Olmiana argentina Guglielmino & Bückle & Emeljanov 2010, sp. nov.
Creators: name: Guglielmino, A.
name: Bückle, C.
name: Emeljanov, A. F.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Achilidae
Olmiana
Olmiana argentina

description: Olmiana argentina sp. nov.   
 Holotype: Male: Argentina: Neuquén, Parque Nacional Lanin, Lago Lacar, Pucará; 21/XI/2007; in rotten log of Nothofagus; Olmi leg.; (MLPA).   
 Paratypes: 7 Males, 3 Females, Argentina: Neuquén, Parque Nacional Lanin, Lago Lacar, Pucará; 21/XI/ 2007; in rotten log of Nothofagus; Olmi leg.; (2 males, 1 female in MLPA; 4 males, 1 female in CG; 1 male, 1 female in ZIN).   
 Measurements:   
 Description: All specimens macropterous. Both sexes dark brown, mottled with yellowish specks (Figs 8A–D).   
Colouration: Vertex brown, with anterior margin and rounded matt area on each side light brown. Frons brown in upper half except for pair of small rounded lighter areas near upper margin; in lower half mottled light brown except for wide arcuate dark brown band along fronto-clypeal suture. Postclypeus yellowish, adjacent to anteclypeus with wide medially interrupted brown band extending laterally over distal half of lorae. Anteclypeus light brown. Genae mottled brown; upper half of lorae yellowish. Pronotum mottled brown with discal region darker. Mesonotum irregularly brown, spotted with yellow, apically yellowish; wide irregular band along anterior margin except for carinae and transverse band at about half length darker brown. Fore wings brown, flecked with yellow; veins in basal region dark with lighter spots, yellowish towards apex. Hind wing membrane fuliginous, veins uniformly darkish brown, except for transverse vein MP-CuA and small part of adjacent veins, which are whitish. Pro- and mesofemora dark brown with wide preapical light band; pro- and mesotibia dark brown with sub-basal band and apex light yellowish; tarsomeres dark brown. Hind legs uniformly light brown. Abdominal segments dark brown with pale borders.  
Hind legs: Tibia with 2+5 or 2+6 teeth in apical row and four smaller ones in preapical row. First tarsomere elongate, apical margin dorsally with narrow, very deep incisure, ventrally with irregular row of nine teeth, without platellae. Apical margin of second tarsomere dorsally with wide and less deep incisure, ventrally with row of 13–14 teeth, each with platellae except for marginal ones (Figs 1E, 1F).  
Male genitalia: Pygofer as in Figs 4A–C. Anal tube (Figs 3F–H) inserted in deep dorsal elliptical notch of pygofer. Styli as in Figs 3A–E. Apical part of aedeagus (Figs 4D–F) in sub-basal position with dorsolateral strongly sclerotised rings, attached dorsally to pygofer notch. Dorsal part of periandrium mediobasally between sclerotised rings deeply concave, slightly sclerotised, with several distal longitudinal wrinkles and double fine carina sagittally (Fig. 4D). Internal surface of periandrial dorsal lobe with elevated sagittal papillose lamella (sdl in Fig. 5A). Ventral margins of lateral parts of periandrium (Fig. 4F) folded back as wide papillose lamellae (ifl in Fig. 5B). Parallel to dorsal margin of lateral periandrial part on inner side with second dorsally bent longitudinal lamella (ill in Fig. 5B) forming, together with inner side of dorsolateral part of periandrium and sagittal inner lamella, channel for genital rods, basally nearly fully closed tube-shaped with only narrow fissure medioventrally (Fig. 5B). Ventral lobes (Fig. 4E) with narrow, rounded and dorsally bent distal extremity and crenate lateral and distal margins. Penis rods as in Figs 4G, 4H.  
Female genitalia: Seventh abdominal sternum subrectangular, more than twice as wide as long. Posterior margin straight or slightly concave. Valvifer VIII strongly developed. Gonapophysis VIII with five teeth enlarging towards apex (Fig. 6).  
