Anthrenocerus stigmacrophilus Armstrong

Kiselyova, Tatiana, 2008, Description of the Larval Stage ofMyrmeanthrenus frontalisArmstrong andAnthrenocerus stigmacrophilusArmstrong (Coleoptera: Dermestidae), with a Discussion of their Phylogenetic Relationships, The Coleopterists Bulletin 62 (2), pp. 333-343 : 333-343

Anthrenocerus stigmacrophilus Armstrong

Larva ( Fig. 11 ). Length 3.8–4.6 mm. Body strongly convex dorsally and flattened ventrally. Integument of head, nota, terga, and legs yellowish-brown; sterna hyaline. Head and body dorsally covered with short, brown, club-shaped spinulate setae ( Fig. 12 ). Head with 6 stemmata on each gena; frons prominently bulging ( Fig. 11 ). Pronotum strongly convex. Nota and terga laterally fringed with longer spicisetae and some simple setae, posteriorly densely fringed with club-shaped spinulate setae. Normal hastisetae absent, but short hastisetae with blunt apices present on the terga ( Fig. 13 ). Venter covered with pale spicisetae.

Antennal segment 2 about 3 times longer than segment 3; sensorium subapical, with a narrow, elongate base and conical apex ( Fig. 14 ). Labro-epipharyngeal margin with 10 setae in the outer series. Epipharynx with 12 sensory cups in the proximal transverse series; distal sensory papilla in 2 groups: the proximal group

1 This might be an artifact of clearing, since small circles similar to setal sockets are visible on one specimen.

336 of 2 and the distal of 4; epipharyngeal rods slender ( Fig. 15 ). Mandible with a short, asperate prostheca; mesal surface at the apex excavated and delimited by the rounded cutting edges dorsally and ventrally. Apex of galea with strong recurved setae ventrally ( Fig. 16 ) and slender setae dorsally ( Fig. 17 ). The apical seta in the dorsomesal series on lacinia slightly recurved ( Fig. 17 , arrow), as thick as the lacinial spur. Ligula bilobed, with 3 pairs of strong setae apically; hypopharynx with a deep median furrow and numerous scale-like asperities. Hypopharyngeal sclerome hyaline.

Setal patterns of abdominal tergum 1 as illustrated ( Fig. 18 ). Antecostal suture present on abdominal terga 1 through 8. Acrotergites with fine spicisetae, their integument sculptured with scale-like pattern. Segment 9 small, partially withdrawn into segment 8, with a crescent-shaped tergum and membranous sternum. Tergum 9 densely set with short spicisetae, except for a small median depression. Pretarsal setae of equal length ( Fig. 19 ).

Figures

Fig. 11. Anthrenocerus stigmacrophilus. Lateral habitus. Scale line 0.5 mm.

Figs. 12–17. Anthrenocerus stigmacrophilus. Figs 12, 13 scale line 0.05 mm, figs 14–17 scale line 0.1 mm. 12, club-shaped spinulate seta from abdominal tergum 8; 13, hastiseta from abdominal tergum 8; 14, Left antenna, fronto-ventral, segments 2 and 3; 15, epipharynx; 16, maxilla, ventral; 17, apex of maxilla, dorsal.

Figs. 18–19. Anthrenocerus stigmacrophilus. Scale line 0.1 mm. 18, abdominal tergum 1, right half; 19, tibia and tarsungulus of prothoracic leg, posterior view.