Stenotus gressitti, Namyatova & Schwartz & Cassis, 2013

Namyatova, Anna A., Schwartz, Michael D. & Cassis, Gerasimos, 2013, First record of the genus Stenotus Jakovlev from Australia, with two new species, and a list of mirine species from Witchelina Nature Reserve (Insecta: Heteroptera: Miridae: Mirinae: Mirini), Journal of Natural History (J. Nat. Hist.) 47 (13 - 14), pp. 987-1008: 995-999

publication ID

http://doi.org/ 10.1080/00222933.2012.752049

publication LSID

lsid:zoobank.org:pub:54669460-8AF4-4415-A8FE-EC55CCE6F301

persistent identifier

http://treatment.plazi.org/id/FD682460-600A-FFC0-D155-FB14FA1203D7

treatment provided by

Felipe

scientific name

Stenotus gressitti
status

sp. nov.

Stenotus gressitti   sp. nov.

( Figures 1 View Figure 1 , 2A, B, E, I View Figure 2 , 3A, C, D, F–H View Figure 3 , 4A–E View Figure 4 , 6A, D View Figure 6 )

Etymology

The species was named after the late J.L. Gressitt, who collected all the specimens examined.

Material examined

Holotype. AUSTRALIA: Queensland: Archer’s Creek, Evelyn Tableland , 17.51441 ◦ S, 145.47526 ◦ E, 300 m, 10 March 1956, J. L. Gressitt, ♂ ( AMNH _ PBI 00045820 View Materials ). Deposited in the Bernice P. Bishop Museum, Honolulu, USA. GoogleMaps  

Paratypes. AUSTRALIA: Queensland: Archer’s Creek, Evelyn Tableland , 17.51441 ◦ S, 145.47526 ◦ E, 300 m, 10 March 1956, J. L GoogleMaps   . Gressitt , 2♂ (00045822, 00045824), 3♂ (00400442, 00045823, 00043883), 7♀ (00400443, 00400444, 00045837, 00045839, 00043884, 00045840, 00045838) ( BPBM). E   . Evelyn , 17.50328 ◦ S, 145.45329 ◦ E, 11 March 1956, J. L GoogleMaps   . Gressitt, 2♀ (00045833, 00045834) ( BPBM). Kuranda , 16.81722 ◦ S, 145.635 ◦ E, 200 m, 14 March 1956, J. L GoogleMaps   . Gressitt, Light Trap, ♂ (00045830) ( BPBM). Mareeba, Atherton Tablelands , 17.046 ◦ S, 145.503 ◦ E, 300 m, 10 March 1956, J. L GoogleMaps   . Gressitt , 2♂ (00045826, 00045825), 3♀ (00045835, 00045836, 00045827) ( BPBM). Tully [Tulley] Fall, 17.67771 ◦ S, 145.51832 ◦ E, 10 March 1956, J. L GoogleMaps   . Gressitt , Light Trap, 3♂ (00045829, 00043888, 00045828) ( BPBM)   .

