Thinodromus meridionalis, Makranczy, 2013

Makranczy, György, 2013, Review of the southern African species of Thinodromus (Coleoptera: Staphylinidae: Oxytelinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 177-208: 205-206

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Thinodromus meridionalis

sp. nov.

Thinodromus meridionalis   sp. nov.

( Figs 2 View Figs 1–3 , 23 View Figs 19–27. 19 , 34–35 View Figs 34–39. 34–35 , 60–61 View Figs 58–63. 58–59 , 64–66 View Figs 64–69. 64–66 , 80 View Figs 77–80. 77–78 )

Trogophloeus (Carpalimus) capensis: SCHEERPELTZ   (1974: 59, misidentified).

Type locality. South Africa, KwaZulu-Natal prov., Albert Falls, Umgeni river E of Pietermaritzburg, approx. 29°37′14″S, 30°27′28″E, 600 m.

Type material. HOLOTYPE: J, “ S. Afr. Natal; Albert Falls , Umgeni; River, E Pietermaritz-; burg; 13.IV.[19]51 No. 272 \ Swedish South Africa; Expedition; 1950-1951; [P.] Brinck - [G.] Rudebeck \ capensis; Bernh.” ( MZLU). Note. The male holotype is missing both antennae but the first three antennomeres of the right one   . PARATYPES (3 specimens): “ S. Afr. Cape Prov.; Buffeljags River , 4; miles E Swellendam [approx. 34°01′43″S, 20°30′08″E, 100 m]; 27.II.[19]51 No. 185 \ Swedish South Africa; Expedition; 1950-1951; [P.] Brinck - [G.] Rudebeck \ capensis; Bernh. \ Trogophloeus   ; (Carpalimus); capensis Bernh.   ; det. Scheerpeltz, 1968” (1 ♀, MZLU) GoogleMaps   ; Type [paper disc, curator label] \ Taken in; flood drift \ S. Africa.; R.E. Turner; Brit. Mus.; 1923-414. \ Port St. John [s],; Pondoland. [approx. 31°36′43″S, 29°32′16″E, 10 m]; Aug 1-6.1923. \ Trogophloeus   ; capensis Brnh.   ; Typ. \ Syn-;Type [paper disc, curator label]” (1 ♀, BMNH) GoogleMaps   ; South Africa, Bushmanland , Onseepkans, 28°45′S, 19°15′E, 28.viii.1976, leg. S. Endrődy-Younga (E-Y 1177), shorewashing (1 ♀, TMSA) GoogleMaps   .

Description. Measurements (in mm, n = 3): HW = 0.48 (0.46–0.50); TW = 0.43 (0.41–0.45); PW = 0.53 (0.51–0.55); SW = 0.68 (0.63–0.73); AW = 0.75 (0.70–0.82); HL = 0.30 (0.28– 0.31); EL = 0.17 (0.16–0.175); TL = 0.04 (0.03–0.04); PL = 0.39 (0.37–0.41); SL = 0.70 (0.65–0.76); SC = 0.64 (0.60–0.69); FB = 1.35 (1.31–1.38); BL = 2.54 (2.31–2.70). Lustre and colour: Body ( Fig. 2 View Figs 1–3 ) moderately shining. Head brownish black, abdomen the same with reddish tint, pronotum blackish dark brown with slight reddish tint, elytra the same but apex a little darker. Antennae and mouthparts dark brown, legs uniformly medium brown. Shape and sculpture: Head and pronotum ( Fig. 34 View Figs 34–39. 34–35 ) rather small compared to most species, eyes largely occupy side of head, temples small but discernible. Pronotum transverse, first half of sides and anterior corners broadly rounded, sides straight in posterior half, posterior corners blunt, not conspicuous; first half of sides and anterior corners strongly rounded. A rather deep and broad horseshoe-shaped impression anteriorly runs towards middle of sides with a little adjoining depression near anterior corners. Middle of disc with two shallow impressions on either side. Deflexed margin thin, apparent in posterior 3/5 of side and at posterior edge near corners. Elytra ( Fig. 35 View Figs 34–39. 34–35 ) combined a little broader than long, dilated towards apex, with slight longitudinal impressions posterior of scutellum and a rather inconspicuous depression at anterior 1/3 of disc. Posterior elytral margin with conspicuous membranous lobe in outer half, pulled out slightly near outer corner. Apex of abdominal tergite VII with palisade fringe (widest medially). Punctation and microsculpture: Head punctation rather deep and dense, punctures of medium size, interspaces only a portion of diameters. Pronotal punctures larger, similarly deep but more sparse, interspaces on average half of puncture diameters; in posterior corners finely sculptured/punctured area replaces punctation. On elytra moderately deep and dense punctation with mostly microsculpture-free, shiny interspaces; punctures of rather uneven sizes, interspaces on average half of puncture diameters. Abdominal tergites fairly deeply punctured but predominantly shiny due to lack of microsculpture and interspaces nearing diameters of punctures. Traces of microsculpture only immediately posteriad of basal ridges. Pubescence: Forebody pubescent with medium long and quite even sized setae, mostly pressed down and anteriorly directed on head and pronotum. Setation on abdomen more varied, row of conspicuously long setae on posterior edges of tergites. Primary and secondary sexual features: Female antennae ( Fig. 23 View Figs 19–27. 19 ) slightly elongate, middle antennomeres (articles 4–5) a little longer than broad, penultimate antennomeres (articles 9–10) just slightly broader than long. Male: MA of aedeagal internal sac medium large, curved, spoon-like, ML small, not so transverse, BM rather elongate, pin-like, with proximal part feebly thicker than distal, BA long, S-shaped (proximal part slightly inward curving), AC small, rather evenly arched, reverse U-shaped ( Figs 64–66 View Figs 64–69. 64–66 ), sternite VIII ( Fig. 60 View Figs 58–63. 58–59 ), tergite X ( Fig. 61 View Figs 58–63. 58–59 ); female: ringstructure and spermatheca ( Fig. 80 View Figs 77–80. 77–78 ).

Differential diagnosis. Thinodromus meridionalis   is closely allied to T. tibialis   (shared features are listed there) but the male aedeagus in T. meridionalis   sp. nov. is with AC not pointed at apex, BM thread-like, while in T. tibialis   the AC apex is pointed and has a membranous proximal broadening, BM widened in the apical 2/3. Thinodromus meridionalis   sp. nov. has some rather conspicuous incisions on the basal edge of male sternite VIII, on both ends of the medial 1/3, in T. tibialis   the basal edge is straight. Regarding the female ringstructure, both species have almost perfectly round apical arch of the ringstructure and no apical broadening or angle, but the basal loop appears to be broader and shorter in T. tibialis   , in T. meridionalis   sp. nov. the basal turns are more narrowly rounded. T. tibialis   is otherwise a slightly larger species.

Etymology. The name is derived from the Latin word for “southern”.

Distribution. Only known from the Republic of South Africa.


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Transvaal Museum