Palaeocnopus

Alekseev, Vitalii I. & Grzymala, Traci L., 2015, New Aderidae (Coleoptera: Tenebrionoidea) from Baltic and Bitterfeld amber, Zootaxa 3956 (2), pp. 239-257 : 250

Key to the Palaeocnopus species of Baltic and Bitterfeld amber

1. Pronotum with one deep and well-defined transverse sub-basal impression ( Fig. 22 A); elytra and antennomeres III–XI with visible elongate pubescence............................................................ P. saeticornis sp. nov.

- Pronotum with two distinct sub-basal impressions ( Fig. 21 A, 23A, 24A); elytra and antennomeres without elongate pubescence.............................................................................................. 2

2. Pronotum with two long transverse angulate sub-basal impressions at base ( Fig. 21 A), head and pronotum densely punctate (distance between punctures less than or equal to puncture diameter)....................... P. densipunctatus sp. nov.

- Pronotum with two pit-shaped sub-basal pronotal impressions ( Figs. 23 A, 24A), head and pronotum sparsely punctate.... 3

3. Antennomeres III–X long cylindrical; antennomere XI tear-shaped ( Fig. 23 B); sub-basal pronotal impressions closed ( Fig. 23 A)............................................................................. P. glabricornis sp. nov.

- Antennomeres III–VIII cylindrical; antennomeres IX–XI rounded, subequal in size ( Fig. 24 B); sub-basal pronotal impressions open laterally ( Fig. 24 A).................................................................. P. mara sp. nov.

Figures

FIGURES 21 – 24. Palaeocnopus spp. illustrations. 21) Palaeocnopus densipunctatus sp. nov. A. forebody, B. antenna; 22) Palaeocnopus saeticornis sp. nov. A. forebody, B. antenna; 23) Palaeocnopus glabricornis sp. nov. A. forebody, B. antenna; 24) Palaeocnopus mara sp. nov. A. forebody, B. antenna.