A new genus and species of Saccharosydnini (Hemiptera: Fulgoromorpha: Delphacidae) from Argentina (original) (raw)
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A New Species of Saccharosydne Kirkaldy from Argentina (Hemiptera: Delphacidae).
Neotropical Entomology, 2010
Saccharosydne is the most diverse genus of the tribe Saccharosydnini. Male, female and nymphal Saccharosydne have been captured in recent collections from garlic (Allium sativum), rye (Secale cereale) and pampas grass (Cortaderia spp.) in Argentina. In this contribution, we describe and illustrate a new species S. subandina sp. nov., adding information on the geographical distribution and host plants. Saccharosydne subandina can be distinguished from its congeners by the following combination of features: uniformly light green-yellowish color with a distinctive rounded black macula on both genae; vertex 1.5x longer than wide, and projecting beyond eyes almost one half of its length; parameres divergent with internal and external angles acute; and dorsolateral angles of pygofer produced caudad. A key for species identifi cation based on male genitalia and external morphology, is provided. KEY WORDS: Fulgoromorpha, taxonomy, host plant, distribution The Saccharosydnini (Delphacinae) includes the primarily Neotropical genera Neomalaxa Muir (one species, N. fl ava), Pseudomacrocorupha Muir (one species, P. wagneri) and Saccharosydne Kirkaldy (seven species) Asche (1985). The tribal diagnostic characteristics include the presence of seven (2+5) post-tibial distal spines, the hind wings with M and Cu fused almost all of its length and the distal anal vein not forked (convergence with most Delphacinae: Tropidocephalini). The genus Saccharosydne is distinguished mainly by the slender and elongated forms; head much narrower than pronotum, and angular in profi le; vertex extended before eyes; median carina forked on vertex; and pronotum with lateral carinae reaching posterior margin. The male terminalia with aedeagus well developed, represented by a caudally directed process and an elongate long tube coiled within pygofer anteriorly directed; pygofer subcylindrical; parameres dorsocaudally directed; the lack of processes on the anal segment and the anal style elongate. The genus is represented in the Neotropical region by six species: S. brevirostris (Muir), S. gracillis (Muir), S. ornatipennis (Muir), S. rostifrons (Crawford), S. saccharivora (Westwood) and S. viridis (Muir) (Metcalf 1943, Asche 1985, Rossi Batiz & Remes Lenicov 2009). Male, female and nymphs of Saccharosydne were recently collected from garlic (Allium sativum), rye (Secale cereale) and pampas grass (Cortaderia spp.) in Argentina. These specimens have morphological characteristics different from those of described Saccharosydne, thus we describe as a new species, S. subandina sp. nov., and provide information on its geographical distribution and biology. Given that the species of this genus are insuffi ciently studied-the original descriptions for most of them are not fully adequate, we provide an identification key based on the external morphology and male genitalia to distinguish the new species from the previously described ones. Material and Methods Almost all adults studied were fi eld collected on garlic in agricultural areas from Mendoza and San Juan provinces using water traps and sweep nets; others were hand captured on pampas grass and rye from several sites in Argentina. Both male and female genitalia of the specimens were prepared for microscopic examination according to standard taxonomic techniques (Remes Lenicov & Virla 1993); the dissected parts were stored in microvials with glycerin. Scanning electron microscopy was used to illustrate some male genital structures; specimens were fi xed by soaking in formol for 48h, then dried and coated with 65-70 μm gold-palladium fi lm. Measurements were taken for ten specimens with each sex reported independently, taken with an optical micrometer, in millimetres, followed by the range in parentheses. Paratype specimens of S. viridis, S. gracillis, S. brevirostris and S. ornatipennis from the British Museum Natural History collection were examined. Illustrations were drawn using a stereoscopic microscope with a camera lucida. We follow the Asche´s (1985) terminology to describe the main morphological features of the male and female, especially the genital structures; we also follow Yang & Yang (1986) for the head terminology.
2010
Saccharosydne is the most diverse genus of the tribe Saccharosydnini. Male, female and nymphal Saccharosydne have been captured in recent collections from garlic (Allium sativum), rye (Secale cereale) and pampas grass (Cortaderia spp.) in Argentina. In this contribution, we describe and illustrate a new species S. subandina sp. nov., adding information on the geographical distribution and host plants. Saccharosydne subandina can be distinguished from its congeners by the following combination of features: uniformly light green-yellowish color with a distinctive rounded black macula on both genae; vertex 1.5x longer than wide, and projecting beyond eyes almost one half of its length; parameres divergent with internal and external angles acute; and dorsolateral angles of pygofer produced caudad. A key for species identifi cation based on male genitalia and external morphology, is provided.
