Pogonostoma (Bathypogonum) Jeannel, 1946

Razanajaonarivalona, Elysé Hugo, Moravec, Jiří & Rakotomanana, Hajanirina, 2021, New or rare Madagascar tiger beetles- 20. Pogonostoma (Bathypogonum) horimichioi sp. nov. and supplemented characters of P. (B) levigatum levigatum (W. Horn) and P. (B.) levigatum lucens Rivalier (Coleoptera: Cicindelidae), Zootaxa 4926 (2), pp. 245-262 : 247-248

Pogonostoma (Bathypogonum) Jeannel, 1946 (sensu Moravec 2007)

Pogonostoma (Bathypogonum) Jeannel, 1946: 114 (sensu orig.).

Type species. Pogonostoma levigatum W. Horn, 1908: 367 (by monotypy and original designation).

Differential diagnosis, complemented by additional characters (of the new species) over against the diagnosis in Moravec (2007). Aedeagus uniquely shaped in its lateral view ( Figs 22–23 , 41, 43 ) voluminous and straight (with very short basal portion), apically constricted into cylindric rounded apex, combined with characteristically shaped labrum and lacinia and irregular setal vesture of dorsal elytral surface.All species of Pogonostoma (Eupogonostoma) Moravec, 2007 possess similar shape of their buccal appendages, but fundamentally differ in having regular setal vesture (as in nominotypical subgen. Pogonostoma ). Lacinia ( Figs 13 , 33 ) with markedly dilated, outward-convex and distinctly inward-recurved apex. Labrum ( Figs 9–11 , 31–32, 38 ) 8–10-setose with 6–7 anterior and 2 lateral setae, characteristically shaped, possessing distinct central convexity that is laterally markedly outlined by deep furrows which usually meet each other anteriorly; labral anterior margin with teeth moderately bent downward. Palpi of usual length, black, terminal palpomeres in female of nearly regular shape. Body large, either dorsally metallic black-cyaneous with purple lustre, or black and notably matt. Pronotal disc either notably shiny with surface sculpture of very shallow, partly effaced transverse rugae, or very irregularly verruculose-rugulose. Elytra either deep violaceous-blue, metallic-blue with purple or golden-bronze or greenish lustre, or entirely black and matt, densely punctate throughout; punctures deep, occasionally anastomosing; elytral apex sexually dimorphic ( Figs 14–17 , 34, 36 ). Setal vesture of dorsal surface consists of whitish, cinnamon-coloured or dark setae (they may appear almost whitish on black surfaces, while darker or black on white surfaces; elytral setal vesture irregular, consisting of short, whitish or pale cinnamon-coloured or ferrugineous ornamental setae which are not confined to punctures but arising from barely visible setigerous microtubercles which irregularly cover intervals between the punctures.

Six known species of subgenus Neopogonum Moravec, 2007 are distinguished from those of subgenus Bathypogonum by very different shapes of their aedeagi, different general habitus and some characters which include a minutely tuberculate sculpture on their pronotal disc which lacks long, hairlike lateral setae, male mandibles with notably elongated apex of terminal teeth, apex of lacinia with less prolonged inward-recurved margin, terminal palpomeres more asymmetrical, and elytral surface more bumpy, covered with larger setigerous tubercles.

P. (Parapogonum) sericeum Klug, 1835 , the only known species of the subgenus Parapogonum Moravec, 2007 , is clearly distinguished from all species of the subgenera Bathypogonum and Neopogonum by a very different character of its labrum and almost normally shaped lacinia (the labrum of Parapogonum sericeum is semicircular with nearly effaced teeth and has even surface).

Remarks. The subgenus Bathypogonum was established by Jeannel (1946) with type species Pogonostoma levigatum W. Horn, 1908 , thus as a monobasic subgenus with only one species Pogonostoma (Bathypogonum) levigatum .

Rivalier (1970) described one new subspecies P. (B.) levigatum lucens Rivalier, 1970 , and simultaneously placed six other Pogonostoma species (previously accommodated in subgenus Microstenocera Jeannel, 1946 ) into the subgenus Bathypogonum . Because of principal distinguishing characters, the six species were later ( Moravec 2007) placed into the two above-mentioned subgenera: subgen. Neopogonum , (with type species Pogonostoma comptum, Rivalier, 1970 and comprising other five species) and subgen. Parapogonum (with type and unique species Pogonostoma sericeum Klug, 1835 ).

For the detailed descriptions and illustrations of all taxa of the subgenera Bathypogonum , Neopogonum and

Parapogonum , including type specimens, see the monograph of the genus ( Moravec 2007).

Figures

FIGURES 19–25. Pogonostoma (Bathypogonum) horimichioi sp. nov. (all from type locality). 19–21—pronotum: 19—♁, HT (OSAKA); 20—ditto, detail of surface sculpture; 21—♀, AT (CCJM); 22–25—male aedeagus: 22— HT (OSAKA); 23—PT (SDEI); 24—ditto, dorsal view; 25—ditto, ventral view. Bars = 1 mm.

FIGURES 39–44. Pogonostoma (Bathypogonum) levigatum. 39–42— P. (B.) l. levigatum W. Horn. 39–40—pronotum: 39—♁, Marotaonala (CCJM); 40—♀, Vohemar (CCJM ex APCA); 41–44—male aedeagus or its apex: 41—showing internal sac, Ma- rotaonala; 42—ditto, dorsal view; 43–44—P. (B.) l. lucens Rivalier. 43—Ramena River (SDEI); 44—ditto, dorsal view. Bars = 1 mm.

FIGURES 4–13. Pogonostoma (Bathypogonum) horimichioi sp. nov. (all from type locality). 4—head, ♁, HT (OSAKA); 5—right labial palpus, ♁, PT (SDEI); 6–8—mandibles: 6—♁, HT; 7—♁, PT (SDEI); 8—♀, AT (CCJM); 9–11—labrum: 9—♁, HT; 10—♁, PT (SDEI); 11—♀, AT (CCJM); 12—head, ♀, AT; 13—galea and lacinia, ♁, PT (SDEI). Bars = 1 mm.

FIGURES 29–38. Pogonostoma (Bathypogonum) l. levigatum W. Horn. 29–30—mandibles: 29—♁, Marotaonala (CCJM); 30—♀, Vohemar (CCJM ex APCA); 31—32—labrum: 31—♁, Marotaonala; 32—♀, Vohemar; 33—lacinia, ♁, Marotaonala; 34—elytron, ♁, ibid; 35—ditto, sculpture on elytral disc; 36—♀, elytral apex, Vohemar; 37—ditto, ♀ elytral disc; 38—labrum, Amboanio, ST (SDEI). Bars = 1 mm.

FIGURES 14–18. Pogonostoma (Bathypogonum) horimichioi sp. nov. (all from type locality). 14–15—elytral apices: 14—♁, HT (OSAKA); 15—♀, AT (CCJM); 16–17—elytron: 16—♁, HT; 17— ♀, AT (CCJM); 18—detail of sculpture on elytral disc, ♁, HT. Bars = 1 mm.