Pogonosternum adrianae Jeekel 1982

Pogonosternum adrianae Jeekel, 1982

Figs 5G, 7, 12–14, 26B

Pogonosternum adrianae Jeekel 1982a: 203, 205, fig. 2

Pogonosternum adrianae – Mesibov 2004: 42 (record). — Jeekel 2006: 66 (mention). — Nguyen & Sierwald 2013: 1158 (record). — Decker 2016a: 16–25 (record, mention).

Diagnosis

Differs from other Pogonosternum species in having one lighter longitudinal stripe and no median darker stripe; from P. montanum Decker, sp. nov. and P. laetificum primarly by the enlarged femoral process 1 (fp1) and 2 (fp2) and the lateral process (lp) directed laterally, but also by the presence of a subtriangular pointed process of the female leg 2 coxa; male tarsal and tibial brushes present from legpair 1 to 7; anterior spiracles obliquely ovoid with anterodorsally slightly extended rim and spiracular filter not protruding; largest known species of Pogonosternum with midbody width of 2.8–3.2 mm.

Material studied

Holotype

AUSTRALIA: 1 ♂, Victoria, Toongabbie, 18 km NNE of Traralgon, margin of Eucalyptus forest with grassland, under logs, 15 Nov. 1980, leg. C.A.W. Jeekel and A.M. Jeekel-Rijvers (NBC).

Paratypes

AUSTRALIA: 1 ♂, same data as holotype (NBC).

Other material examined

See Supplement 1 (total: 5 localities, 11 ♂♂, 11 ♀♀, 8 juv.)

Description

MEASUREMENTS. Length ca 2.6–2.8 cm; midbody width ca 2.8–3.2 mm.

COLOURATION. Colour in fresh material (Figs 12, 26B): margin of lateral edges of collum sometimes slightly lighter. Dorsum with broad median light yellowish brown stripe. On prozonites the trapezoidal paramedian light band slightly broader anteriorly, and on metazonites slightly broader posteriorly, broadest at 1/3 of length (Figs 12D, 26B). Flanks and area around ozopores slightly lighter (Fig. 12C).

STERNITES. No conspicuous sternal cones.

LEGS. Male tarsal and tibial brushes present from legpair 1 to 7, abruptly absent after. Female coxa of legpair 2 with pointed triangular process on caudal side directed distad, reaching ¾ of prefemur (Fig. 5G).

GONOPODS. Femorite (F) long and slender (Fig. 13), narrowing towards prefemorite (PF). Prolongation of femorite (prof) long, slender, S-shaped, proximal half directed posteriad and apical half directed distad. Femoral process 1 (fp1) laminate, very long, subtriangular with pointed tip, slightly curved mesally, projecting distad of lateral process (lp) and slightly distad of solenomere (S). Femoral process 2 (fp2) very long, more slender than fp1, whitish in colour, inflated, attached closely to fp1; apex of fp2 curved, not attached to fp1, margin serrulate. Lateral process (lp) on lateral side of prof, short, slender, directed distolaterally, not projecting distad of solenomere.

SPIRACLES. Anterior spiracles obliquely ovoid. Rim slightly raised and spiracular filter not protruding. Posterior spiracle ovoid with low rim, spiracular filter not protruding (Fig. 14).

Distribution

Strzelecki Ranges and central southern part of the Victorian Highlands (Fig. 7).

Remarks

A phylogenetic analysis (Decker 2016a) showed that this species is very closely related to P. laetificum with low genetic distances between populations of the two species.

We accept P. adrianae as a valid species because of its constant morphology, larger size and distinctive details of the gonopods (prof, fp1, fp2, F), spiracles, dorsal colouration and process of female second leg 2 coxa, with no intermediate features between P. adrianae and P. laetificum noted.