Suborder - Anisoptera

Taxonomic Hierarchy for Freshwater Invertebrate Collection


Results

33 results for "Anisoptera"

Aeshna eremita

Freshwater Invertebrate Collection

Common NameLake Darner SeasonalityJune to September in British Columbia (Paulson, 2009). IdentificationBlue or green notched stripes on lateral sides of thorax (Figure 2). Very similar in appearance to Canada Darners (A. canadensis) but different by having a larger size,a notched posterior thoracic stripe, and a black horizontal line bisecting the frons. They are easily differentiated from other congeneric species by their large sizes and their thoracic stripe pattern(Paulson, 2009).

Aeshna interrupta

Freshwater Invertebrate Collection

Common NameVariable Darner SeasonalityJune to October in British Columbia (Paulson, 2009). IdentificationHalf blue and half yellow stripes on lateral sides of thorax narrow or broken into spots as the scientific name suggests (see lateral image).Most other congeneric species (e.g. A. eremita and A. juncea) have more prominent and unbroken thoracic stripes (Paulson, 2009).

Aeshna juncea

Freshwater Invertebrate Collection

Common NameRush Darner SeasonalityJune to September in British Columbia (Paulson, 2009). IdentificationBlue and yellow stripes on lateral sides thorax are straight and broad (Figure 2). Similar in appearance to Subarctic Darners(A. subarctica) but differnt by having straight thoracic stripes (instead of slightly notched). Also somewhat similar to Variable Darners (A. interrupta) but different by having broader thoracic stripes. They are easily differentiated from other congeneric species by their thoracic stripe pattern (Paulson, 2009).

Aeshna sitchensis

Freshwater Invertebrate Collection

Aeshna sp.

Freshwater Invertebrate Collection

Aeshna umbrosa

Freshwater Invertebrate Collection

Anax sp.

Freshwater Invertebrate Collection

Cordulia shurtleffi

Freshwater Invertebrate Collection

Cordulia sp.

Freshwater Invertebrate Collection

Epitheca sp.

Freshwater Invertebrate Collection

Gomphus notatus

Freshwater Invertebrate Collection

Gomphus sp.

Freshwater Invertebrate Collection

Leucorrhinia hudsonica

Freshwater Invertebrate Collection

Common NameHudsonian Whiteface SeasonalityMay to August. IdentificationThe Hudsonian Whiteface has a length of 27 to 30 mm. Male dragonflies are black and marked with red on the thorax and the abdomen with pointed spots on one end that form a line in the top side of the abdomen. The female is a dark brownish color and marked similarly to the male except the markings are yellow instead of black. Both sexes have creamy white faces. The naiad of the Hudsonian Whiteface has a length of 16 to 18 mm. Its abdomen is rounded, which gives it a short, stocky appearance known as the sprawler form. Naiads are brown with three dark stripes marking the length below the abdomen. In some cases, there are tiny hooks on abdominal segments three through six. Every side of abdominal segments eight and nine has a spine that points out away from the abdomen.

Leucorrhinia intacta

Freshwater Invertebrate Collection

Common NameDot-tailed Whiteface SeasonalitySpring through summer. IdentificationMales have white faces and a single yellow dorsal dot on the 7th segment of the abdomen. The immature has a yellow marking on the thorax. The female has yellow markings on the abdomen with the same prominent, square dorsal spot on the 7th segment, which is often truncated into a trapezoid. The body varies from 1.1 to 1.3 inches in length. Larvae possess conspicuous epi-cranial protuberances on the frons or vertex.

Leucorrhinia proxima

Freshwater Invertebrate Collection

Leucorrhinia sp.

Freshwater Invertebrate Collection

Libellula quadrimaculata

Freshwater Invertebrate Collection

Libellula sp.

Freshwater Invertebrate Collection

Neurocordulia sp.

Freshwater Invertebrate Collection

Ophiogomphus colubrinus

Freshwater Invertebrate Collection

Common NameBoreal Snaketail SeasonalityFlying from early May to late August or early September (Needham et. al., 1955). IdentificationColoration is dominantly green on the head, eyes and thorax, with a black outline around the labrum and facial sutures as well as black lateral stripes on thorax. Eyes do not meet dorsally on the head. The anterior thoracic strip is divided by a narrow green line seen in many other Ophiogomphus species. Legs are entirely black, except for trace green markings on the femora and tibia of females. The abdomen is primarily black with interrupted dorsal and lateral stripes that appear bright yellow and noticeably widen on enlarged segments 7, 8 and 9 and continue on to the caudal appendages of males. Length of the abdomen can vary up to 10mm between individuals. Unlike most other species, male boreal snaketails have small dark coloured horns on their head similar to females; however, females of this species have two pairs of horns, one in front and one behind the eye (Needham et. al. 2000).

Ophiogomphus severus

Freshwater Invertebrate Collection

Common NamePale Snaketail SeasonalityAdults have a flight season occurring from May to September. IdentificationColoration of Ophiogomphus severus is similar to its close relatives, except that O. severus has a larger proportion of black across the entire body. The head and eyes are yellow with a black line across the frons and a black vertex. Eyes do not meet dorsally. Thorax is more greenish yellow than the head and abdomen with a diagnostic dark brown oval on the prothorax. Both the forewings and the hindwings have a yellow costal vein, but dark venation color throughout the rest of the wing. Leg segments show a mottled color pattern, the leg base yellow, the tarsi black and the femur and tibia displaying both colours. Abdomen is primarily yellow and black. Lateral stripes are continuous from the first to the terminal abdominal segment while the dorsal stripe is arranged as a row of large yellow spots ending on the ninth segment. Caudal appendages are also entirely yellow. Males and females of this species look very similar, but can be differentiated by more color on the legs of the female (Needham, et al 2000).

This species is divided into two subspecies: Ophiogomphus severus severus Hagen (described above) and Ophiogomphus severus montanus Selys which is described as having a larger lateral brown spot on the prothoracic segment and more black on segment 10 of the abdomen (Needham, et. al. 2000).

Taxonomic Hierarchy for Freshwater Invertebrate Collection