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The Genus Cuernavaca (Hemiptera: Dictyopharidae), Associated with Pontederiaceae in South America, with Redescription and New Records of C

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The Genus Cuernavaca (Hemiptera: Dictyopharidae), Associated with Pontederiaceae in South America, with Redescription and New Records of C ARTICLE The genus Cuernavaca (Hemiptera: Dictyopharidae), associated with Pontederiaceae in South America, with redescription and new records of C. inexacta (Walker) Ana María Marino de Remes Lenicov¹; María Cristina Hernádez²³; Alejandro Joaquín Sosa²⁴ & Marina Inés Oleiro²⁵ ¹ Universidad Nacional de La Plata (UNLP), Facultad de Ciencias Naturales y Museo (FCNyM), División Entomología. La Plata, Buenos Aires, Argentina. ORCID: http://orcid.org/0000-0001-8678-5408. E-mail: [email protected] ² Fundación para el Estudio de Especies Invasivas (FuEDEI). Hurlingham, Buenos Aires, Argentina. ³ ORCID: http://orcid.org/0000-0003-4382-773X. E-mail: [email protected] ⁴ ORCID: http://orcid.org/0000-0002-1680-8712. E-mail: [email protected] ⁵ ORCID: http://orcid.org/0000-0002-5699-5196. E-mail: [email protected] Abstract. The aim of this paper is to shed light on the boundaries of two sympatric species of Cuernavaca, C. inexacta and C. longula, to enable further ecological studies. Species in this genus are associated with water hyacinths in wetlands of Northeastern Argentina (Paraná-Paraguay waterway system) and the Peruvian Amazon. This work lists new host records for Cuernavaca, which include Pontederia crassipes, P. cordata, P. subovata and P. rotundifolia (Pontederiaceae). A redescription for C. inexacta with new diagnostic genitalic features is also provided, as well as an updated identification key and a distribution map. The genus is distributed throughout Central and South America, reaching north and central Argentina in its southernmost distribution. Key-Words. Cuernavaca; Auchenorrhyncha; Dictyopharinae; Water hyacinth; Neotropical wetlands. INTRODUCTION clude Dictyophara herbida (Walker, 1851) where- as Fennah (1945) considered Cuernavaca as a Dictyopharidae is the 6th largest family of plan- synonym of Taosa, emphasizing the taxonomic thoppers (Bartlett, 2018; Bourgoin, 2016; Song value of the male genitalia and also the impor- et al., 2014, 2016a, 2016b, 2018; Urban & Cryan, tance of the first female valvulae for species rec- 2009). It is mainly distributed in tropical and sub- ognition. Synave (1969) and Donovall (2008) also tropical regions, and it currently includes two sub- provided full descriptions and taxonomic remarks families: the Orgeriinae (192 species, 52 genera on the species of Taosa earlier recognized. Later, and subgenera within 4 tribes), which is restricted Emeljanov (2011) redefined Taosini mainly by the to arid zones of the Holartic region, and the cos- presence of trigones on the head and the visibili- mopolitan and diverse Dictyopharinae, compris- ty of frons in dorsal view and included six genera: ing more than 520 species and 127 genera within Brachytaosa Muir (Muir, 1931); Netaosa Emeljanov 15 tribes (Song et al., 2018). (Emeljanov, 2011); Phormotegus Emeljanov Taxonomic revisions of Dictyopharinae have (Emeljanov, 2010); Sicorisia Melichar (Melichar, been published at the generic and suprageneric 1912); Taosa and Cuernavaca. levels (Fennah, 1945; Melichar, 1912; Muir, 1923) Recently, Song et al. (2018) presented a valu- but Emeljanov (1969, 1983, 1997, 2008, 2010, able contribution on the tribe-level phylogeny of 2011, 2014) was the first to contribute to high- Dictyopharidae, which supports the monophyly er-level phylogenetic studies in the group. Within of 12 tribes (except Taosini + Lappidini whose lim- the eight tribes defined by Emeljanov (1983), the its have not been clearly established yet). This phy- monogeneric Taosini is widely represented in logenetic analysis indicates that Taosini is para- tropical America. Taosa (Distant, 1906), was ini- phyletic with Netaosa sister to the combination of tially revised by Muir (1931), who distinguished Cuernavaca, Taosa and the tribe Lappidini, placing 12 species based on the shape and carination Cuernavaca and Taosa into Taosini s.s. The genus of head. Metcalf (1945) established Cuernavaca Cuernavaca currently embraces three species: Kirkaldy (1913) as a subgenus of Taosa to in- C. inexacta (Walker) [= T. inexacta Walker (Walker, Pap. Avulsos Zool., 2020; v.60: e20206011 ISSN On-Line: 1807-0205 http://doi.org/10.11606/1807-0205/2020.60.11 ISSN Printed: 0031-1049 http://www.revistas.usp.br/paz ISNI: 0000-0004-0384-1825 http://www.scielo.br/paz Edited by: Cristiano Feldens Schwertner Received: 15/04/2019 Accepted: 04/12/2019 Published: 06/02/2020 Pap. Avulsos Zool., 2020; v.60: e20206011 Remes Lenicov, A.M.M. et al.: Cuernavaca spp. associated with Pontederiaceae in South America 2/9 1858), C. longula (Remes Lenicov) [= T. (C.) longula Remes ferred to 10% glycerol microvials