Pseudomicrocara livida (Fabricius, 1775)

Libonatti, María Laura & Ruta, Rafał, 2013, Review of the Argentinean species of Pseudomicrocara Armstrong (Coleoptera: Scirtidae), Zootaxa 3718 (2), pp. 137-157 : 180-181

Pseudomicrocara livida (Fabricius, 1775)

( Figs. 5 , 19, 20 , 31 , 50 , 57, 58 , 84–89 )

Cistela livida Fabricius, 1775: 116 (type locality: Tierra del Fuego).

Dascillus lividus: Guérin-Méneville 1849: 8 (transferred to Dascillus as doubtful species); Kolbe 1907: 71 (Strait of Magellan); Bruch 1914: 236 (checklist; Tierra del Fuego).

Pseudomicrocara livida: Ruta 2013: 57 (redescription).

Diagnosis. Large size (TL: 5.34–6.02 mm; EW: 3.07–3.44 mm). Habitus elongate-broadly oval. Body color uniformly pale except for brown-maculated abdomen. Mandibles with spines on molar region, symmetrical, both lacking teeth. Male terminalia: tergite 8 with a pair of sclerotized apodemes converging posteriorly, posterior margin rounded, with setae; tergite 9 with a pair of subparallel sclerotized apodemes connected by a weakly sclerotized cross-piece, posterior margin bilobed, with setae; sternite 8 V-shaped, anterior margin pointed, with setae near posterior margin; sternite 9 with posterior margin bilobed, a pair of sclerotized apodemes widening posteriorly, with setae. Male genitalia: tegmen with basal margin emarginate, parameres broad at base, narrowing gradually to the middle, continuing very narrow to apex, apex acute, styli present; penis with lateral margins of basal piece converging posteriorly, basal margin rounded, trigonium with lateral margins slightly converging posteriorly to the middle of trigonium, continuing parallel to apex, apex truncate, curved ventrally, parameroids with one spine-like piece on each base, near internal margin, apex rounded. Female genitalia: prehensor composed of two symmetrical sclerites with a row of three to four spines on external margin, two symmetrical triangular sclerites and one elongated sclerite between the latter two; bursella with pores producing into cone-like structures lacking spines. Females lacking setal patch on ventrite 4.

Type material: Holotype, not sexed (NHM): Cistela livida [handwritten] / Fab. Entom. [printed] p. 116 n. 2 [handwritten].

Additional specimens: Tierra del Fuego Province: Fagnano Lake, Kaiken, 100 m, 18–19. i.1979, 1 ex., Misión Científica Danesa (ZMUC). Ushuaia, Lapataia, 20 m, 27–28. i.1979, 3 exx., 29-31. i.1979, 3 exx., Misión Científica Danesa (ZMUC).

Chubut Province: Esquel, Menéndez Lake, El Sagrario Puerto, 2–4.i. 1982, 600 m, 1 ex., Nielsen & Karsholt (ZMUC).

Río Negro Province: Nahuel Huapi National Park, Ñireco River, 41° 11’ 51.9” S 71° 19’ 40.5” W, 962 m, 23.i–18. ii.2007, 1 ex., Malaise, leg. Analía Garré & Fernanda Montes de Oca (MLP). Nahuel Huapi National Park, Grande stream, 41° 02’ 21.6” S 71° 48’ 27” W, 763 m, 4–25. ii.2007, 7 exx., Malaise, leg. Analía Garré & Fernanda Montes de Oca (NHM).

Neuquén Province: Paso Carirriñe, 15. ii.1966, 1 ex. (IADIZA). Pucará, october 1971, 2 exx. (IADIZA). Junín de los Andes, Laguna Verde, 1000 m, 11. iii.1979, 1 ex., Misión Científica Danesa (ZMUC). Nahuel Huapi National Park, Mallín La Heladera, 41° 00’ 56” S 71° 49’ 45.4” W, 878 m, 7.i–4. ii.2007, 8 exx., Malaise, leg. Analía Garré & Fernanda Montes de Oca (MLP).

Distribution. So far this species had only been found in Tierra del Fuego Province. Based on the material examined in this study, Neuquén, Río Negro and Chubut Provinces are added to the distribution range.

Figures

FIGURES 1 – 8. Habitus illustrations of Argentinean species of Pseudomicrocara, dorsal view. 1) P. angusta sp. nov.; 2) P. antarctica; 3) P. hieroglyphica sp. nov.; 4) P. inflexipenis sp. nov.; 5) P. livida.; 6 – 7) P. obliquata; 8) P. patagonica. Scale bar = 1 mm.

FIGURES 16 – 26. Mandibles and labium of Pseudomicrocara. 16 – 18) P. inflexipenis sp. nov.; 19 – 20) P. livida; 21 – 23) P. obliquata; 24 – 26) P. patagonica.

FIGURES 27 – 33. Pronota of Pseudomicrocara. 27) P. angusta sp. nov.; 28) P. antarctica; 29) P. hieroglyphica sp. nov.; 30) P. inflexipenis sp. nov.; 31) P. livida; 32) P. obliquata; 33) P. patagonica.

FIGURES 43 – 51. Female genital morphology of Pseudomicrocara. 43 – 46) P. antarctica: 43) sternite 8, 44) tergite 8, 45) ovipositor + genital tract (ovaries excluded) (scale bar = 0.5 mm), 46) prehensor; 47) P. angusta sp. nov., prehensor; 48) P. hieroglyphica sp. nov., prehensor; 49) P. inflexipenis sp. nov., prehensor; 50) P. livida, prehensor; 51) P. patagonica, prehensor. Abbreviations: bsa: bursa, bsl: bursella, bslp: bursella pores, ovc: common oviduct, prh: prehensor.

FIGURES 52 – 59. Bursella pores of Pseudomicrocara. 52 – 53) P. hieroglyphica sp. nov.; 54 – 55) P. antarctica; 56) P. patagonica; 57 – 58) P. livida; 59) P. angusta sp. nov.

FIGURES 84 – 89. Male terminalia and genitalia of P. livida. 84) Sternite 8; 85) sternite 9; 86) tergite 8; 87) tergite 9; 88) tegmen; 89) penis. Scale bar = 0.5 mm.