Notes on the morphology and ecology of the adult females of Nesippus species (Siphonostomatoida: Pandaridae) with a key for identification Author Dippenaar, Susan M. Author Jordaan, Bea P. text Zootaxa 2012 3170 18 30 journal article 45598 10.5281/zenodo.279817 a38f02ea-b6c3-424d-beea-7c534bbac30b 1175-5326 279817 Nesippus nana Cressey, 1970 Material examined. Two adult Ƥ from the gill arches of Carcharhinus plumbeus (Nardo, 1827) caught off Richards Bay during February 2004 . Supplementary description of adult female. Mostly as described by Cressey (1970) with the following modifications or details: Caudal rami ( Fig. 9 A) bearing 5 obvious setae, all equally finely pinnate, 6th distomedial seta not observed. Adhesion pads ( Fig. 9 C) anterolaterally on dorsal shield obvious and conically shaped, adhesion pads at base of antenna smaller and less obvious with post-oral adhesion pads very pronounced boxing glove-like structures. Antenna ( Fig. 9 D) with 2 setae on terminal segment (one at base of claw, see Cressey 1970 , Fig. 43) and one about midway on segment. Mandible ( Fig. 9 B) with 10 teeth. Leg 1 exopod with spines on outer margins of both segments without ‘accessory spinule’ (see Cressey 1970 ) but rather consisting of an inner spine surrounded by flesh with tip uncovered (similar to those of N . crypturus , see Fig. 4 D, but more covered and thus less sharp and pointy). Leg 4 ( Fig. 9 E) exopod with fine setules on medial margin, terminal spines (1 slightly more distolateral than others) of almost equal lengths (outer 2 slightly longer) with serrated margins and endopod with fine setules on distomedial margin. FIGURE 8. Nesippus tigris Cressey, 1967 , adult female SEM micrographs. (A) Cephalothorax, ventral; (B) Maxilla, calamus; (C) Leg 1; (D) Leg 3, last exopod segment and Leg 4. Scale bars: A, 200 µm; B–D, 20 µm. Distinguishing characteristics. Fourth thoracic segment without lateral expansions, genital complex with anterolateral corners slightly tapering into narrow neck-like anterior region with shallow and broad median sinus posteriorly (see Cressey 1970 , Fig. 39), prominent boxing glove-like post-oral adhesion pads ( Fig. 9 C), cephalon border bearing conspicuous papillae with short setules ( Fig. 9 F) and caudal rami with very finely (almost invisible) pinnate setae ( Fig. 9 A). Ecological aspects. Nesippus nana exhibits a prevalence of 25% on its host with mean intensity and mean abundance of 2 and 1 individuals per host respectively. This is the first report of N . nana from the east coast of South Africa .