Parasadoletus exsertus, Malipatil, 2020

Malipatil, M. B., 2020, Parasadoletus exsertus, a new genus and species of Heterogastridae from Australia (Hemiptera: Heteroptera: Lygaeoidea), Zootaxa 4878 (3), pp. 595-600 : 598-600

Parasadoletus exsertus sp. nov.

( Figs. 1–5, 8–12 )

Type specimens: Holotype female, AUSTRALIA, Queensland, “SEQ 27.19S, 152.45E, Basset site, Mt Glorious 700m, xii.1985, Y. Basset, Argyrodendron actinophyllum 6091” . Paratype female, same data as holotype except i.1987, dissected. Both specimens are deposited in Queensland Museum, Brisbane .

Description. (Measurements are of holotype, followed by those of paratype, when different from the former, in parentheses.) Colour. Body above and below generally dark brown to black with following areas pale: posterolateral corners of pronotum; trochanters, bases and apices of femora, apical areas of tibiae and tarsi; posterolateral corner of metapleura, and connexival areas of abdominal sterna V and VI light testaceous; broad apical area of first, bases of second, third and fourth antennal segments, and basal almost half of corium pale ( Figs. 1–4 ).

Body moderately shiny above ( Fig. 1 ); length including wings 4.04 (4.15); maximum width across abdomen 1.38 (1.60).

Head. Punctures near base of head dorsally smaller than those elsewhere on head; head length 0.69 (0.65); width across eyes 0.96 (1.01); interocular space 0.64; interocellar space 0.29 (0.30); eye-ocellar space 0.11 (0.10); eye length 0.27; eye width 0.18. Lengths of antennal segments: 0.25 (0.27), 0.41 (0.52), 0.40 (0.42), 0.50 (0.55). Lengths of labial segments: 0.41 (0.50), 0.48 (0.45), 0.41 (0.39), 0.32 (0.34). Length of labrum 0.13.

Thorax. Median length of pronotum 0.82 (1.00); width at anterior margin 0.72 (0.73); width at posterior margin 1.21 (1.20). Length of scutellum 0.69 (0.57), width 0.62 (0.60). Legs with fore tibia shorter than femur, mid and hind tibiae subequal to respective femora, all femora shiny. Length of hemelytra 2.53 (2.50); length of corium 1.67 (1.61); length of claval commissure 0.23 (0.20); width of membrane 0.92 (0.90).

Abdomen. Suture between sternites IV–V and V–VI with fine conjunctiva particularly distinct in middle; sternite VII lighter in colour compared to other sternites, inner margin of each medially divided flap slightly overlapping in middle and sparsely punctate ( Fig. 8 ). Other details as in generic description.

Female genitalia. Ovipositor extending beyond medially bilobed sternite VII by about one third of its median length, as a strongly sclerotized and exposed process that is slightly curved towards left of the body ( Fig. 5 ), detailed structure as in Figs. 10 and 11 . Spermatheca ( Fig. 12 ) with a lightly pigmented ovate bulb, a narrow unpigmented “neck-like” part near base of bulb, followed by a long narrow tubular compactly coiled duct.

Etymology. The specific epithet is the Latin adjective exsertus , - a, -um, alluding to the protruded or stretched out ovipositor beyond sternite VII ( Fig. 5 ).

Notes. The specimens were collected in a flight interception trap positioned at mid-level in the heart of the canopy crowns, at about 25 m above forest floor, of the rainforest tree Argyrodendron actinophyllum (Malvaceae) ( Basset 1988).

Distribution. Australia, only south-eastern Queensland.

Figures

FIGURES 1–4. Parasadoletus exsertus sp. nov.: 1–3, holotype female, habitus dorsal, ventral and lateral views of body. 4, paratype female, head and thorax, lateral view. Abbreviation: op, ostiolar peritreme.

FIGURES 5–8. 5, Parasadoletus exsertus sp. nov. paratype female, posterior part of abdomen, ventral view. 6, 7, Sadoletus variabilis Gao & Malipatil, female body, ventral view, and 7, posterior part of female abdomen, ventral view, median flaps arrowed. 8, Parasadoletus exsertus sp. nov. paratype female, posterior part of abdomen, ventral view, median flaps arrowed. Abbreviation: ov, ovipositor.

FIGURES 9–12. Parasadoletus exsertus sp. nov. paratype female: 9, abdominal tergum. 10, 11, ovipositor. 12, spermatheca. Abbreviations: b, bulb; d, duct; Ga, gonangulum; 1Gpo, 2Gpo, first and second gonapophysis; 1Gx, 2Gx, first and second gonocoxa; pt VIII, paratergite VIII; 1r, 2r, first and second ramus; sp 8, spiracle.