Guide riffle invertebrates Australian Wet Tropics streams

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8. Hemiptera (true bugs) (based on Williams 1980) 1. Claws (at least on first pair of legs) inserted before tip of last tarsal segment (see 2b, c)................................2 − Claws inserted at tip of tarsal segments ...........................................................................................................3 2. Femoral segment of posterior pair of legs extending well beyond tip of abdomen; beak 4-jointed; body usually longer than 5 mm .................................................................................... water striders, Gerridae (2a) − Femoral segment of posterior pair of legs not extending well beyond tip of abdomen; beak 3-jointed; body usually shorter than 5 mm ......................................................................................................... Veliidae (2b,c) 2a. Gerridae 2b. Veliidae: Microvelia sp. 2c. Veliidae: Rhagovelia sp. tarsus claw inserted before tip of last tarsal segment 3. Antennae hidden, forelegs much shorter than other legs and with spatulate or blade-like tarsi; mouthparts triangular, not beak-like; swims with dorsal surface uppermost .......... lesser water boat-men, Corixidae (3a) − Antennae clearly visible, length and form of forelegs similar to other two pairs of legs; mouthparts a 3- jointed beak .................................................................................................. velvet water-bugs, Hebridae (3b) 3a. Corixidae: ventral view 3b. Hebridae: ventral view 3-jointed beak - 16 -
9. Larval Megaloptera (alderflies) (based on CSIRO 1991) 1. Pair of long unbranched segmented gill filaments on abdominal segments 1-7; each filament with many long setae; with single long caudal filament ........................................................................................ Sialidae (1a) − Pair of long unbranched segmented gill filaments on abdominal segments 1-8; each filament with a few short setae; segment 10 with pair of large prolegs, each with a lateral filament and two large claws ................ ………………………………………………………………………………………………Corydalidae (1b) 1a. Sialidae 1b. Corydalidae caudal filament gill filaments gill filaments prolegs Corydalidae - 17 -
Page 1 and 2: Guide to the riffle invertebrates o
Page 3 and 4: Contents Introduction .............
Page 5 and 6: Acknowledgments We thank those expe
Page 7 and 8: 8. Body soft and worm-like with num
Page 9 and 10: 3. Crustacea (shrimps etc.) (based
Page 11 and 12: 6. Mouthparts long and slender ....
Page 13 and 14: 5. Larval Odonata (damselflies and
Page 15 and 16: 6. Larval Plecoptera (stoneflies) (
Page 17: 4. Head prognathous; tail filaments
Page 21 and 22: 4. Labrum membranous; frontoclypeus
Page 23 and 24: 12. Middle leg with tibia and tarsu
Page 25 and 26: 11. Larval Diptera (true flies) (ba
Page 27 and 28: 12. Head capsule with some scleroti
Page 29 and 30: 3. Eyes completely divided into dis
Page 31 and 32: 12B. Larval Beetles 1. Antennae lon
Page 33 and 34: 9. Tenth abdominal segment with cur
Page 35 and 36: labral fans labrum macroinvertebrat
Page 37 and 38: REFERENCES CITED Cranston PS (1995)
Page 39 and 40: Clayton P and Pearson RG (2016). Ha
Page 41: Rosser Z and Pearson RG (1995). Res

Guide riffle invertebrates Australian Wet Tropics streams

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