Russian Entomol. J. 15(3): 327–333 © RUSSIAN ENTOMOLOGICAL JOURNAL, 2006 First fossil record of Cedusini in the Eocene Baltic amber with notes on the tribe (Hemiptera: Fulgoromorpha: Derbidae) Ïåðâàÿ èñêîïàåìàÿ íàõîäêà Cedusini â ýîöåíîâîì áàëòèéñêîì ÿíòàðå ñ çàìå÷àíèÿìè î òðèáå (Hemiptera: Fulgoromorpha: Derbidae) Jacek Szwedo ß. Øâåäî Department of Systematics and Zoogeography, Museum and Institute of Zoology, Polish Academy of Sciences, Wilcza 64, PL 00- 679 Warszawa, Poland. E-mail: [email protected] Отделение систематики и зоогеографии, Музей и институт зоологии ПАН, Вильча 64, PL 00-679 Варшава, Польша. KEY WORDS: Hemiptera, Derbidae, Cedusini, taxonomy, new genera, new species, new combinations, Eocene, Baltic amber, fossil insects. КЛЮЧЕВЫЕ СЛОВА: Hemiptera, Derbidae, Cedusini, таксономия, новые роды, новый вид, новые комбинации, эоцен, балтийский янтарь, ископаемые насекомые. ABSTRACT. New extinct genus and species — Emelja- Introduction novedusa gentarna gen.n. et sp.n., of the planthopper family Derbidae, tribe Cedusini, from the middle Eocene The planthopper family Derbidae houses a large Baltic amber is described. New extant genera of Cedusini number of species. It is one of the largest and most are established: Hauptenia gen.n., Muiredusa gen.n., morphologically differentiated family among Fulgoroi- Produsa gen.n. New combinations are given: Hauptenia dea. Fennah [1952] and Emeljanov [1995] elaborated magnifica (Yang & Wu, 1993), comb.n.; H. jacula (Yang classification and evolution of Derbidae, but the distri- & Wu, 1993), comb.n.; H. fellea (Yang & Wu, 1993), bution of some characters still remains controversial comb.n., H. glutinosa (Yang & Wu, 1993), comb.n., H. and the available data are not sufficient to substantiate idonea (Yang & Wu, 1993), comb.n., Muiredusa brun- nea (Muir, 1914), comb.n., M. littorea (Yeh & Yang, the phylogeny of the group. Numerous taxonomic prob- 1993), comb.n., M. ignota (Yeh & Wu, 1993), comb.n., lems within the group remain, and Derbidae, as well as Produsa concava (Yang & Wu, 1993), comb.n., and P. their subunits, are sometimes believed to be paraphyle- cubica (Yang & Wu, 1993), comb.n. Key to genera placed tic [Emeljanov & Fletcher, 2004]. The higher classifica- in Cedusini is given and placement of the fossil genus tion of extant Derbidae has recently been presented by and its relationships within the tribe are discussed. Emeljanov [1995], who presented a more detailed sys- tem based on external morphological characters. He РЕЗЮМЕ. Новый ископаемый род и вид цикадо- divided Derbidae into three subfamilies and 18 tribes. вых семейства Derbidae, трибы Cedusini — The subfamily Cedusinae comprises the tribes Ipsnoli- Emeljanovedusa gentarna gen.n. et sp.n. описан из ni, Goneokarellini, Vinatini, Cedusini, Phrygiini, and re- среднего эоцена балтийского янтаря. Установлены cently [Emeljanov & Fletcher, 2004] the tribe Breddinio- новые роды для современных Cedusini: Hauptenia lini Fennah, 1950, formerly placed in Achilidae [Fennah, gen.n., Muiredusa gen.n., Produsa gen.n. Предложе- 1950; Emeljanov, 1991, 1992b] but lately transferred here. ны новые комбинации: Hauptenia magnifica (Yang & Subfamily Derbinae comprise the tribes Cedochreini, Wu, 1993), comb.n.; H. jacula (Yang & Wu, 1993), Dawnarioidini, Derbini, Cenchreini and Nicertini, while comb.n.; H. fellea (Yang & Wu, 1993), comb.n., H. subfamily Otiocerinae include the tribes: Kamendakini, glutinosa (Yang & Wu, 1993), comb.n., H. idonea (Yang Rhotanini, Otiocerini, Patarini, Neocyclocarini, Phenici- et Wu, 1993), comb.n., Muiredusa brunnea (Muir, 1914), ni, Zoriaidini, Sikaianini and recently described [Ba- comb.n., M. littorea (Yeh & Yang, 1993), comb.n., M. naszkiewicz & