Phosphaenus hemipterus

(Geoffroy, 1762)

Lesser Black Glow-worm, Short-winged Firefly, Lesser Glow-worm

Phosphaenus hemipterus is a firefly in the Lampyridae, commonly known as the lesser black glow-worm or short-winged firefly. Native to Europe and the Mediterranean region, it has been introduced to North America. The species is notable for its reduced wing size in females and its elusive nature, with larvae exhibiting specialized predatory and communication.

Phosphaenus hemipterus by Urs Rindlisbacher. Used under a CC BY 3.0 license.

Phosphaenus-hemipterus-04-fws by Francisco Welter-Schultes. Used under a CC0 license.

Phosphaenus-hemipterus-05-fws by Francisco Welter-Schultes. Used under a CC0 license.

Pronunciation

How to pronounce Phosphaenus hemipterus: /fɒsˈfiːnəs hɛmˈɪptərəs/

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Identification

Distinguished from other central European lampyrid larvae (Lamprohiza splendidula and Lampyris noctiluca) by morphological features detailed in comparative keys. Larvae possess distinct external sense organ arrangements visible under scanning electron microscopy. females are with short wings, unlike the fully winged males.

Images

Appearance

males have fully developed wings; females are with short, reduced wings (hemipterous condition). Larvae have been thoroughly redescribed with detailed scanning electron microscope imagery showing external sense organs.

Habitat

Meadows, floodplains, forest edges, and dry slopes; also occurs in anthropogenic including parks and gardens.

Distribution

Native to the Mediterranean, Central Europe, west to the Atlantic Ocean, and north to the edge of Scandinavia and England. Introduced and established in North America. Present in Europe and Northern Asia (excluding China).

Diet

Larvae are predatory; specific prey items not documented in available sources.

Life Cycle

Development includes , larval, and stages. Specific timing and duration of life stages not documented in available sources.

Behavior

Larvae exhibit predatory and a specific lifestyle adapted to their . communication has been documented. The is described as elusive, with limited observational records despite relatively broad distribution.

Human Relevance

In Britain, considered fairly rare compared to the common glow-worm (Lampyris noctiluca). Subject of scientific interest due to its unique and elusive nature.

Similar Taxa

Lamprohiza splendidulaOverlapping distribution in Central Europe; distinguished by larval and external sense organ arrangement
Lampyris noctilucaOverlapping distribution in Central Europe and shared 'glow-worm'; distinguished by larval and more common status in Britain

More Details

Taxonomic Note

Authority sometimes cited as (Fourcroy, 1785) or (Goeze, 1777) in literature; Geoffroy, 1762 is the accepted authorship in major databases.

Research Significance

The mature larva was thoroughly redescribed in 2018 with detailed scanning electron microscope figures, representing significant advancement in understanding this elusive ' .