Chaetopodella DUDA, 1920

Hayashi, T. & Papp, L., 2007, Oriental Species Of Chaetopodella Duda (Diptera: Sphaeroceridae), Acta Zoologica Academiae Scientiarum Hungaricae 53 (2), pp. 117-130 : 118-120

Chaetopodella DUDA, 1920

Limosina (Chaetopodella) DUDA, 1920: 435 . – Type species: Limosina scutellaris HALIDAY, 1836: 329 (mon.).

Leptocera (Chaetopodella) DUDA ; DUDA, 1925: 75.

Chaetopodella DUDA, 1920 : HACKMAN (1969: 203), ROHÁČEK (1983: 112), etc., as genus.

ROHÁČEK (1983) discussed correctly its morphology, including that of the genitalia. This time we summarise only some of the most characteristic features (for more details see ROHÁČEK 1983, 1998):

A genus of Limosinini . Outer and inner occipital pairs of setae strong, inner occipitals almost crossing. No inner orbitals on frons. Two pairs of strong frontoorbitals, or, anterior pair reduced to short thin setae. Vibrissa not strong, gena with 2 rows of short proclinate setae above peristomals. Three to four pairs of postsutural dorsocentral setae. Scutellum deep velvety black, 2 pairs of scutellar setae only. Wings clear, definitely shorter than body and comparatively narrow. First costal section of wing with medium-long setae, subbasally with paired strong setae. Mid trochanter with an extremely long anterior (lateral) seta apically. Mid tibia without ventral preapical seta, ventroapical seta distinct. Mid basitarsus with a distinct (though usually thin) anteroventral seta.

Abdomen with very long setae on lateral caudal edge of tergites, particularly so for females.

Male preabdomen of four normal segments only: even 5th segment strongly modified: tergite 5 very short, forms half of a ring, medially (sagittally) desclerotised in most of the species. Male sternite 5 short with a pair of setose caudal processes. Syntergosternite 6–8 complex of an intricate form ( Figs 1–2 , 8 , 13 ). Surstylus usually consists of two lobes. Postgonites join directly to aedeagal apodeme (dorsally) and through a pair of laths to phallobase ( Figs 11 , 15 , 19, 22 ). Ejaculatory apodeme not discernible in most of the species (except for Ch. nigrinotum ).

Female individuals generally larger than males; abdominal sternites comparatively small (not broad) and not strongly melanised, except for sternite 8. Female cerci short, oblique to the body axis, usually with short thin setae only. Spermathecae semiglobular: globular in water but since they have a large desclerotised part (“hole”) apically, they become flat in glycerol.

The Chaetopodella species are distributed in the Palaearctic and the Afrotropical regions – and as we would like to make known through this paper – also in the Oriental region. The status of the Leptocera (Chaetopodella) albocincta RICHARDS, 1964 (from the Solomon Islands, Vanuatu) needs revision. Hitherto five species have been described: Ch. cursoni (RICHARDS, 1939) from South Africa, Ch. denigrata (DUDA, 1925) from Tanzania and Zaire, Ch. impermissa (RICH-

process at broadest. Scales: 0.2 mm for Figs 1–2 , 0.1 mm for Figs 3, 5, 7 and for Figs 4, 6 , respectively

ARDS, 1980) (syn. Ch. congoensis VANSCHUYTBROEK, 1950 ) from Zaire, Ch. lesnei (SÉGUY, 1933) from Mozambique and Ch. scutellaris ( HALIDAY, 1836) from Ethiopia and the Palaearctic Region. However, several other species still await description in the Afrotropical Region. The Neotropical species Leptocera biseta DUDA, 1925 has been transferred to the genus Gyretria ENDERLEIN, 1938 (cf. ROHÁČEK et al. (2001). Leptocera (Chaetopodella) tonsa DUDA, 1925 from Costa Rica belongs to an undescribed genus (see MARSHALL 2001).

This paper includes notes and some figures also for the only Palaearctic species, Ch. scutellaris ( HALIDAY, 1836) .

Chaetopodella scutellaris ( HALIDAY, 1836) – In the HNHM there are more than 800 specimens from Hungary and from a number of European countries, as well as from Turkey, Georgia, Afghanistan, the Russian Far East ( Amur region , Zeya zapovednik) and North Korea. This time we studied the male genitalia of a male from England (its type locality) and those of a male from North Korea. As one can see while comparing details of the genitalia ( Figs 1–5 , cf. Figs 6–7 , see also figs 823–827 of ROHÁČEK 1983), that there are distinct differences. We are afraid that a subspecific splitting of this species is unavoidable, but now we do not want to do it .

If we compare the genitalia ( Figs 1–7 ) to those of the Oriental species, it is obvious that none of the Oriental species is close to Ch. scutellaris . Hopefully closer relatives will be found among the Afrotropical species.

Figures

Figs 1–7. Chaetopodella scutellaris (HALIDAY), male postabdomen and genitalia. 1–5 = a male from England: 1 = preabdominal sternites, ventral view, 2 = same, left lateral view, 3 = 5th sternite, ventral view, 4 = medial part of 5th sternite, higher magnification, 5 = surstylus, lateral processat broadest; 6–7 = a male from North Korea: 6 = medial part of 5th sternite, higher magnification, 7 = surstylus, lateral

Figs 8–12. Chaetopodella latitarsis sp. n., paratype male, genitalia.8 = postabdominal sclerites, ventral view, 9 = surstylus, broadest lateral view, 10 = same, broadest ventral view, 11 = postgonite and

Figs 13–17. Chaetopodella nigrinotum sp. n., paratype male, genitalia. 13 = postabdominal sclerites, caudal view, 14 = postgonite, phallophore and phallapodeme, lateral view; 15 = surstylus, inner view (with paramere), 16= male genitalia,caudal view,17 =5th sternite,ventral view.Scale:0.1mm for all

Figs 18–24. Chaetopodella spp. n., paratype males, genitalia. 18–20 = Ch. orientalis sp, n.: 18 = surstylus in broadest (subventral) view, 19 = postgonite and phallapodeme laterally, 20 = 5th sternite, ventral view; 21–24 = Ch. ornata sp. n.: 21 = 5th sternite, ventral view, 22= postgonite and phallapodeme laterally, 23 = surstylus, lateral view, 24 = same, ventral view. Scales: 0.05 mm for Fig. 18, 0.1 mm for Figs 19–24