Pselactus, Broun, 1886

Batelka, Jan, 2017, Review of Cape Verde Pselactus Broun, 1886 (Coleoptera: Curculionidae: Cossoninae) with description of a new species, larvae and notes on biology, Zootaxa 4317 (2), pp. 225-246 : 242

Key to larvae of Cape Verde Pselactus

The larva of Pselactus spadix , described by Anderson (1952), is not inlcuded in this key because some data about body chaetotaxy are missing, and therefore it would not be possible to discriminate it from the two Cape Verde species.

1. Dorsum of epicranium with 4 relatively long setae (des1–3 and des5) and 1 short (des4) ( Fig. 3 A). Frons with 5 relatively long to short setae (fs) ( Fig. 3 A). One finger-like dms on mala located close to pfs2, and not in line with 5 remaining dms ( Fig. 3 B). Abdominal segment VIII with 1 short ss; and 2 very long eps ( Fig. 4 D). Abdominal segment IX with 1 very long and 1 short ps ( Fig. 4 D). Abdominal segment X with 1 long and 2 very short to minute ts ( Fig. 4 D)................. Pselactus obesulus

- Dorsum of epicranium with 4 very long setae (des1–3 and des5) and 1 long (des4) ( Fig. 11 A). Frons with 5 long setae (fs) ( Fig. 11 A). All 6 finger-like dms on mala in one line ( Fig. 11 B). Abdominal segment VIII with 1 long ss; and 1 relatively long and 1 very long eps ( Fig. 12 C). Abdominal segment IX with 1 very long ps ( Fig. 12 C). Abdominal segment X with 1 short and 2 very short to minute ts ( Fig. 12 C).................................................... Pselactus strakai sp. nov.

Figures

FIGURE 3. Pselactus obesulus, mature larva: A — head, frontal view (des — dorsal epicranial seta, fs — frontal epicranial s., les — lateral epicranial s., at—antenna); B — maxillolabial complex consisting of left maxilla (dms — dorsal malar s., vms — ventral malar s., mpxs — maxillary palps s., mbs — basioventral s., pfs — palpiferal s., stps — stipital s.), prementum and postmentum, ventral view (prms — premental s., pms — postmental s., ligs — ligular s.); C — right mandible (mds — mandible dorsal s.), ventral view; D — antenna; E — labrum and clypeus (lms — labral s., cls — clypeal s.), dorsal view; F — epipharynx (ams — anteromedial s., als — anteriolateral s., mes — median s., lr—labral rods), ventral view.

FIGURE 4. Pselactus obesulus, mature larva: A — habitus, left lateral view; B — left lateral view of thoracic segments, C — left lateral view of abdominal segment I, D — left lateral view of abdominal segments VII-X (prns — pronotal s., prs — prodorsal s., pds — postdorsal s., as — alar s., ss — spiracular s., eps — epipleural s., ps — pleural s., pda — pedal s., lsts — laterosternal s., eus — eusternal s., ds — dorsal s., sts — sternal s., Th 1 - 3 — number of thoracic segments, Ab 1 - 10 — number of abdominal seg.).

FIGURE 11. Pselactus strakai sp. nov., mature larva: A — head, frontal view (des — dorsal epicranial seta, fs — frontal epicranial s., les — lateral epicranial s., at—antenna); B — maxillolabial complex consisting of left maxilla (dms — dorsal malar s., vms — ventral malar s., mpxs — maxillary palps s., mbs — basioventral s., pfs — palpiferal s., stps — stipital s.), prementum and postmentum, ventral view (prms — premental s., pms — postmental s., ligs — ligular s.); C — right mandible (mds — mandible dorsal s.), dorsal view; D — antenna; E — labrum and clypeus (lms — labral s., cls — clypeal s.), dorsal view; F — epipharynx (ams — anteromedial s., als — anteriolateral s., mes — median s., lr—labral rods), ventral view.

FIGURE 12. Pselactus strakai sp. nov. mature larva: A — habitus, left lateral view; B — left lateral view of thoracic segments, C — left lateral view of abdominal segment I, D — left lateral view of abdominal segments VII-X (prns — pronotal s., prs — prodorsal s., pds — postdorsal s., as — alar s., ss — spiracular s., eps — epipleural s., ps — pleural s., pda — pedal s., lsts — laterosternal s., eus — eusternal s., ds — dorsal s., sts — sternal s., Th 1 - 3 — number of thoracic segments, Ab 1 - 10 — number of abdominal seg.).