The Buzz about Pachymelus


Welcome to the fascinating world of Pachymelus, an intriguing group of bees that play a crucial role in our ecosystems. These bees exhibit unique behaviors and characteristics that set them apart from other taxa within the Apoidea superfamily.


The genus name Pachymelus is derived from the Greek words “pachys,” meaning thick, and “melos,” which translates to limb. This likely refers to the robust physical build of these bees compared to other bee taxa.

Physical Characteristics

Identifiable Traits

When it comes to identifying a Pachymelus bee, several key physical traits can help distinguish them:

  • Body Shape: Typically displays a Bombiform or Apiform body shape.
  • Coloring: Often seen in combinations of yellow, black, and white hues.
  • Antennae: Medium to long in length.
  • Hair: Possesses dense, short hair covering the thorax and abdomen.
  • Abdomen: May feature striped patterns.

Ecological Significance

Pachymelus bees are vital pollinators, playing a crucial role in the reproductive success of many plant species. Through their foraging activities, these bees facilitate the transfer of pollen, contributing to plant diversity and ecosystem stability.


These bees can be found in various regions across the globe, with some species exhibiting specific habitat preferences. They are known to thrive in diverse environments, from temperate forests to arid grasslands.

Social Behavior

Pachymelus bees exhibit diverse social behaviors, with some species being solitary while others form small colonies. Their social structures often depend on factors such as resource availability and nesting opportunities.

Nesting Practices

Depending on the species, Pachymelus bees may construct nests in the ground, wood cavities, or plant stems. These nests provide shelter for their brood and serve as a central hub for their foraging activities.

Floral Specialization

Some Pachymelus species exhibit floral specialization, displaying a preference for specific plant species for nectar and pollen collection. This specialization plays a crucial role in maintaining plant-pollinator relationships.

Natural Predators

Like many other bee taxa, Pachymelus bees face threats from predators such as birds, spiders, and insect parasites. Adapting defensive strategies and nesting behaviors help these bees mitigate predation risks.

Conservation Status

While specific data on the conservation status of Pachymelus bees may vary, it is essential to recognize the importance of preserving their habitats and ensuring their continued presence in ecosystems. Habitat loss, pesticide use, and climate change pose significant challenges to their survival.

Human Impact

As pollinators, Pachymelus bees contribute to food security and biodiversity. Human activities such as agricultural practices and urbanization can have both positive and negative impacts on these bees, highlighting the need for sustainable coexistence.

Interesting Facts

Pachymelus bees exhibit a remarkable diversity in their foraging behaviors, with some species displaying complex interactions with host plants.

– The intricate patterns on the abdomens of Pachymelus bees serve as a form of communication within their colonies.


For further reading and research on Pachymelus bees, we recommend the following studies:


  • Name: Pachymelus
  • Rank: subgenus
    • Nesting:
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    • Size:
    • Average Length: mm
    • Body Type:
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    • Pattern:
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    • Wings:
    • Eyes:
    • Mandibles:
    • Sting:
    • Tarsal Claws:
    • Abdomen:
    • Antennae:
    • Hair:
    • Colorado Native:
    Additional Notes:

    Identification Tips:

    ID: 578084

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