Stromboceridea

Taxonomy

Family: Tenthredinidae
Family common name: common sawflies
Subfamily: Selandriinae
Tribe: Aneugmenini
Genus: Stromboceridea Rohwer, 1911
Subgenera: none

Background

The Tenthredinidae are the most species-rich family and are found throughout the world, in all continents but Antarctica. They are known as the common sawflies. They can generally be recognized by a cylindrical body and long, segmented antennae. Otherwise, they come in a variety of colors, sizes, and forms (Goulet 1992).

Sawflies in the Selandriinae subfamily are relatively small and slender. The range of Selandriinae is worldwide; it occurs on all continents except Antarctica (Goulet 1992). It is the most common and diverse group of tenthredinids in tropical regions, particularly in Central America, South America, and Southeast Asia (Smith 1969e). Selandriinae contains the only known sawflies that feed on non-vascular plants, specifically ferns (Smith et al. 2013). The subfamily can be distinguished from other subfamilies by wing venation (Goulet 1992).

Stromboceridea is monotypic in the Nearctic region. Stromboceridea nigricans is a southwestern species about 8 mm in length and mostly black with minimal areas of white on the legs and pronotum (Smith 1969e).

Diversity

There are 17 described extant species worldwide. Fourteen species occur in North America (Smith 1995, Taeger et al. 2010).

Diagnostic characteristics

Subfamily characters

Genus characters

May be confused with

Stromboceridea can be confused with similar species in the subfamily Selandriinae or tribe Aneugmenini. It can be distinguished from most other genera by the absence of a fore wing anal crossvein, and from closely related Eustromboceros by the tarsal claw (Smith 1969e).

Exotic pest species of concern

none

Host associations

unknown

Life history

unknown

Distribution

World: This genus is known from North and South America (Taeger et al. 2010).

North America: The genus is most common in Mexico and Central America and is recorded throughout (Rohwer 1911, Smith 1971c, Smith 1995). Only S. nigricans also occurs farther north in Arizona (Smith 2016).

Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Stromboceridea and the Smithsonian National Museum of Natural History Entomology Collection (USNM)

Details about data used for maps can be found here.

Stromboceridea nigricans female lateral habitus; photo by Q. Baine, WSDA

Stromboceridea nigricans female lateral habitus; photo by Q. Baine, WSDA

Stromboceridea nigricans female dorsal habitus; photo by J. Orr, WSDA

Stromboceridea nigricans female dorsal habitus; photo by J. Orr, WSDA

Stromboceridea nigricans female face; photo by Q. Baine, WSDA

Stromboceridea nigricans female face; photo by Q. Baine, WSDA

Stromboceridea nigricans male lateral habitus; photo by J. Orr, WSDA

Stromboceridea nigricans male lateral habitus; photo by J. Orr, WSDA

Stromboceridea nigricans male dorsal habitus; photo by J. Orr, WSDA

Stromboceridea nigricans male dorsal habitus; photo by J. Orr, WSDA

Stromboceridea nigricans male face; photo by Q. Baine, WSDA

Stromboceridea nigricans male face; photo by Q. Baine, WSDA

Stromboceridea nigricans wings; photo by J. Orr, WSDA

Stromboceridea nigricans wings; photo by J. Orr, WSDA