01296nas a2200133   4500008004100000245011400041210006900155300001100224490000700235520077100242100001501013700001601028856011801044       1998                        eng d00aDescription of the larval stages of Heterosternuta diversicornis (Sharp) Coleoptera: Dytiscidae, Hydroporinae0 aDescription of the larval stages of Heterosternuta diversicornis  a39 -460 v293 aDescription of structures of all three larval instars of Heterosternuta diversicornis (Sharp) is presented. The chaetotaxy and porotaxy of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi are discussed in detail. A close similarity between larvae of H. diversicornis, H. wickhami Zaitzev and H. cocheconis (Fall) is confirmed. All three species distinguish from the closely related species of the genus Neoporus Guignot by (i) a very short and constricted siphon, (ii) the primary setae FE8 and FE9 which are subequal in length to the maximum width of the metafemur (first instar), (iii) the absence of natatory setae on all tibiae and tarsi, and (iv) the contiguous position of the primary setae UR2 and UR3 on the urogomphomere 1.1 aAlarie, Y.1 aFritz, K.M.  uhttp://knz.lternet.edu/content/description-larval-stages-heterosternuta-diversicornis-sharp-coleoptera-dytiscidae