 Remarks: The dorsal lobe of periandrium displays an internally visible suture-like longitudinal line on each side of its apical part, which may indicate the fusion line of two, once separate, apical lobes: a laterodorsal one and a medioventral one.   
 Fifth instar (Fig. 7)   
 Measurements: Total length: 5.6 mm; width over wing pads: 3 mm; thoracic length: 2.2 mm.   
 Description: Vertex subquadrate, widening apically, with anterior margin convex, anterior corners rounded, lateral margins converging posteriorly, posterior margin straight. Two large gibbosities touching each other along sagittal line in basal 2/3, covering almost entire surface of vertex (Fig. 7A). Frons with very smooth medial carina, extending more distinctly onto postclypeus. Margins of frons convergent towards clypeus. Between inner and outer lateral carina two rows of pits: medial row with eleven large sensory pits, lateral one with ten smaller sensory pits. Frontoclypeal suture laterally very distinct, evanescent near middle line (Fig. 7B). Rostrum long, extending beyond metacoxae.   
Each thoracic tergite divided in a pair of plates. Pronotal plates laterally carinate from anterior to posterior margin, with six large pits (Fig. 7A). Ventrally folded portion of pronotal plates with large gibbosity anteriorly, posteriorly with eleven pits (Fig. 7B). Mesonotum plates acutely carinate along almost entire length of lateral margin, dorsally with three longitudinal carinae on each side: one along middle line, one near lateral margin, hook-shaped around anterior group of sensory pits, and one in intermediate position, vanishing anteriorly. Five sensory pits on anterior part of mesonotal plates, four indistinct pits near lateral margin (Fig. 7A) and five pits on ventrally folded section of plates (Fig. 7B). Metanotum with three carinae in similar position as on mesonotum and five small sensory pits between sublateral and intermediate carina.  
Pro- and mesotarsus two-segmented (Fig. 7C). Hind tibia with single tooth on outside margin, with apical row of seven teeth ventrally. Metatarsus three-segmented, first segment with seven apical teeth, second segment with seven or eight apical teeth ventrally (Fig. 7D).  
Abdomen with nine segments (Fig. 7A). Tergites VI–VIII with pair of large lateral wax-pore plates. Sensory pits distributed on each side of tergites IV–IX:  
Tergite IV: one group of eight large sensory pits laterally; one large submedial sensory pit.  
Tergite V: as tergite IV, but with seven sensory pits laterally.  
Tergites VI–VII: laterally, outside the wax-pore plates, group of four large and two smaller sensory pits; one large sensory pit submedially.  
Tergite VIII: as tergite VII, but lateral group with five large and two small sensory pits (not completely visible in Fig. 7A).  
Tergite IX: two sensory pits medio-anteriorly; two large pits medio-caudally (not visible in Fig. 7A).  
In addition to the sensory pits there are small lens-shaped circular or oblong sensilla distributed on several sectors of the integument (around sensory pits of pronotum and mesonotum, along posterior margin of tergites I–V, near submedian sensory pits of tergites VI–VIII).  
Colouration: Vertex and face brown; thorax brown with yellowish-white lightly sclerotised longitudinal area along mid-dorsal line; abdominal segments yellowish-white with large brown sclerotised areas dorsally; legs yellow.  
 Remarks: This description is based on a single specimen. The large distance between the thoracic plates indicates it is the fifth instar, shortly before the moult to adulthood.   
 Geographic distribution: Argentina: Neuquén, Lanín National Park, Lago Lacar, Pucará.   
 Ecology: Adults and the single nymph were collected in November in a decaying Nothofagus trunk attacked by unidentified mushrooms within a large forest of Nothofagus. The immature stages are most likely mycophagous. The feeding behaviour of the adults is unknown.
description: Published as part of Guglielmino, A., Bückle, C. & Emeljanov, A. F., 2010, Olmiana argentina, a new genus and species of Achilidae (Hemiptera, Fulgoromorpha) from Argentina., pp. 47-58 in Zootaxa 2661 (1) on pages 49-57, DOI: 10.11646/zootaxa.2661.1.3, http://zenodo.org/record/5301791