Leiodes longitarsis Baranowski, 1993

Hoshina, Hideto, 2012, Review of the tribes Sogdini and Leiodini from Japan and North Chishima Islands. Part II. Genera Hydnobius and Leiodes (Coleoptera: Leiodidae), Acta Entomologica Musei Nationalis Pragae (suppl. 1) 52, pp. 1-168 : 63-65

11. Leiodes longitarsis Baranowski, 1993

Japanese name: Tsumenaga-ô-tamakinokomushi ( Figs. 36–38 , 113 )

Leiodes longitarsis Baranowski, 1993: 43 .

Type locality. Canada, Alberta, Banff National Park.

Material examined. NORTH CHISHIMA ISLANDS: 7♂♂, 4♀♀, Ushishir , Yankicha Island, Environs of Kraternaya Bay, 20.viii.1995 ( HUMS) ; 2♀♀, Simushir Island , Inland costal margin of Malaya Bay, 18.viii.1995 ( HUMS) ;

1 ♂, Simushir Island, Inland costal margin of Srednaya Bay , 21.viii.1995 ( HUMS). JAPAN: HOKKAIDO: 1 ♂, Rishiri Is., Mt. Rishiri , 4.–7.vii.1979, H. Henmi leg. ( HUMS) ; 1 ♂, Rishiri Is., Mt. Rishiri , 8.viii.1990, K. Kishimoto leg. ( FUFJ) ; 4 ♂♂, 3 ♀♀, Rishiri Is., Mt. Rishiri (alt. 1700 m), 17.–31.vii.2001, S. Hori & M. Maruyama leg. ( FUFJ) .

Diagnosis. Coloration. Dorsum usually unicolor, dark reddish brown; antennae brownish; antennomeres 7, 9, 10, and basal 3/5 of antennomere 11 often darker than others; apical 2/5 of antennomere 11 often light brown.

Body 3.5–4.5 mm long, ca. 1.7× as long as wide ( Fig. 36A ); head densely and minutely punctate, bearing some large punctures ( Fig. 36A ); antennomeres 1–3 each longer than wide; antennomeres 4, 5 and 11 about as long as wide; remaining antennomeres each wider than long; antennomere 11 oval ( Fig. 36C ). Pronotum feebly sinuate at posterior margin, densely and minutely punctate ( Fig. 36A ). Elytra not transversely strigose; each elytron bearing nine rows of punctures with small number of large punctures and moderate number of fine punctures between rows ( Fig. 36D ); row 9 invisible in dorsal view, subhumeral row as long as ca. 1/4 or 1/3 of elytral length ( Fig. 36B ); elytral rows composed of larger and deeper punctures than those of pronotum ( Fig. 36A ); sutural stria fine, arising from apex to ca. apical half of the elytral length. Metathoracic wings fully developed. Mesoventrite without distinct excavation between median carina and transverse carina ( Fig. 36E ); median carina of mesoventrite low ( Fig. 36E ); metaventrite showing sexual dimorphism. Legs showing distinct sexual dimorphism of protarsi, mesotarsi, metafemora, metatibiae, and metatarsi; protibiae gradually and distinctly widening from base towards apex ( Figs. 37E, 37F ); metafemur with moderate dorsal posteroapical projection ( Figs. 37G, 37H ).

Male. Tarsomeres 2–4 of protarsi and mesotarsi expanded ( Fig. 37A ); metafemora triangularly protuberant ca. at basal 1/3 of posterior margins ( Fig. 37C ); metatibiae relatively slender and weakly curved inwards ( Fig. 37C ); metatarsi clearly longer than those of female ( Fig. 37C ); metaventrite with dense golden-yellow pubescence on middle portion ( Fig. 36F ); abdominal sternite 8 strongly curved ( Fig. 38C ); aedeagus as shown in Figs. 38A, B .

Female. Protarsi and mesotarsi slender ( Fig. 37B ); metafemora almost straight at posterior margins ( Fig. 37D ); metatibiae relatively robust and almost straight ( Fig. 37D ); metaventrite with sparse semitransparent pubescence at middle portion ( Fig. 36G ); abdominal sternite 8 with spiculum ventrale at central point of anterior margin ( Fig. 38D ); coxites and stylus as shown in Fig. 38E .

Differential diagnosis. Leiodes longitarsalis is similar to L. obesa ( Schmidt, 1841) in elytral appearance, but can be distinguished from the latter by having a large body (3.5–4.5 mm), dark reddish dorsum, weakly curved male metatibiae ( Fig. 37C ), and the median lobe of the aedeagus with the feebly excised apex ( Fig. 38A ). In contrast, L. obesa has a relatively small body (3.0–4.0 mm), usually brown dorsum, relatively strongly curved male metatibiae ( Figs. 83C, 83D ), and median lobe with a simply rounded apex ( Fig. 84A ).

Distribution. U.S. A (Arizona and Colorado), Canada (Alberta, British Columbia, and Manitoba) ( BARANOWSKI 1993), North Chishima Islands, Japan: Hokkaido (Rishiri Is.). New to North Chishima Islands and Japan. Leiodes longitarsis is recorded here for the first time from the Palaearctic Region.

Figures

Fig. 36. Leiodes longitarsis Baranowski, 1993.A – body, dorsal view; B – ditto, lateral view; C – antenna; D – elytral punctures; E – mesoventrite, lateral view; F – male metaventrite; G – female metaventrite. Scale I: 1 mm for A and B; II: 0.5 mm for C; III: 0.5 mm for E; IV: 1 mm for F and G.

Fig. 37. Leiodes longitarsis Baranowski, 1993. A – male fore leg, ventral view; B – female fore leg, ventral view; C – male hind leg, ventral view; D – female hind leg, ventral view; E – male protibia, dorsal view; F – female protibia, dorsal view; G – male metafemur, dorsal view; H – female metafemur, dorsal view. Scale I: 1 mm for A, B, C, and D; II: 0.5 mm for E and F; III: 0.5 mm for G and H.

Fig. 38. Leiodes longitarsis Baranowski, 1993. A – aedeagus, dorsal view; B – ditto, lateral view; C – male abdominal sternite 8; D – female abdominal sternite 8; E – coxite and stylus. Scale I: 0.5 mm for A and B; II: 0.2 mm for C and D; III: 0.1 mm for E.

Fig. 113. Distribution of Leiodes longitarsis Baranowski, 1993 in the Palaearctic Region.

Fig. 83. Leiodes obesa (Seidlitz, 1841). A – male fore leg, ventral view; B – female fore leg, ventral view; C – hind leg of male specimen (body size: 3.6 mm), ventral view; D – ditto (body size: 3.2 mm); E – female hind leg, ventral view; F – male protibia, dorsal view; G – male metafemur, dorsal view; H – female protibia, dorsal view; I – female metafemur, dorsal view. Scale I: 0.5 mm for A and B; II: 1 mm for C, D, and E; III: 0.2 mm for F and G; IV: 0.2 mm for H and I.

Fig. 84. Leiodes obesa (Seidlitz, 1841). A – aedeagus, dorsal view; B – ditto, lateral view; C – male abdominal sternite 8; D – female abdominal sternite 8; E – coxite and stylus. Scale I: 0.5 mm for A and B; II: 0.2 mm for C and D; III: 0.1 mm for E.