Protobombus indecisus

Overview

Protobombus indecisus is an Eocene fossil bee preserved in Baltic amber. The head, wings, and legs of a female worker were studied. An insect enclosed in a small piece of amber conveys a body from tens of millions of years ago.^[1]

Key facts

When a piece of amber contains two individuals, which bee should serve as the name-bearing reference? The researcher designated one female worker as a new type specimen. This is a story of examining an amber insect together with collection records.^[1]

Time and place

It is a bee known from Eocene Baltic amber. The fossil-bearing strata are grouped as material from roughly 38–34 million years ago. Amber associated with the present-day Baltic region preserved this small ancient insect.^[1]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

The described specimen was reported as 8.31mm long, with a forewing length of 7.38mm. Three cells formed by veins near the forewing margin are described. The small bee’s head, wings, and legs can be compared in detail.^[1]

Habitat and reproduction

Hairs around the pollen basket are described on the female’s legs. Such structures offer clues for exploring relationships between ancient bees and plants. Body features identified as those of a worker are compared with the wings in research on early bee life.^[1]

Fossil discovery

Engel’s 2001 study of Baltic amber bees designated B-JH98 AMNH as a new type specimen. It clarified which of the two bees in the amber served as the reference, together with wing and body features. Collection records of a small insect are important for stable use of a name.^[1]

References

1. A Monograph of the Baltic Amber Bees and Evolution of the Apoidea (Hymenoptera)
2. Palaeovespa — Morphology and discovery of fossil wasps from Florissant

Research questions

How were ancient bees in amber related to bees living today? Wing venation and features of the head and legs are compared together. Examining the basis for identifying the specimen as a female worker alongside other bee forms helps explore the history of this group.^[1]

Observation

Move your gaze from the head and antennae to the wings and legs. Imagining the small cells formed by veins within the thin wings brings the detailed structures used to distinguish insects closer.^[1]