Key to Larvae of Mayflies (Ephemeroptera) 1 Gills under covers (except small 1st gill) (fig. 1)— CAENIDAE. CAENIDAE (2 genera). Brachycercus harrisella (fig. 2.) is separated from genus . Caenis (5 spp.) by the presence of 3 tubercles on anterior-dorsal part of head and 5 backward-curved processes on the sides of the abdomen under the gill ...
Mayfly larvae are found in a variety of locations including lakes, wetlands, streams, and rivers, but they are most common and diverse in lotic habitats. They are common and abundant in stream riffles and pools, at lake margins and in some cases lake bottoms. All mayfly larvae are aquatic with terrestrial adults.
Short Key To Mayfly Genera - Fisher Monk
2004年6月11日 · This simple key permits the easy identification of mayfly nymphs and adults down to the genus level. Identification of the exact species is more difficult, often requiring the use of a microscope. To use this key simply start at the …
Mayfly family key continued Lamellate (plate-like) gills on abdominal segments 3 or 4 to segment 7? – Ephemerellidae, very common mayfly Plate-like gills on 2 to 5 or 6; those on segment 2 are operculate? - Tricorythidae Â9. Does your specimen lack gills (or are very vestigal) on abdominal segment 1 and possibly 2 and/or 3? Mayfly family key ...
Designing Dichotomous Keys for Accurate Species Identification
2024年10月10日 · Learn how to design effective dichotomous keys for precise species identification using descriptive terminology and habitat indicators. Accurate species identification is essential for understanding biodiversity, conducting ecological research, and implementing conservation efforts.
Key C: Arthropods with More Than Six Legs. Orders important for Caterpillars Count! are highlighted in RED! Tips: Only adult arthropods are included, and certain uncommon orders are not included. To use a key, read both descriptions in a couplet (for instance, 1a and 1b).
Accordingly, we have developed a dichotomous key that both precollege and university instructors and students can use efficiently to correctly identify 18 taxonomic orders of insects. Our key was developed to target insects most commonly encountered throughout the coastal southeastern United States, but it can easily be adapted to other regions.
The North American species of the genus Caenis are revised, and illustrated keys to larvae and adults presented. Eleven nominal species, including one new species, are recognized.
A revision of the genus Caenis in North America (Ephemeroptera: Caenidae)
The North American species of the genus Caenis are revised, and illustrated keys to larvae and adults presented. Eleven nominal species, including one new species, are recognized.
Ephemeroptera (Figure 4) 7b. Thorax only with gills, never on sides of abdomen; look for feathery or “leaf-like” gills under the “armpits” tip of abdomen with two ‘tails’; ranges in size from 5 to 70mm, not including antennae or tails (stoneflies) .....Plecoptera (Figure 5)