Philonthus decorus (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 : 60-63

Philonthus decorus (Gravenhorst)

( Figs 16–18 , 36–40 , 50–51, 57, 67)

Body length: 6.60–8.00 mm (mean 7.40 mm), female 6.60–7.98 mm (mean 7.50 mm), male 6.90–7.40 mm (mean 7.20 mm); body width: 3.25–3.74 mm (mean 3.4 mm); female 3.25–3.74 mm (mean 3.4 mm); male 3.25–3.36 mm (mean 3.31 mm); head width: 1.77–1.95 mm (mean 1.85 mm), female 1.80–1.95 mm (mean 1.89 mm), female 1.77–1.89 mm (mean 1.82 mm); pronotum width: 2.08–2.21 mm (mean 2.14 mm), female 2.13–2.5 mm (mean 2.32 mm), male 2.08–2.21 mm (male 2.20 mm), about as broad as long; body stocky and strongly sclerotized. Head 1.1 x as long as wide ( Figs 16, 17 ). Antennae distinctly protruding beyond middle of elytra ( Fig. 17 ). Anterior margin of pronotum with 15–23 projections (females–9/8, 9/7, 10/9, 12/11, 9/9, 9/10, 9/9, 10/10, 9/10, 10/10, male–8/ 8, 10/9, 10/8, 11/9, 8/7, 9/10 projections on sides in individuals). Wings reaching the posterior margin of 1st (morphologically 3rd) clearly visible abdominal segment ( Figs 16, 17 ). Each fore, middle, and hind tibiae with 5, 9, and 5 protuberances respectively. Tarsi of hind legs reaching to, or slightly protruding beyond, posterior margin of 4th (morphologically 6th) clearly visible, abdominal segment ( Figs 16, 17 ). Abdominal segments II and III almost equal in width, then abdomen gradually narrowed to the terminal segment of the body ( Fig. 18 ). Abdominal segments III–VIII each with a pair of setiform projections (6 pairs in total) on sides ( Figs 16–18 ). Segments III–VI with short, straight projection, segments more than 4 (4.1–4.3) x longer than projections ( Fig. 37 ); segment VII with long, slightly curved projections, segment about 1.3 x as long as projections ( Fig. 36 ); segment VIII with longest, moderately curved projections, almost as long as segment ( Fig. 39 ). All abdominal projections on sides bearing cuticular processes ( Figs 38, 40 ). Abdominal segments with microstructure as in Fig. 39 A. Female pupa with two ventral prolongations (Fig. 50); each prolongation with tiny denticle inside near apex (Fig. 50A); terminal prolongation with tiny numerous cuticular processes in apical region (Fig. 50B). The first pair of functional spiracles relatively small, similar to second, moderately elongated, without microstructure ( Figs 17, 18 , 57 ); atrophied spiracles as in Fig. 67 .

FIGURES 41–51. Pupa of Bisnius fimentarius (41, 41A, B, 42), Gabrius osseticus (43, 43A, B, 44, 44A), Philonthus atratus (45, 45A, 46), P. carbonarius (47, 47A, 48, 48A), P. debilis (49, 49A, B) and P. decorus (50, 50A, B, 51). (41, 43, 44, 45, 47, 49, 50) Terminal sternite of female pupa; (42, 46, 48, 51) gonotheca or entire terminal sternite (48) of male pupa; (41A, 43A, 44A, 45A, 47A, 48A, 50A) ventral prolongations; (41B, 43B, 48A, 49B, 50B) terminal prolongation.

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 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.