Discovery and lectotype designation of Longitarsus californicus (Motschulsky) (Coleoptera, Chrysomelidae, Galerucinae, Alticini) Author Konstantinov, Alexander S. 0000-0001-6578-6735 Systematic Entomology Laboratory, USDA, ARS, c / o Smithsonian Institution, National Museum of Natural History, Washington DC, USA Author Savitsky, Vladimir Yu. 0000-0002-6680-754X Zoological Museum of Lomonosov Moscow State University, Moscow, 125009, Russia Author Zabaluev, Il’ya A. 0000-0002-1558-5502 Zoological Museum of Lomonosov Moscow State University, Moscow, 125009, Russia text ZooKeys 2024 2024-08-09 1209 231 244 journal article 10.3897/zookeys.1209.124692 191301E5-7C11-4CE1-A296-8A0E90A88C18 Longitarsus californicus (Motschulsky) Figs 1–8 , 9–15 , 16–23 Teinodactyla californica Motschulsky, 1845: 382 (type locality: Californie ; lectotype , ♀ , designated here, ZMUM ). Type material examined. Lectotype : ♀ , labels (Figs 7 , 8 ) ( ZMUM ). (1) “ Teinodact californica m California ” in V . I. Motschulsky’s handwriting on white paper; (2) “ Zoomuseum of MSU ( Moscow , RUSSIA ) [in Russian] Nº ZMUM Col 02777 Zool. Mus. Mosq. Univ. (Mosquae, ROSSIA ) ex coll. V . I. Motschulsky ” printed on pink paper; (3) “ Lectotypus Teinodactyla californica Motschulsky, 1845 A. Konstantinov, V. Savitsky et I. Zabaluev des. 2024 ” printed on red paper; (4) “ Longitarsus californicus ( Motschulsky, 1845 ) A. Konstantinov det. 2024 ” printed on white paper. Lectotype is missing hind right leg, left protarsomeres 2–4, and 11 antennomere of right antenna. Antennomeres 3–11 of left antenna, left protarsomere 1, right mesotibia and mesotarsi are glued to a white card below the specimen mount. Abdomen and genitalia are placed in genitalia vial with glycerin. Material examined. ( 2 ♀ , 1 ♂ , USNM ). (1) “ Amedee, Cal, July 21–28, 4200 ft , Wickham ”; (2) “ Wickham Collection, 1933 ”; (3) “ Longitarsus californicus Horn ” handwritten on yellowed paper with a red border; (4) “ Longitarsus californicus (Motschulsky) , det A. Konstantinov 2024 ”. Diagnosis. Head with vertex covered by reticulation. Supracallinal sulci thin, antennal calli separated from vertex by thin line. Frontal ridge elongate, wider between antennal sockets, narrower towards clypeus. Antennomere 2 longer than 3. Antennomere 3 as long as 4. Pronotal surface with coarse reticulation. Elytra posteriorly about as long as abdomen, covering nearly all abdominal tergites. Receptacle of spermatheca elongate. Receptacle and pump distinctly to abruptly separated from each other. Spermathecal canal with coils. Vaginal palpus slender, with apex subdeltoid. Anterior sclerotization of vaginal palpus much narrower than posterior sclerotization. Description. Body (Figs 1 , 5 ) length 2.21–2.40 mm , width 1.08–1.15 mm (the lectotype 2.4 mm long and 1.15 mm wide). Pronotum and elytra light yellowish; 5 apical antennomeres, head and metafemur slightly darker. Longitarsus californicus (Motschulsky) , Lectotype 1 habitus, dorsal view 2 pronotum 3 head, frontal view 4 left antennae with antennomeres 1 and 2 missing 5 habitus lateral view 6 right mesotibia and mesotarsi 7 labels 8 lectotype as currently mounted with labels and genitalia vial. Longitarsus californicus (Motschulsky) , Lectotype 9 abdominal tergites 10 abdominal ventrites 11 spermatheca 12, 13 vaginal palpi, ventral and lateral views 14, 15 tignum, ventral and lateral views. Longitarsus californicus (Motschulsky) , California specimens (USNM) 16 pronotum and head dorsal view 17 head, frontal view 18 abdominal tergites 19 abdominal ventrites 20 spermatheca 21 vaginal palpi, ventral view 22 tignum, ventral view 23 median lobe of aedeagus, ventral and lateral views. Head (Figs 2 , 3 , 16 , 17 ). Vertex covered with relatively coarse reticulation. Supracallinal sulci thin, antennal calli separated from vertex by thin line. Surface of antennal calli moderately shiny, lacking reticulation, but with few minute punctures. Frontal ridge elongate, wider between antennal sockets, narrower towards clypeus. Anterofrontal ridge relatively narrow (Figs 3 , 17 ), posteriorly gradually merging with frons, forming inverted T-shaped structure with frontal ridge. Antennomere 2 longer than 3. Antennomere 3 about as long as 4. Thorax. Pronotal punctures relatively large (Figs 2 , 16 ), slightly smaller than elytral punctures, as densely placed as elytral punctures. Surface between punctures coarsely reticulated. Elytra with humeral calli well developed. Elytral punctures do not form longitudinal rows. Surface between punctures reticulated. Female pro- and mesotarsomere 1 as wide as pro- and mesotarsomere 2. In males protarsomere 1 about twice as wide as protarsomere 2; mesotarsomere 1 wider at the base narrowing towards apex. Abdomen (Figs 9 , 10 , 18 , 19 ). In female, abdominal tergites 5 and 6 with two symmetrically placed patches of short setae. Pygidium with evenly spaced long setae. Abdominal ventrite 2 with marginal setae interrupted on both sides of the middle (Fig. 19 ). Complete rows of marginal setae situated on ventrites 3 and 4. Ventrite 5 with middle strip lacking long setae. Genitalia (Figs 11–15 , 20–23 ). Receptacle of spermatheca elongate, distinctly separated from pump, much longer than it. Internal side convex, external side concave. Pump with short curved denticle on top. Spermathecal canal with multiple coils, at base directed along the side of receptacle. Vaginal palpus slender with apex subdeltoid. Anterior sclerotization of vaginal palpus much narrower than posterior sclerotization. Tignum with posterior sclerotization about as wide as middle. Anterior sclerotization variable; in lectotype narrow, not wider than middle; in USNM specimen wider than middle, spoon-shaped. Median lobe of aedeagus nearly straight in lateral view, apex slightly S-shaped. In ventral view nearly parallel-sided. Apex gradually narrowing, without denticle. Membranous window narrow, constricting towards base and not reaching it.