Clistoabdominalis hyrcania

Kazerani, Farzaneh & Kehlmaier, Christian, 2018, A new species of the genus Clistoabdominalis Skevington (Diptera: Pipunculidae) from Iran, with a key to the Western Palaearctic species of the Clistoabdominalis ruralis group, Zootaxa 4425 (3), pp. 582-588: 583-587

publication ID

https://doi.org/10.11646/zootaxa.4425.3.11

publication LSID

lsid:zoobank.org:pub:8FEAFCE5-0F8F-4085-A99A-CF98429E2946

persistent identifier

http://treatment.plazi.org/id/03D41F69-FFDB-9D7C-FF50-FADAFA763EAA

treatment provided by

Plazi

scientific name

Clistoabdominalis hyrcania
status

sp. nov.

Clistoabdominalis hyrcania  sp. nov.

Type material. HOLOTYPE: Golestan province, Shast-Kola ; 36°44'1'' N, 54°23'53'' E, 849 m, 10.viii.2017, 1♂, leg. F. Kazerani, coll. RIFR.GoogleMaps 

Description. MALE ( Figs 2 View Figure , 3 View Figure ). Body length 3.2 mm; wing length 3.5 mm; eyes meeting for a slightly shorter distance (0.7 times) than frons length. Head. Face and frons greyish white dusted, parallel-sided. Clypeus greyish white dusted ( Fig. 2b View Figure ). Palpus about 1/8 the height of eye, yellowish white with dark tip ( Fig. 2b View Figure ). Proboscis yellowish brown with light apical hairs ( Fig. 2b View Figure ). Occiput greyish white dusted. Antenna with pedicel dark brown, with 2–3 minute dorsal and ventral bristles. Postpedicel pointed, yellowish brown with white outer border, about 2.5× as long as deep (in its widest part). Arista about 2× as long as postpedicel, dark brown, with thickened base ( Fig. 2b View Figure ). Thorax. Black, narrowly golden dusted along dorsal, frontal and lateral margins. Postpronotal lobe yellow. Pleura greyish dusted. Scutellum dark brown, slightly greyish dusted. Wing. Membrane very slightly and evenly infuscated ( Fig. 2a View Figure ); covered with microtrichia except at base; pterostigma brown and complete; third costal segment about 0.6× as long as fourth costal segment, cross vein r-m reaches cell dm at 1/3 of its length, apical section of R4+5 about 3.5× as long as proximal section, halter white with darkened knob. Legs. Coxae and trochanters brown, fore and mid femora dark brown except yellow in apical 1/5, femora lacking any distinct ventral black spines; tibia mostly yellow, fore and mid tibia brown in apicoventral half, hind tibia brown in basal half, tarsal segments yellow except distitarsus; pulvilli shorter than distitarsus ( Fig. 2a View Figure ). Abdomen. Tergites 2–5 mostly dusted dorsally, with silver posterolateral patches extending onto posterior corners of dorsum; silver dusting most extensive dorsally on tergite 1. Sternites 2–5 dark brown and rectangular in dorsal view, covered by scattered minute bristles; sternite 6 pollinose and swollen internally. Genitalia. Epandrium dark brown and asymmetrical ( Fig. 3c View Figure ); wrapping around dorsally and visible in dorsal view. Cerci yellow. Surstyli yellowish brown; in strictly dorsal view pointed apically with yellow bristles; both surstyli boot-shaped in dorsal view; right surstylus with a medial protuberance; left surstylus without protuberance medially ( Figs 2d View Figure , 3d View Figure ). In lateral view, both surstyli with a triangular apicoventral projection and a short finger-like apex ( Figs 2e–f View Figure , 3e–f View Figure ). In ventral view, gonopods subequal, right one clearly longer ( Figs 2c View Figure , 3a View Figure ); phallic guide straight, rather short, cone-shaped, and with a small hook-like apex in lateral view ( Figs 3a–b View Figure ); phallus trifid and gently bent ( Fig. 3a View Figure ). FEMALE. Unknown.