Differential diagnosis

Stenotus gressitti   can be recognized by the mostly yellow coloration with reddish tinge, without any brown or black markings or stripes ( Figure 1 View Figure 1 ), vertex in male as long as eye diameter ( Figure 2B View Figure 2 ), frons distinctly bulging ( Figure 2E View Figure 2 ), clypeus one-half height of eye anteriorly ( Figure 2A View Figure 2 ), labium reaching middle of metasternum ( Figure 2E View Figure 2 ), ventral surface of genital capsule 1.3 times as long as dorsal surface ( Figure 4E View Figure 4 ), hook-shaped right paramere ( Figure 4B View Figure 4 ); left medial endosomal lobe distinctly longer than right medial lobe and with field of small spicules, right medial endosomal lobe without field of spicules ( Figure 4A View Figure 4 ), and posterior wall of bursa copulatrix lacking dorsal lobe ( Figure 6D View Figure 6 ). Stenotus witchelina   can be separated from S. gressitti   by body mostly yellow without reddish tinge ( Figure 1 View Figure 1 ), vertex in male shorter than eye diameter ( Figure 2C View Figure 2 ), frons almost flat in lateral view ( Figure 2F View Figure 2 ), ventral surface of genital capsule 1.7 times as long as dorsal surface ( Figure 4J View Figure 4 ), right paramere not hook-shaped ( Figure 4G View Figure 4 ), right medial endosomal lobe longer than left medial lobe and with field of small spicules, left medial endosomal lobe without spicules ( Figure 4F View Figure 4 ), and posterior wall of bursa copulatrix with dorsal lobe ( Figure 6E View Figure 6 ). Stenotus binotatus   differs from S. gressitti   by presence of brown or black markings or stripes ( Figure 1 View Figure 1 ), frons almost flat in lateral view (as in Figure 2F View Figure 2 ), clypeus 0.8 times as long as eye height anteriorly, labium reaching abdominal segment VI, ventral surface of genital capsule 1.5 times as long as dorsal surface ( Figure 5E View Figure 5 ), right medial endosomal lobe longer than left medial lobe ( Figure 5A View Figure 5 ), both medial endosomal lobes bearing field of small spicules ( Figure 5A View Figure 5 ), and posterior wall of bursa copulatrix with dorsal lobe ( Figure 6F View Figure 6 ).

Description – male

Total length 5.3–5.9.

Coloration. Body mostly yellow with reddish tinge ( Figure 1 View Figure 1 ).

Head: mostly yellow, often yellow with reddish tinge anteriorly, with reddish brown stripe on frons, and pale reddish stripe along posterior margin of head, often with brown or reddish stripe along antennal fossa, also with small reddish markings dorsally; clypeus often with reddish markings, mandibular and maxillar plates with reddish stripes and markings. Eye reddish brown to dark brown. Labium with segments I–III mostly yellow, segment IV yellow to pale brown basally and brown to dark brown apically. Antenna with segment I yellow with reddish and reddish brown markings or uniformly reddish; segments II–IV reddish yellow, sometimes with brownish apices, rarely uniformly brown.

Pronotum: mostly reddish yellow, with reddish markings; collar yellow and posterior angles and stripe along posterior margin of collar brown; pronotum sometimes pale brown laterally.

Scutellum: yellow or reddish yellow, with reddish markings.

Mesoscutum: reddish yellow with reddish markings and dark brown angles.

Thoracic pleurites and evaporatorium: yellow or reddish yellow with reddish markings.

Legs: coxae, femora, and tibiae yellow with reddish markings, hind coxa sometimes with dark brown marking basally, tibiae only with few markings, tarsi brown.

Hemelytron: yellow with reddish tinge, with outer margin of corium, embolium, and outer margin of cuneus yellow, inner part of clavus sometimes also yellow.

Abdomen: mostly reddish yellow, with red stripe laterally, often yellow ventrally.

Surface and vestiture: body smooth, moderately shiny, with short pale adpressed setae, distinctly shorter than diameter of antennal segment I. Head, pronotum, scutellum and hemelytron (except membrane) with sericeous silver setae ( Figure 2I View Figure 2 ); antennal segment I with adpressed dark setae, segments II–IV also with some suberect setae; thoracic pleura and coxae with rare pale setae; femora with dark adpressed setae; tibiae with three types of setae – pale adpressed setae, very short dark setae, and brown bristle-like setae; tarsi with adpressed pale setae and very short dark setae.

Structure and measurements. Given in Table 1. Body 3.7–4.2× as long as pronotum. Head, transverse, no space between eye and pronotum ( Figure 2B View Figure 2 ); vertex without transverse basal carina; frons distinctly bulging in lateral view ( Figure 2E View Figure 2 ); clypeus one-half height of eye anteriorly ( Figure 2A View Figure 2 ); eye large, subspherical dorsally, slightly transversely elongated ( Figure 2B View Figure 2 ), its height distinctly greater than width in lateral and anterior views ( Figure 2A, E View Figure 2 ); eye diameter as long as vertex in dorsal view ( Figure 2B View Figure 2 ); vertex 0.9–1.1× as wide as eye. Labium. Reaching middle of metasternum; segment I surpassing anterior margin of pronotum, reaching middle of prosternum, almost as wide as antennal segment I; segments II and III each almost as long as segment I, segment IV slightly shorter than segment I ( Figure 2E View Figure 2 ). Antenna: length subequal to clypeus to cuneus distance; length of segment I one-half head width; segment II 4× as long as segment I, 2.4–2.6× as long as head width, and 1.7–1.9× as long as pronotal width; segment III one-half length of segment II; segment IV slightly shorter than segment III.

