeds and disturbed vegetation (e.g., Mordellistena species on Artemisia), and some occur in xerothermophilous grasslands, floodplain forests, oak-beech woodlands, or urban ruderal vegetation.

Distribution

distribution with records from all major biogeographic regions. Western Palearctic: extensively documented across Europe, North Africa, and Central Asia including Albania, Algeria, Armenia, Austria, Azerbaijan, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, France, Georgia, Germany, Greece, Hungary, Iran, Iraq, Italy, Kazakhstan, Kyrgyzstan, Morocco, Montenegro, Netherlands, North Macedonia, Poland, Portugal, Romania, Russia, Slovakia, Spain, Sweden, Switzerland, Syria, Tajikistan, Tunisia, Turkey, Turkmenistan, Ukraine. Nearctic: documented from Canada (Ontario) and United States (Vermont, Georgia). Fossil representatives known from Eocene deposits (Green River Formation, Colorado).

Diet

are pollinivorous, feeding on pollen and floral tissues of herbaceous plants. Documented flowers include Helichrysum, Daucus carota, Chrysanthemum, Cirsium, Achillea, Tithymalus, Nelumbo, and Euphorbia. Some feed on fern spores (Glipa) or fungal spores.

Host Associations

Helichrysum - feedingpollen source
Daucus carota - feedingpollen source
Chrysanthemum - feedingpollen source
Cirsium - feedingpollen source
Achillea - feedingpollen source
Tithymalus - feedingpollen source
Artemisia indica var. maximowiczii - larval stem-gall formation by Mordellistena brevilineata and M. fuscosuturalis
Artemisia absinthium - larval Mordellistena falsoparvula
Artemisia vulgaris - larval Mordellistena falsoparvula
Apiaceae - larval Mordellistena falsoparvula
Arctium - feedingpollen source
Centaurea salonitana - feedingpollen source
Asteraceae - larval Mordellistena kraatzi
Nelumbo - feedingpollen source
Euphorbia - feedingpollen source
Polyporaceae - larval developmentsporocarp inhabitant (Curtimorda, Mordella marginata)

Life Cycle

Larval development occurs in diverse substrates: stems of herbaceous plants (Mordellistena, Mordellistenula), wood (Mordella, some Mordellistena), sporocarps of Polyporaceae fungi (Curtimorda, Mordella marginata), or as of other insect larvae or in colonies. Some induce stem-galls on plants. Development time and mortality factors vary; (Eupelmus sp., Entedon sp., braconids) account for approximately 25% of observed mortality in studied . Gall thickness correlates with survival probability.

Behavior

Characteristic tumbling escape consists of rapid, irregular jumping (up to 48 per second in Mordellochroa abdominalis) achieved through sequential extension of metathoracic legs. Each jump lasts approximately 80 ms and functions to reposition the for initiation when disturbed from lateral or positions. Direction of tumbling alternates based on which metapodium provides leverage. are active on flowers and can be collected by sweeping vegetation.

Ecological Role

contribute to pollination through pollen consumption. Larval stages participate in nutrient cycling through wood and stem decomposition; saproxylic contribute to dead wood breakdown in forest . Some larvae function as or in other insect colonies. Gall-inducing species modify plant growth patterns.

Human Relevance

Occasional subjects of ecological and behavioral research due to distinctive locomotion mechanics. Some of interest for conservation monitoring as indicators of old-growth forest conditions with abundant dead wood. No significant economic impact documented; neither major pests nor beneficial biocontrol agents.

Similar Taxa

Melandryidae (Serropalpidae)Possess similar - joint structure enabling analogous jumping , though less powerful; Orchesia exhibits technically similar but weaker tumbling locomotion
ScraptiidaeShare similar - joint ; Anaspis performs comparable but less powerful jumping movements
Trigonopterus (Curculionidae)Possess even tighter - joint construction, but joint functions for plant grip and climbing rather than tumbling; no high angular velocity torque capacity