for long-term storage. Lenicov (Remes Lenicov & Hernández, 2010)] and C. her- Dissections from the male and female genitalia were bida (Walker) [= T. herbida (Walker) (Walker, 1851)]. fixed in Faure’s medium for morphological analysis and Dictyopharids are known to feed predominantly on illustration, according the procedures outlines in Remes a variety of dicotyledonous herbs, with a few species re- Lenicov & Hernández (2010). Observations, measure- corded on monocots (Bourgoin, 2016; Denno & Perfect, ments and pictures were made using a stereomicroscope 1994; Wilson et al., 1994; Wilson & O’Brien, 1987). This LEICA EZ5 and a RRID 18 HD digital camera. Digital im- group also include a few species that are agricultural ages were assembled using Combine ZM open software pests of significant economic importance (Bourgoin, (Hadley, 2011) and improved with the Adobe Photoshop 2016; Krstić et al., 2016). Information on host plant as- CS5 software. sociations and the effects caused by the herbivory of Morphological terminology and measurements fol- Cuernavaca species is fragmented (Hernández et al., low Song et al. (2016a, b) for the majority of characters, 2011a, b; Maes & O’Brien, 1988; Sacco et al., 2013). In Bourgoin et al. (2015) for tegmina venation, and Bourgoin South America, Cuernavaca inexacta was regarded (1993) for female genitalia. Reported measurements by Bennett & Zwolfer, 1968 as a potential biocontrol (median and range) were taken from 10 specimens of agent of the water hyacinth Pontederia crassipes Martius each sex and are given in millimeters. (Pontederiaceae) [ex Eichhornia crassipes (Mart.) Solms- Laub. (Pellegrini et al., 2018)]. Our taxonomic assessment Abbreviations on each measurement are as follows: of Cuernavaca associated with water hyacinths revealed L. = total length (from apex of head to apex of forewings); that C. longula coexist with other related species from B.L. = body length (from apex of head to tip of abdo- the upper Amazon River (Remes Lenicov & Hernández, men); W.L. = forewing length. One additional measure- 2010; Remes Lenicov et al., 2012). These species are sym- ment is relative; length: width ratio (L:W) of the vertex, patric in part of their distribution, and should be prop- which was measured along the vertex midline and near erly distinguished among themselves so their potential its mid-length respectively. as biocontrol agents can be more thoroughly explored. Therefore the aim of this paper is to redescribe C. inex- A distribution map of Cuernavaca species was assem- acta in detail, incorporating new diagnostic characters of bled with QGIS 3.02 using literature records and from the male and female genitalia, and updating a key to the the material examined; new distributional records are species of Cuernavaca, as well as distribution and host marked with an asterisk (*). plant associations. RESULTS MATERIAL AND METHODS Taxonomy Examined specimens Cuernavaca Kirkaldy, 1913 The taxonomic assessment presented here was main- ly based on primary types and secondary types, but also Morphological and phylogenetic studies given by included specimens listed in the original descriptions or Emeljanov, 2011 and Song et al., 2018, respectively, show identified by renowned specialists in the field. Additional that Cuernavaca and Taosa are closely related. Cuernavaca specimens were specifically collected in wetlands of may be separated from the latter by the following char- Northeastern Argentina (in the Paraná and Paraguay riv- acters: head relatively short, frons broad not visible in ers basin) and the Peruvian Amazon. We used a sweeping dorsal view, tegmina membranous with a second rank of net or manual techniques on natural mats of free-float- postnodal closed cell on membrane; female with oviposi- ing aquatic species: P. crassipes, P. cordata L., P. subovata tor elongate, anterior connective lamina of gonapophysis (Seub.) Lowden and P. rotundifolia L. Specimens studied VIII with 12 or more small, longitudinally arranged teeth, in the course of this work are deposited in the following gonoplacs extremely elongate and narrow with with a institutions, which are subsequently referred to by their bunch of long setae near apex on ventral lobe. acronyms: British Museum of Natural History (BMNH), The three species presently included in this genus London, UK; Muséum National d’Histoire Naturelle can be distinguished by the following key. (MNHN), Paris, France and Museo de Ciencias Naturales de La Plata (MLPA), Argentina. Key to species of Cuernavaca (Modified from Remes Lenicov & Hernández, Morphological studies 2010: 334) Specimens were killed in 95% ethyl ether to preserve 1. Uniformly green with a pair of small dark spots on each side of their coloration. Genital segments were dissected and mesonotum; male with gonostyles shorter than anal segment, cleared in 10% KOH at room temperature for ca. 24-48 suboval; females with strongly elongated
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