Revision of the genus Pollanisus Walker, 1854 (Lepidoptera: Zygaenidae: Procridinae) Author Mollet, Bernard 0000-0002-1913-4485 molletb@wanadoo.fr Author Tarmann, Gerhard M. 0000-0002-1913-4485 molletb@wanadoo.fr text Zootaxa 2023 2023-05-09 5281 1 1 72 http://dx.doi.org/10.11646/zootaxa.5281.1.1 journal article 54694 10.11646/zootaxa.5281.1.1 018aa9c3-6cd4-4fb5-a5c1-6825acc73a26 1175-5326 7912043 6ABDFD26-7900-41EA-91AD-8CA3B8552F40 Pollanisus nielseni Published data ( Tarmann 2004 ). Material examined ( Table 14 ), all from Western Australia . 1 ♁ (1531) ( Figs 196, 197 ), 7 ♁, N. Lancelin , Wedge Island , 30°49′04.2″S , 115°14′15.6″E , 80 m , 10/ 11.IX.2010 , S. & B. Mollet leg. ( BMC ) . Discussion and differential diagnosis. See the above comparison with Pollanisus cupreus , P. amethystina and P. empyrea . Phenology and bionomics. Pollanisus nielseni ( Figs 204, 205 ) is only active in sunny weather or when it is disturbed. P. nielseni occurs in scattered localities ( Tarmann 2004 ).At Wedge Island ( Fig. 203 ), its type locality, the habitat is a forest of low bushes close to coastal sand dunes. However in this habitat P. nielseni and P. cupreus are syntopic and synchronous. The assumed larval host plant is Hibbertia spicata ( Tarmann 2004 ) . From collected females, rearing was possible on H. spicata and H. subvaginata . Eggs are light cream to yellowish. During rearing the larvae could be moved easily from H. spicata to H. subvaginata and reciprocally. The larvae ( Fig. 201 ) are of variable appearance at the last instar and cannot be distinguished from those of P. cupreus (B. Mollet rearing observation). Larvae in the last instar show a character not described so far. It is a group of four sclerotized circular dots on the dorsal part of the first thoracic segment ( Fig. 202 ), two on each side of the medial line. These dots were also observed on the available larvae of Pollanisus commoni , P. incertus , P. jirrbal sp. n. , P.cupreus and P. amethystina . The position and the size of these dots needs more study to know if they are of taxonomic importance. A similar arrangement is also visible on the last instarlarva of Myrtartona rufiventris (Walker, 1854) (B. Mollet observation). FIGURES 193–197 . Pollanisus species , upper side and frontal view. 193-195. P. cupreus . 193, 194. Lancelin; 195. Male nectaring. P. nielseni . 196, 197. Wedge Island. (scale bars: 1 mm).

deposited	qty	species ‒ localities	cd/cb	max-min	cd/ch	max-min	host plant observed
All from Western Australia
BMC	8	Pollanisus cupreus Lancelin ,	1.64	1.76-1.44	1.09	1.14-1.01	unknown
BMC	8	Pollanisus nielseni Wedge Island	1.66	1.84-1.47	1.07	1.18-0.94	unknown

TABLE 14 . Head ratio data. Pollanisus cupreus . P. nielseni . FIGURES 198–199 . Pollanisus cupreus . 198. Habitat at Lancelin. 199. Female resting on a Fabaceae sp. flower. FIGURE 200 . Pollanisus cupreus . Last instar larva. FIGURES 201–202 . Pollanisus nielseni . 201. Last instar larva. 202. Two pairs of sclerotized circular dots on the first thoracic segment. FIGURES 203–205 . Pollanisus nielseni . 203. Habitat at Wedge Island near Lancelin. 204. Female resting on a Hibbertia sp .. 205. Male. Distribution map ( Fig. 206 )