Dindymus (Pseudodindymus) sandakan, Stehlík, L., 2009

Stehlík, L., 2009, Pseudodindymus, a new subgenus of Dindymus (Hemiptera: Heteroptera: Pyrrhocoridae) from the Oriental Region, Zootaxa 2010, pp. 1-15 : 10-11

Dindymus (Pseudodindymus) sandakan sp. nov.

( Figs. 10, 14)

Type material. HOLOTYPE: ♂, MALAYSIA: Sabah: ‘ N. Borneo, Kudat, 17.ix.1927 ’ ( BMNH) . PARATYPES: MALAYSIA: Sabah: 1 ♂, ‘ N. Borneo, Kudat, 13.ix.1927 ’ ( BMNH) ; 1 ♀, ‘ N. Borneo, Bettotan nr. Sandakan, 6.viii.1927 ’ ( BMNH) ; 12 ♂♂ 10 ♀♀, ‘ N. Borneo, Sandakan, Baker’ ( USNM, 1 ♂ 1 ♀ in MMBC). The types from the BMNH are in a bit of poor condition, the other specimens from USNM are well preserved .

Additional material examined. INDONESIA: Kalimantan Selatan: Pulau Laut [Island], 1 ♂, J. Gribodo leg. ( USNM) .

Description. Colouration ( Fig. 14). Head, pronotum (except of anterior and posterior margins), pleura I–III shining black; in the specimens from Kudat also posterior half of epicoxal lobes I and II shining black.

Pronotal collar, a band on base of pronotal lobe (not reaching its posterolateral corners), prosternal collar, posterior pleural flange I–III yellow. In the specimens from Sandakan epicoxal lobes yellow, whereas in specimens from Kudat only anterior halves of epicoxal lobes I and II, and entire epicoxal lobes III, pale yellow. Entire pronotal epipleuron and the adjacent part of posterior pleural flange I narrowly black or blackish brown. Antennomeres 1 and 2 pale, apex of antennomere 2 blackish; antennomere 3 black; antennomere 4 whitish with ca. apical fifth blackish. Legs honey yellow, tarsomeres 2 and 3 blackish. Scutellum, clavus (except of apex), and corium up to level of dark colouration on clavus black. Remaining parts of corium in specimens from Kudat yellowish white with orange or red tinge; in specimens from Sandakan red. Membrane smoky grey, nervature concolorous. Abdominal ventrits and external genitalia red.

Punctation on pronotal lobe very prominent and rather dense so the pronotal surface scabrous. Clavus and corium, including costal margin, with distinct punctation, only in posterior part of corium punctation less prominent.

Structure. Body relativelly small. Head compared with basal width of pronotum rather large. Pronotal collar narrow; lateral pronotal margin narrow, at the level od median furrow markedly concave; pronotal lobe behind median furrow distinctly widening in male, while only slightly widening in female.

Pygophore ( Fig. 10). Ventral part of ventral wall strongly gibbous. Ventral rim medially nearly horizontal and strongly produced posteriorly, bifid; both parts of median projection concave on inner side. Ventral rim continually merging into ventral rim infolding. Lateral rim infolding dish-shaped, its inner edge strongly elevated upwards with convex spot. Processi hamati of parameres acicular, slightly raised upwards against each other, apices touching each other.

External female genitalia. Valvifer I in lateral view more strongly gibbous compared with ventrit VII; both parts of valvifer I ca. in basal half of genitalia parallel (only in a small spot at very base ajar). Inner margin of valvifer I roundly merging into dorsal margin, which is nearly horizontal; this part of valvifer I flat, somewhat depressed inwards. Tergit IX embracing short anal tube; laterotergit IX not high, with nearly horizontal furrow. Valvifer II hardly visible, medially with two small protuberances.

Measurements (mean (minimum–maximum); mm). Males (n = 7). Body length 9.09 (8.48–9.67); head: width (including eyes) 1.85 (1.78–1.94), interocular width 0.93 (0.86–0.97); lengths of antennomeres: 1 – 2.04 (1.94–2.11), 2 – 1.34 (1.24–1.43), 3 – 1.22 (1.13–1.35), 4 – 2.19 (2.00–2.90); pronotum: total length 1.79 (1.67–1.89), collar length 0.33 (0.32–0.38), callar lobe length 0.40 (0.32–0.49), pronotal lobe length 1.07 (1.03–1.13), width 2.47 (2.29–2.67); scutellum: length 1.05 (0.97–1.19), width 1.18 (1.13–1.24); corium: length 4.42 (4.05–4.91), width 1.45 (1.35–1.51).

Females (n = 6). Body length 10.90 (10.10–11.18); head: width (including eyes) 2.06 (1.97–2.11), interocular width 1.10 (1.08–1.24); lengths of antennomeres: 1 – 2.28 (2.16–2.43), 2 – 1.54 (1.48–1.57), 3 – 1.39 (1.30–1.51), 4 – 2.42 (2.32–2.54); pronotum: total length 2.05 (2.00–2.11), collar length 0.36 (0.30–0.38), callar lobe length 0.50 (0.46–0.54), pronotal lobe length 1.21 (1.13–1.30), width 2.87 (2.75–3.10); scutellum: length 1.38 (1.30–1.46), width 1.46 (1.30–1.73); corium: length 5.47 (4.86–5.67), width 1.75 (1.62–1.89).

Variability. Except the varying colouration of the epicoxal lobes and corium mentioned above, I observed also variability in the structure of the ventral rim of the pygophore. The median projections of the ventral rim could be only slightly divergent with apices of both projections rounded, or both projections are more divergent with apices less rounded.

Differential diagnosis. Dindymus (P.) sandakan differs from D. (P.) daiacus , which also has the pale band on the base of the pronotum, by its smaller size, more slender body, and colouration of antennomeres I–III, which are in D. daiacus completely black.

Etymology. Patronymic, named after Sandakan, an important city and harbour of Sabah, where part of the type series was collected. Noun in apposition.

Bionomy. Unknown.

Distribution. Malaysia (Sabah), Indonesia (Pulau Laut Island near SE Kalimantan).