Ceratulus

Taxonomy

Family: Tenthredinidae
Family common name: common sawflies
Subfamily: Blennocampinae
Tribe: Phymatocerini
Genus: Ceratulus MacGillivray, 1908
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 subfamily Blennocampinae have a diverse set of life histories and habits. Many species are restricted to subtropical and tropical regions, but the genus is still fairly species-rich in North America. Blennocampinae includes many sawflies that feed on ornamental and forestry crops. This subfamily can be recognized by wing venation and bidentate mandibles (Smith 1969d).

Ceratulus is monotypic. Ceratulus spectabilis is relatively large for its subfamily, about 7–9 mm in length, and entirely orange with black striping on the legs, darkened wings, and distinctly serrate antennae (MacGillivray 1908, Smith 1969d).

Diversity

There is a single described extant species worldwide, and it occurs in North America (Taeger et al. 2018).

Diagnostic characteristics

Subfamily characters

Genus characters

May be confused with

Ceratulus spectabilis can be distinguished from other genera in the subfamily Blennocampinae by the distinctively serrate antennae and restricted range (Smith 1969d).

Exotic pest species of concern

none

Host associations

Ceratulus spectabilis feeds on Cissus trifoliata (sorrelvine) (Smith 1969d).

Life history

unknown

Distribution

World: This genus is found only in North America (Taeger et al. 2010).

North America: Ceratulus spectabilis is known only from Texas (Smith 1969d).

Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Ceratulus

Details about data used for maps can be found here.

Ceratulus spectabilis female lateral habitus; photo by J. Orr, WSDA

Ceratulus spectabilis female lateral habitus; photo by J. Orr, WSDA

Ceratulus spectabilis female dorsal habitus; photo by J. Orr, WSDA

Ceratulus spectabilis female dorsal habitus; photo by J. Orr, WSDA

Ceratulus spectabilis female face; photo by Q. Baine, WSDA

Ceratulus spectabilis female face; photo by Q. Baine, WSDA

Ceratulus spectabilis fore wing; photo by J. Orr, WSDA

Ceratulus spectabilis fore wing; photo by J. Orr, WSDA