Differential diagnosis. Due to its strong resemblance with C. dilatatus  , known from western and central Europe and redescribed and illustrated by Kehlmaier (2005a), C. hyrcania  sp. nov. is attributed to the C. ruralis  species group. Among other features, the C. ruralis  group lacks a ventral projection on the syntergosternite 8 (present in the C. electus  group), and has a non-deflected hypandrium (basally deflected by about 90° in the C. trochanteratus  group). The males of C. hyrcania  sp. nov. can be separated from those of C. dilatatus  by comparing the lateral shape of the surstyli (see Figs 2e–f View Figure and 3e–f View Figure , in comparison with Kehlmaier 2005a: figs 9i and 9k). In lateral view, both species exhibit a ventroapical triangular projection on both surstyli which is more pronounced in C. hyrcania  sp. nov. ( Figs 3e–f View Figure ). In addition, the actual apices of the surstyli are more elongated, a feature that can also be observed from strictly dorsal view ( Fig. 3d View Figure ).

Etymology. The specific epithet ‘ hyrcania  ’ is the Persian spelling of Hyrkania [Үρκανία], the Greek noun for the historical region composed of the land south-east of the Caspian Sea, where the type locality of the new species is found. It is to be treated as a noun in apposition.

An identification key to the males of the Clistoabdominalis ruralis  species group from the Western Palaearctic region

1 Left surstylus in lateral view with an apicoventral projection ( Figs 1f View Figure , 2f View Figure ; Kehlmaier 2005a: Figs 9k, 11l)............... 2 - Left surstylus in lateral view without an apicoventral projection................................................ 4 2 Left surstylus in lateral view with an apicoventral projection situated at its apex ( Kehlmaier 2005a: Fig. 11l). Right surstylus shaped differently, with blunt apex ( Kehlmaier 2005a: Fig. 11j).................................. C. ruraliS (Meigen)  (Distribution: a widespread Palaearctic species, apparently absent from boreal/subarctic regions.)

- Left surstylus in lateral view with an apicoventral projection situated clearly before its apex ( Figs 1f View Figure , 2f View Figure ). Right surstylus almost shaped identical............................................................................... 3

3 Apicoventral projections of surstyli large ( Figs 1e–f View Figure )..... C. hyrcania  sp. nov. (Distribution: only known from northern Iran)

- Apicoventral projections of surstyli small ( Kehlmaier 2005a: Figs 9i, k)..................................................................... C. dilatatuS (De Meyer)  (Distribution: restricted to France, Portugal, Spain and Switzerland)

4 In strictly dorsal view, both surstyli are sickle shaped, with a long inner fingerlike projection ( Kehlmaier 2005a: Fig. 10j)..................................................................................... C. imitator (De Meyer)  (Distribution: Mediterranean species, known from France, Israel, Portugal and Spain)

- In strictly dorsal view, both surstyli are of different shape, the left one being roughly triangular ( Kehlmaier 2005a: Fig. 1 2fView FIGURE 1View FIGURE 2; Kehlmaier 2005b: Fig. 9c)............................................................................. 5

5 Syntergosternite 8 without a membranous area. In dorsal view, fingerlike projection of right surstylus narrow ( Kehlmaier 2005b: Fig. 9a). Phallic guide shorter and broader than in the following species ( Kehlmaier 2005b: Fig. 9c)........................................................ C. SinaienSiS (De Meyer)  (Distribution: only known from Egypt and Iran)

- Syntergosternite 8 with a membranous area. In dorsal view, fingerlike projection of right surstylus rather broad ( Kehlmaier 2005a: Fig. 12f). Phallic guide longer and narrower than in the above species ( Kehlmaier 2005a: Fig. 12a)................................................. C. tumiduS (De Meyer) (Distribution: France, Greece, Italy, Spain and Switzerland)