Pronotum: posterior margin almost twice as long as anterior margin, 1.6–2.0× as wide as long and 1.3–1.4× as long as head width; collar distinct; calli shallow, but distinctly delimited posteriorly, not fused with each other ( Figure 2B View Figure 2 ).

Evaporatorium: triangular, posterior margin as long as anterior margin, only slightly bulging medially ( Figure 3H View Figure 3 ).

Legs: hind femur almost twice as wide as middle femur; segment I of hind tarsus approximately twice as long as segment II and slightly longer than segment III ( Figure 3A View Figure 3 ); parempodia shorter than claw, pulvilli present ( Figure 3C, F, G View Figure 3 ).

Hemelytron: lateral margins slightly convex; claval vein prominent; lateral margin of cuneus twice as long as base.

Genitalia: genital capsule. Ventral surface 1.3× as long as dorsal surface ( Figure 4E View Figure 4 ). Right paramere, hook-shaped, wide medially ( Figure 4B View Figure 4 ). Left paramere, C-shaped, wide basally, apex strongly hooked ( Figure 4C, D View Figure 4 ).

Endosoma: lateral lobes with dense, distinct dorsal and ventral spicules; right medial lobe without ventral spicules, left medial lobe bulging distally, covered with spicules, distinctly longer than right medial lobe ( Figure 4A View Figure 4 ).

Description – female

Total length 5.7–6.4.

Coloration. Similar to male, except generally slightly paler; abdomen yellow ventrally, often with reddish stripe or marking laterally with dorsum reddish yellow.

Structure and measurements. As in male, except eye diameter shorter than vertex; body 3.7–4.0× as long as pronotum; vertex 1.3–1.7× as wide as eye; antennal segment II 2.1–2.5× as long as width of head, 1.4–1.6× as long as width of pronotum; pronotum 1.8–1.9× as wide as long and 1.5× as wide as head.

Genitalia: sclerotized rings of bursa copulatrix oval, not very distinct ( Figure 6A View Figure 6 ); posterior wall faint, most strongly sclerotized apically, with wide slightly sclerotized medial projection, inter-ramal lobes present, dorsal lobe absent ( Figure 6D View Figure 6 ).

Distribution

Queensland.

Discussion

We did not have material of Stenotus   to compare the three New Guinean species described by Poppius (1915) with those from Australia. However, according to the descriptions given by Poppius, the species from New Guinea can be readily separated by coloration and structure of the head. He described S. brevicollis   and S. bivittatus   from single females and S. clypealis Poppius, 1915   from a single male. Stenotus clypealis   , according to Poppius, is generally darker with brownish black longitudinal stripe on each side of pronotum and with a black clypeus, brownish black pronotum and reddish brown membrane. Additionally, antennal segment I in S. clypealis   almost as long as the head width. The Australian species, S. gressitti   and S. witchelina   , in contrast, have a different colour pattern (see descriptions), and antennal segment I is only half as long as head width (see Table 1). Stenotus bivittatus   can also be separated by the colour pattern, as it has a reddish brown stripe on each side of the head, pronotum, and hemelytra; also the eye in the female is one-half as long as vertex width, whereas in both S. gressitti   and S. witchelina   there are no stripes on the dorsum and the eye is 0.6–0.8× as long as vertex width. Stenotus brevicollis   is generally pale with reddish tinge only on the clavus and can be similar to S. witchelina   in this respect. However, the female of this species has a very wide vertex which is 2.5× as long as the eye width; whereas it is much narrower in S. gressitti   and S. witchelina   (see Table 1).

J

University of the Witwatersrand

L

Nationaal Herbarium Nederland, Leiden University branch

AMNH

American Museum of Natural History

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

BPBM

Bishop Museum

E

Royal Botanic Garden Edinburgh