Carvalhoma weiri, Namyatova & Cassis, 2016

Namyatova, Anna A. & Cassis, Gerasimos, 2016, Revision of the staphylinoid and ground-dwelling genus Carvalhoma Slater & Gross (Insecta: Heteroptera: Miridae: Cylapinae) of Australia, European Journal of Taxonomy 253, pp. 1-27 : 17-23

Carvalhoma weiri sp. nov.

urn:lsid:zoobank.org:act:B6582026-5F0A-495F-9586-01EDBE0BBDB6

Figs 1 , 6 , 10 , 11

Diagnosis

Recognized by the following combination of characters: head, pronotum and hemelytron shiny, hemelytron with distinct punctures; body in male mostly pale brown, antennal segment I in both sexes whitish yellow to pale brown ( Fig. 1 ); lateral side of pronotum smooth, almost without wrinkles and setae; antennal segment I long, ca 1.9–2.1× as long as width of vertex in male and ca 1.2× in female.

Etymology

The species is named after T. Weir, one of the collectors of the specimens.

Material examined

Holotype

AUSTRALIA: Ƌ, Australian Capital Territory, Blundell’s Creek , 3 km E of Piccadilly Circus, 35.55° S, 148.83333° E, 850 m, Feb. 1984, T. Weir, J.F. Lawrence and M.L. Johnson (00043340) ( ANIC).

Paratypes

AUSTRALIA: Australian Capital Territory: 1 Ƌ, same collection data as holotype (00043339) ( ANIC); 1 ♀, Wombat Creek, 6 km NE of Piccadilly Circus, 35.19° S, 148.51° E, 750 m, Jan. 1984, T. Weir, J.F. Lawrence and M.L. Johnson leg. (00043344) ( ANIC).

Description

Male

BODY LENGTH. 2.3.

COLOURATION ( Fig. 1 ). Head brown or reddish brown, clypeus, maxillary and mandibular plates yellow, pronotum and scutellum brown or reddish brown; pleura brown, with yellow metathoracic scent gland evaporative area; hemelytron yellow, brown basally and with brown punctures; antenna, labium, legs and abdomen yellow, forefemur sometimes with reddish tinge, abdomen with pale brown or brown markings.

SURFACE AND VESTITURE. Head shiny, pronotum shiny with collar shagreened, scutellum shagreened ( Fig. 1 ); pronotum smooth laterally, without wrinkles or short setae; pleura with short setae only on anterior part of metapleuron ( Fig. 6J ); setae on dorsum, appendages and abdomen almost absent.

STRUCTURE AND MEASUREMENTS. Body ca 5.0× longer than pronotum width; frons only slightly protruding anteriad ( Figs 1 , 6C ), head ca 2.0× wider than long, vertex ca 1.0–1.1× wider than eye diameter; head ca 1.0–1.1× wider than high; antennal segment I ca 1.9–2.1× longer than vertex width, segment II ca 4.5–4.9× longer than vertex width, and ca 2.3–2.4× longer than segment I; labial segments I and II subequal in length, segment III slightly shorter than segment II, and segment IV slightly shorter than segment III ( Fig. 6E ); pronotum ca 1.0–1.1× wider than long, ca 0.8–0.9× wider than head, with single oval depression medially; metepisternum with distinct ridge ( Fig. 6J ); hind femur ca 3× longer than head height; tarsal segment I almost twice as long as segment II, segments II and III subequal in length ( Fig. 6L ); pregenital segments not upraised above genital segment ( Fig. 6G ).

GENITALIA ( Fig. 10 A–E). Right paramere without ridge dorsally, its outer margin concave; apices of parameres straight, not hook-shaped; left paramere with ridge dorsally, its basal swelling rounded. Theca mostly membranous; endosoma with single sclerite, placed ventrally on the right side.

Female

BODY LENGTH. 2.7.

COLOURATION ( Fig. 1 ). Darker than in male. Head dark brown, with clypeus and mandibular plate pale brown, antennal segment I and labium yellow; pronotum and scutellum dark brown; pleura dark brown; coxae pale brown to brown, paler apically; femora pale brown, tibia and tarsi yellow; abdomen brown.

SURFACE AND VESTITURE. Similar to male, but setae on dorsum and legs distinct.

STRUCTURE AND MEASUREMENTS. Body ca 5.0–5.1× longer than pronotum width; head ca 2.3× wider than long, vertex ca 0.9× wider than eye diameter; head ca 1.2× wider than high; antennal segment I ca 2.1× longer than vertex width, segment II ca 4.9× longer than vertex width, and ca 2.3× longer than segment I; pronotum ca 1.1× wider than long, ca 0.8× wider than head; hind femur ca 2.5× longer than head height.

GENITALIA. Sclerotised ring of dorsal labiate plate elongate posteriorly, its dorsal portion very narrow, ca 4× longer than wide ( Fig. 10F ); posterior wall with small tubercules ( Fig. 10G ).

Distribution

Known only from the Australian Capital Territory ( Fig. 11 ).

Remarks

Antennal segments III and IV are broken in the males of the type material, and segments II–IV are broken in the female. In contrast to other Carvalhoma species, specimens of C. weiri sp. nov. are relatively pale, and genitalia also very soft and pale, which can indicate that the specimens are teneral.

Differential diagnosis

Carvalhoma weiri sp. nov. is most similar to C. malcolmae in the relatively large size, elongate body, surface and vestiture ( Fig. 1 ). However, C. malcolmae differs in the mostly dark brown to black male ( Fig. 1 ), the frons distinctly protruding anteriad of the eyes ( Figs 1 , 2B ), in dorsal view ca 2.1× as wide as long in male and 1.7–2.2× in female.

Figures

Fig. 1. Habitus of Carvalhoma species. Scale bar = 1 mm. When two specimens of the same species are shown, the male is on the left and the female on the right. C. ovatum sp. nov. shows the male holotype. C. taplini Slater & Gross, 1977 shows the female holotype.

Fig. 6. SEM images of C. weiri sp. nov. A. Head, anterior view, Ƌ. B. Head and pronotum, lateral view, Ƌ. C. Head and pronotum, dorsal view, Ƌ. D. Antennal segments I and II, Ƌ. E. Labium, ♀. F. Hemelytron, Ƌ. G. Abdomen, lateral view, Ƌ. H. Middle and hind femora, Ƌ. I. Hemelytron, ♀. J. Pleura, ♀. K. Fore- and middle femora, Ƌ. L. Hind tarsus, ♀.

Fig. 10. Genitalia of C. weiri sp. nov. A. Aedeagus, left lateral view. B.Aedeagus, ventral view. C. Genital capsule. D. Right paramere. E. Left paramere. F. Dorsal labiate plate of bursa copulatrix. G. Posterior wall of bursa copulatrix. Scale bars = 0.1 mm (the large scale bar is for A–B and D–E, the small scale bar is for C and F–G).

Fig. 11. Distribution of Carvalhoma species.

Fig. 2. SEM images of C. malcolmae Slater & Gross, 1977. A. Head, anterior view, ♀. B. Head and pronotum, dorsal view, Ƌ. C. Head and pronotum, lateral view, ♀. D. Fore- and middle femora, Ƌ. E. Scutellum and hemelytra, ♀. F. Antenna, ♀. G. Hind femur, ♀. H. Labium, ♀. I. Hind tarsus, ♀. J. Abdomen, lateral view, Ƌ. K. Pleura, ♀. L. Pretarsus, ventral view, Ƌ.