Nematinae
Guides
Euura
Euura is a genus of sawflies in the family Tenthredinidae, subfamily Nematinae, with exceptional species diversity concentrated in northern Holarctic regions rather than tropical zones. The genus contains both free-feeding larvae that consume plant foliage externally and gall-inducing species whose larvae develop entirely within plant galls. Gall-forming females inject a stimulant during oviposition that initiates gall growth before eggs hatch, a distinctive mechanism among gall insects. Taxonomic revision in 2014 consolidated several former genera (Eupontania, Phyllocolpa, Pontania, Tubpontania) into Euura based on phylogenetic evidence. The genus exhibits substantial genetic complexity, with frequent mito-nuclear discordance and multiple functional COI variants within individuals complicating species identification.
Euura alaskensis
Yellowheaded Spruce Sawfly
Euura alaskensis is a species of sawfly in the family Tenthredinidae, commonly known as the Yellowheaded Spruce Sawfly. It is native to northern North America and has been recorded from multiple Canadian provinces. As a member of the genus Euura, it likely develops on willow or poplar hosts, though specific host associations for this species require verification.
Euura appalachia
Euura appalachia is a species of sawfly in the family Tenthredinidae, subfamily Nematinae. The species name suggests an association with the Appalachian region of eastern North America. As a member of the genus Euura, it belongs to a group commonly known as willow sawflies, many of which are specialized feeders on willow species (Salix). Specific biological details for E. appalachia remain poorly documented in available literature.
Euura poecilonota
Marbled Birch Nematine
Euura poecilonota is a species of sawfly in the family Tenthredinidae, commonly known as the Marbled Birch Nematine. It belongs to the large and diverse genus Euura, which comprises numerous species associated with willows and other woody plants. The species was originally described by Zaddach in 1876 under the name Nematus poecilonotus. Like other nematine sawflies, this species is likely associated with birch (Betula) as a host plant, though specific biological details remain poorly documented in available literature.
Euura robusta
Euura robusta is a species of sawfly in the family Tenthredinidae, subfamily Nematinae. Sawflies in this genus are typically associated with willow (Salix) species, on which larvae feed and induce gall formation. The genus Euura contains numerous species that are morphologically similar and often require specialist examination for accurate identification. As with other Nematinae, this species lacks the narrow waist characteristic of wasps and bees, instead showing a broad connection between thorax and abdomen.
Euura tibialis
Locust Sawfly, False Acacia Sawfly
Euura tibialis is a nematine sawfly in the family Tenthredinidae, commonly known as the locust sawfly or false acacia sawfly. The species is associated with false acacia (Robinia pseudoacacia) as its host plant and has been recorded from Korea, Canada, and parts of Europe including Denmark, Norway, and Sweden. It is one of numerous Euura species that specialize on particular host plants in the genus Robinia and related legumes.
Nematus abbotii
Nematus abbotii is a species of sawfly in the family Tenthredinidae, first described by William Kirby in 1882. It belongs to the subfamily Nematinae, a diverse group of herbivorous sawflies associated with various woody and herbaceous plants. The species has been documented in Canada, particularly Ontario, with limited observational records available.
Nematus erythrogaster
Nematus cf. erythrogaster is a tentative identification for a sawfly in the genus Nematus, distinguished by its reddish-orange abdominal coloration. The 'cf.' designation indicates morphological similarity to N. erythrogaster without confirmed species-level identification. Sawflies in this genus are herbivorous and often associated with willow (Salix) or poplar (Populus) host plants. The genus Nematus is widespread in the Holarctic region, with numerous species exhibiting similar color patterns that complicate field identification.
Nematus laticulus
Nematus laticulus is a species of sawfly in the family Tenthredinidae, subfamily Nematinae. It is a small, slender sawfly associated with willow (Salix) hosts. The species was described by Villaret in 1832 and is part of a large genus of primarily Holarctic distribution. Adults are active in spring and early summer.
Pristiphora appendiculata
Small Gooseberry Sawyer
Pristiphora appendiculata is a sawfly in the family Tenthredinidae, commonly known as the Small Gooseberry Sawyer. The species is native to Europe and has been introduced to North America, where it is now established across much of Canada and the northern United States. As a member of the subfamily Nematinae, it belongs to a group of sawflies often associated with feeding on woody plants in the order Rosales. The specific epithet 'appendiculata' refers to small appendages, likely describing a morphological feature of the species.
Pristiphora banksi
Pristiphora banksi is a species of sawfly in the family Tenthredinidae, subfamily Nematinae. As a member of the genus Pristiphora, it belongs to a diverse group of sawflies commonly associated with various tree and shrub hosts. The species is documented in entomological records but specific biological details remain limited in available literature. Sawflies in this genus are typically herbivorous, with larvae feeding on leaves of their host plants.
Pristiphora serrula
Pristiphora serrula is a species of sawfly in the family Tenthredinidae, subfamily Nematinae. As a member of the genus Pristiphora, it belongs to a group of sawflies commonly associated with feeding on various woody plants. The genus Pristiphora includes numerous species that are significant defoliators of trees and shrubs, with larvae typically feeding externally on leaves. Specific biological details for P. serrula are limited in the available literature.