Trentepohlia (Mongoma) pennipes ( Osten Sacken,

Podenas, Sigitas, Byun, Hye-Woo & Kim, Sam-Kyu, 2015, Limoniinae crane flies (Diptera: Limoniidae) new to Korea, Journal of Species Research 4 (2), pp. 61-96 : 90-91

publication ID	https://doi.org/ 10.12651/JSR.2015.4.2.061
persistent identifier	https://treatment.plazi.org/id/E82987F5-A75A-4A55-FCAF-9E254903FA06
treatment provided by	Felipe
scientific name	Trentepohlia (Mongoma) pennipes ( Osten Sacken,
status

Treatment

1888)

Mongoma pennipes Osten Sacken, 1888: 204 View in CoL .

Trentepohlia (Mongoma) pennipes View in CoL : Edwards, 1911; Alexander, 1920a: 712, 1929: 532.

General body color light grayishyellowish brown. Male body length about 7 mm, female 7.5 mm. Wing length of female 7.1 mm.

Head light gray with darker dorsomedian line and yellow posterior margin. Vertex covered with long brown erect setae. Length of female antenna 2.25 mm, if bent backwards reaches beyond base of abdomen. Scape yellow, cylindrical, covered with scarce brown setae. Pedicel grayish brown, short, widened distally, covered with scarce brown setae. Flagellum 14segmented, same col or as pedicel. Flagellomeres elongate, nearly cylindrical. Apical segment just slightly shorter than preceding flagellomere. Verticils short, 23 times as short as respective segments. Pubescence, covering flagellomeres scarce, whitish to brownish, depending on angle at which light falls on them. Rostrum yellow, but covered with light gray pruinosity. Palpus grayish brown, just basal part of first segment yellow. Labella yellow.

Thorax darker dorsally and frontally, lighter ventrally and posteriorly. Cervical sclerites yellow with posterodorsal dark gray line, which do not reaches frontal margin. Pronotum uniformly light grayishyellowish brown with transverse line of erect brown setae. Mesonotal prescutum polished, light brown with darker brown median stripe. Scutal lobes light brown, turning paler posteriorly. Scutellum pale frontally, light brown posteriorly. Mediotergite strongly polished, light brown with pale frontolateral part. Pleura frontally, including katepisternum and episternum yellowish brown, posteriorly pale, even whitish. Wing ( Fig. 9A View Fig ) hyaline, unpatterned, strongly iridescent, just cell sc slightly darkened. Stigma pale. Veins grayish brown. Venation: Sc long, Sc 1 reaching far beyond branching point of Rs, at the level of R 2. Sc 2 some distance from Sc 1 tip, but far beyond branching point of Rs. Rs branches into R 2 + 3 + 4 and R 5, but further R 2, R 3 and R 4 split apart, thus three branches of Rs reach wing margin. R 2 oblique, twice as long as R 3 + 4 (in female from India, identified by Ch. P. Alexander, it is twice as short as R 3 + 4). R 3 and R 4 strongly diverging, thus cell r 3 very wide at wing margin. R 5 is fused with M 1 + 2 and forms the anterior border of the discal cell. Discal cell strongly elongate, three times as long as wide, narrower towards wing base and getting wider distally. Four veins issuing from it R 5, M 1 + 2, M 3 and CuA 1. Position of basal deflection of CuA 1 slightly varies on both wings of same specimen from Korea. It is short distance before base of discal cell. CuA 2 intersecting A 1 short distance from wing margin, closing cell cup. A 1 slightly sinuous, A 2 very short and strongly bent towards posterior wing margin, like in Trichocera , thus cell a 1 very wide at wing margin. Anal angle small, with rounded posterior margin. Length of female haltere 1.00 mm. Haltere brownish gray with pale basal part of stem. Frontal coxa light brown, medial and posterior coxa light brownish gray. Trochanters light grayish brown with narrowly dark brown distal margin. Femorae light grayish brown, bases slightly lightened distal ends whitened. Frontal femur with 34 strong short spines on basal part of ventral surface and 1214 longer setae beyond middle. Tibiae light grayish brown with distinctly white distal part. White part of middle tibiae slightly widened and provided on each side with a short fringe of white setae in both sexes ( Fig. 9B View Fig ). Basal tarsomere white with slightly darkened base, remaining tarsomeres turning brown towards distal end. Female femur I: 10.0 mm long, II: 11.4 mm, III: 11.4 mm; tibiae I: 12.8 mm, II: 11.6 mm, III: 11.5 mm; tarsus I: 9.6 mm, II: 8.1 mm, III: 6.8 mm long. Claw dark brown with very small indistinct subbasal bump.

Abdomen light brown. Basal tergites grayish, distal yellowish. Posterior margins of tergites narrowly pale. Frontal sternites yellowish, distal brownish. Abdomen covered with scarce semierect setae with brown on dorsal side of abdomen and pale on ventrally. Basal part of ovipositor same color as posterior abdominal segments, tenth tergite light greenishgrayish brown, cercus and hypovalvae polished, rusty brown. Cercus ( Fig. 9C View Fig ) with distal part distinctly curved upwards, pointapexed. Hypovalva straight, getting narrower towards apex, reaching to bending part of cercus.

Alexander (1920a) mentioned that T. pennipes had the habit of clinging to spider webs by means of the fore feet, or, if a fore foot was lacking, one of the middle legs was used. Often twenty or more of these flies were seen hanging close beside one another on a horizontally spun web, all seesawing rapidly up and down and at the same time swaying to and from, sometimes rhythmically, sometimes not. This ludicrous tightrope dance was continued for a long time.

Larvae were collected in decaying plant stems ( Meijere, 1911) and rotting palm (Lodoica maldivica) husks ( Gerlach, 2009).

Elevation range in Korea. Specimens were collected nearly at 500 m altitude.

Period of activity. Adults are flying at the end of August in South Korea.

Habitats. The species was collected by the author on the slope of the mediumsized mountainnous river covered with deciduous forest.

General distribution. The species was known from China (Hainan and Zhejiang), Taiwan, Mozambique, Seychelles, India, Malaysia, Indonesia, Philippines, Sri Lanka, Indonesia, Papua New Guinea ( Oosterbroek, 2015).

Examined materials ( Fig. 10O View Fig ): 1$ (pinned), S. Korea, Jeollanamdo, Guryegun, Tojimyeon , Jirisan National Park , Piagol valley , N35.26590, E127.58096, altitude 446 m, 2014.08.24, coll. S. Podenas ( NIBR) GoogleMaps .