<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Dicrotendipes Kieffer 1913</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> </head> <body> <h2> <i>Dicrotendipes</i> Kieffer</h2> <p>(Figs. 37–42)</p> <p> <i>Dicrotendipes</i> is one of the few genera to have been studied adequately in the region, thanks to the work of Epler (1988). Three widely-distributed species are recognised that can be distinguished using the keys of Epler (1988) and Cranston (2000). <i>Dicrotendipes pelochloris</i> (Kieffer), whose immature stages were described as <i>Cladotendipes inferior</i> (Johannsen) by Lenz (1937), occurs in several post-tsunami impacted ponds. All larval occurrences were in recovering or minimally-impacted ponds, of conductivity 169–897 µS. <sup>cm−1</sup> and dissolved solids of 84–449 ppm.</p> <p>The immature stages of <i>D. septemmaculatus</i> (Becker) have been described by Epler (1988) and Cranston (2000). The species has been reported regionally from Lake Toba, Sumatra (Kikuchi & Sasa 1990). Larvae of <i>D. septemmaculatus</i> were found in three dilute pools (104–192 µS. <sup>cm−1</sup> conductivity, dissolved solids 92–96 ppm).</p> <p>One larva apparently conspecific with those identified as <i>D.</i> ‘ <i>sarinae</i> /K4’ from northern Australia (Cranston, 2000) was found in a moderately impacted pool recovering 18 months post-tsunami (440 µS. <sup>cm−1</sup> conductivity, dissolved solids 222 ppm).</p> <p>These three species can be distinguished as larvae as follows:</p> <p>1. Frontal apotome of dorsal head with ovoid fenestra (Fig. 37). Outermost mental teeth composite and fused (Fig. 40)................................................................................... <i>D. pelochloris</i></p> <p>– Frontal apotome of dorsal head without such ovoid fenestra (Figs. 38, 39). Outermost mental teeth separate apically (Figs. 41, 42).................................................................................. 2</p> <p>2. Frontal apotome with narrow, elongate process (Fig. 38)....................................................................... <i>D. septemmaculatus</i></p> <p>– Frontal apotome without indication of fenestra or process (Fig. 39)............................................................................... <i>D.</i> ‘K4’</p> <p> <i>Dicrotendipes</i> larvae are collector-gatherers: larvae of some species will tolerate quite high nutrient and salinity levels.</p> </body> </html>