Empria

Lepeletier & Serville, 1828

Species Guides

Empria is a of in the Tenthredinidae, distributed across the Palaearctic region with records from Europe, Japan, and other parts of Asia. within the genus are primarily herbivorous, with documented plant associations predominantly in Rosaceae and a single record in Ericaceae. The genus includes several morphologically similar species groups that have required taxonomic revision using integrated approaches combining , morphometrics, and molecular data.

Empria salicis by the Smithsonian. Used under a CC0 license.

Empria affinis by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Empria: /ˈɛmprɪə/

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Identification

-level identification in Empria often requires examination of subtle morphological characters and may necessitate molecular analysis. The includes several species groups defined by distinctive features: the E. longicornis group is characterized by elongated , while the E. hungarica group shows a paired whitish patch on 1. Male association with females and larval identification have been established for some species through ex ovo rearing. Geometric and traditional morphometrics, along with nuclear ITS sequences, have proven more reliable for species delimitation than mitochondrial COI sequences, which are considered unsuitable for within the group.

Images

Distribution

Palaearctic distribution, with confirmed records from Europe (including northern Europe, central Europe, and the Black Sea coastal zone), Japan, and Russia. Specific distributional notes include: Empria pravei is restricted to the coastal zone of the Black Sea; E. pumiloides has been recorded from Russia and Germany; E. hungarica has its northernmost records in Estonia (Saaremaa). Fossil representatives are known from the upper Miocene of France.

Diet

Herbivory on plant foliage. Larvae feed on leaves of plants.

Host Associations

Rosa multiflora - Rosaceae; recorded for E. honshuana and E. quadrimaculata in Japan
Rubus sp. - Rosaceae; recorded for E. japonica in Japan
Geum japonicum - Rosaceae; recorded for E. loktini and E. tridentis in Japan
Geum calthifolium var. nipponicum - Rosaceae; recorded for E. loktini in Japan
Potentilla indica - Rosaceae; recorded for E. quadrimaculata in Japan
Rubus parvifolius - Rosaceae; probable for E. quadrimaculata in Japan
Rhododendron molle subsp. japonicum - Ericaceae; first record of Ericaceae as for Empria; recorded for E. takeuchii in Japan
Filipendula camtschatica - Rosaceae; recorded for E. tridentis in Japan

Life Cycle

Holometabolous development with , larval, pupal, and stages. Ex ovo rearings have been conducted to verify plants and confirm male associations.

Similar Taxa

EmphytusBoth are of Tenthredinidae ; distinguished by morphological characters, with fossil representatives of both genera found in the same upper Miocene deposits in France
PoecilosomaHistorical name; several Empria were originally described under Poecilosoma and later transferred to Empria (e.g., P. longicornis, P. mongolica, P. tridens)
SciapteryxRelated tenthredinid ; both genera contain restricted to the Black Sea coastal zone (Empria pravei and Sciapteryx byzantina)

More Details

Taxonomic Complexity

Empria has been subject to extensive taxonomic revision due to the presence of cryptic and morphological similarity among species. The E. longicornis species group alone required integrated analysis of external , geometric and traditional morphometrics, and sequences (ITS1, ITS2, COI) to resolve species boundaries. Several synonymies have been established, including E. konowi and E. gussakovskii as synonyms of E. tridens, and E. waldstaetterense as a synonym of E. alector.

Host Plant Evolution

The majority of documented Empria feed on Rosaceae, but the discovery of E. takeuchii on Rhododendron (Ericaceae) represents the first record of a non-rosaceous for the . This host shift has been used to infer evolutionary patterns of host association in the genus, suggesting that host shifts have occurred during the diversification of Empria.