Philonthus debilis (Gravenhorst)

Pietrykowska-Tudruj, Ewa & Staniec, Bernard, 2011, The morphology of the pupae of six species of Philonthina (Coleoptera, Staphylinidae, Staphylinini) with taxonomic remarks, Zootaxa 2865, pp. 53-67 : 60

Philonthus debilis (Gravenhorst)

(( Figs 13–15 , 33–35 , 49–49B, 56, 60, 68–70)

Body length: 3.20–3.30 mm; body width: 1.35–1.38 mm; head width: 0.66–0.77 mm; pronotum width: 0.90–0.98 mm; 1.1 x as broad as long; body rather slender and relatively weakly sclerotized. Head almost as long as wide ( Figs 13, 14 ). Antennae reaching to middle of elytra length as in B. fimetarius ( Figs 2 , 14 ). Margin of pronotum with 8 or 10 projections (5/5, 4/4, projections on sides in individuals). Wings slightly protruding on the posterior margin of 1st (morphologically 3rd) clearly visible, abdominal segment ( Figs 13, 14 ). Each fore, middle, and hind tibiae with 4–5, 9, and 4 protuberances respectively. Tarsi of hind legs reaching or protruding the middle of 4th (morphologically 6th) clearly visible abdominal segment length ( Figs 13, 14 ). Abdominal segments II–IV almost equal in width, then narrowed to the terminal segment of the body ( Fig. 15 ). Abdominal segments III–VIII each with a pair of setiform projections (6 pairs in total) on sides ( Figs 13–15 ). Segments III–VII 1.2–1.4 x as long as projections ( Figs 13–15 ); projections of segment VIII usually curved, at least as long as segment ( Figs 33, 34 ). All abdominal projections on sides bearing sparse cuticular processes ( Fig. 35 ). Abdominal segments with microstructure as in Fig. 34 A. Female pupa with two well-developed ventral, elongated, straight prolongations (Fig. 49); ventral and terminal prolongation with tiny cuticular processes (Figs 49A, 49B). The first pair of functional spiracles distinctly narrowed apically ( Figs 56, 60 ) with reticulate microstructure; atrophied spiracles as in Figs 68–70 .

Figures

FIGURES 13 – 18. Pupa of Philonthus debilis (13 – 15) and P. decorus (16 – 18). (13, 16) Ventral aspect, (14, 17) lateral aspect, (15, 18) dorsal aspect.

FIGURES 19 – 40. Pupa of Gabrius osseticus (19, 20), Philonthus atratus (21 – 25), P. carbonarius (26 – 32), P. debilis (33 – 35) and P. decorus (36 – 40). (19, 21, 26, 27, 36) Lateral part of segment VII with microstructure (19 A, 26 A) and spine (27); (20, 22, 33, 39, 40) lateral part of segment VIII with microstructure (39 A) and spine (40); (23, 24, 28, 29) lateral part of segment IV with spine (24, 29); (25, 31, 32, 34, 35, 37, 38) lateral part of segment V with microstructure (34 A) and spine (32, 35, 38).

FIGURES 1 – 6. Pupa of Bisnius fimentarius (1 – 3) and Gabrius osseticus (4 – 6). (1, 4) Ventral aspect, (2, 5) lateral aspect, (3, 6) dorsal aspect.

FIGURES 52 – 70. Pupa of Bisnius fimentarius (52, 61, 62), Gabrius osseticus (53, 58, 63, 64), Philonthus atratus (54, 59, 65), P. carbonarius (55, 66), P. debilis (56, 60, 68 – 70) and P. d e c o r u s (57, 67). (52 – 60) The first pair of functional spiracles; (61 – 70) atrophied spiracles.