New distributional records of Delphacidae (Hemiptera: Fulgoroidea) from Chile
Chionomus haywardi (Muir, 1929) (previously known for Argentina and Uruguay), Syndelphax dissipatus (Muir, 1926) (previously known for Ecuador, Brazil, Panamá and Costa Rica) and Dicranotropis bipectinata Muir, 1926 (previously known for Ecuador) are recorded for the first time from Chile. Additionally, the known distribution range of Delphacodes darwini Muir, 1929 (previously known only from Los Lagos region) is expanded up to Coquimbo region and Delphacodes kuscheli Fennah, 1955 (previously known from Juan Fernández Islands, Argentina and Uruguay) is recorded for first time from continental Chile. Photographs and diagnostic characters of the males are provided. Resumen: Nuevos registros de distribución de Delphacidae (Hemiptera: Fulgoroidea) de Chile. Se registran por primera vez para Chile las especies Chionomus haywardi (Muir, 1929) (previamente conocida de Argentina y Uruguay), Syndelphax dissipatus (Muir, 1926) (previamente conocida de Ecuador, Brasil, Panamá y Costa Rica) y Dicranotropis bipectinata Muir, 1926 (previamente conocida de Ecuador). Adicionalmente, el rango de distribución conocido de Delphacodes darwini Muir, 1929 (previamente conocida sólo de la región de Los Lagos) se amplía hasta la región de Coquimbo y Delphacodes kuscheli Fennah, 1955 (previamente conocida del archipiélago de Juan Fernández, Argentina y Uruguay) se registra por primera vez para Chile continental. Se proporcionan fotografías y caracteres diagnósticos de los machos.
Studies on Neotropical Fauna and Environment, 2011
The genus Saccharosydne Kirkaldy 1907 includes eight species, two of which are pests of sugarcane in tropical America and rice in Asia. Saccharosydne subandina Remes Lenicov & Rossi Batiz described from Argentina feeds on pampas grass, garlic and rye in agricultural subandean areas of different provinces. This study provides information on the immature stages of S. subandina, including a key for their separation, based on laboratory reared specimens and field observations.
Astatometopon gen. nov. is described to accommodate A. sakakiba-rai sp. nov., a delphacid planthopper distributed in the Nahuelbuta and Andes mountain ranges in the central and south central zones of Chile. The new taxon is placed into Delphacini but it presents some unusual features for the tribe, such as a strongly asymmetrical phallus with a porrect process arising from base, the absence of teeth on the hind margin of calcar, and an exceptional variation in carination of the eumetope. Resumen. Astatometopon gen. nov. es descrito para acomodar a A. sakakibarai sp. nov., un delfácido distribuido en las cordilleras de Nahuelbuta y los Andes en las zonas centro y centro sur de Chile. El taxón es clasifi cado en Delphacini pero presenta características inusuales para la tribu, como un falo fuertemente asimétrico con un proceso porrecto erigido desde la base, la ausencia de dientes en el margen posterior del calcar, y una variación excepcional en la carenación de la eumetopa.
2015
2Kelisia vittata Muir, 1926 is the only New World species nomenclaturally in the Kelisiinae from south of the contiguous USA. The delphacid genus Kelisia Fieber, 1866 (Kelisiinae: Kelisiini) consists of 46 species of Laurasian distribu tion, plus 2 species of uncertain status, one ( Kelisia nigripennis Muir 1929) from South Africa and one ( Kelisia vittata Muir 1926) from Brazil. In North America, Kelisia includes 12 species found from southern Canada to Texas, all of which appear to be specialized sedge feeders (Beamer 1945, 1951; Bartlett & Wheeler 2007, Bartlett et al., 2014). Muir’s (1926) illustrations of Kelisia vittata (viz. Figures 50-51) are sufficient to show that it belongs to the Delphacini (Del phac inae), not the Kelisiinae, but they are not adequate to place the genus (hence its omission by Caldwell and Martorell 1951). Muir’s type material consisted of 4 males, 3 females from Campinas, Brazil, and 1 male from ‘Villa Americana’ (both Sao Paulo state, Brazil). Here the...
Entomological News, 2009
The genus Procidelphax, gen. nov., is described to accommodate two unusual new Tropidocephalini, P. depressa, n. sp. and P. dejecta, n. sp., from Peru and Bolivia, respectively. Procidelphax, gen. nov., is easily distinguished from all other New World Tropidocephalini by being strongly dorsoventrally flattened, and having the median carina of the frons broadly forked ventrad. The New World Tropidocephalini is briefly reviewed and a provisional key to the five genera provided.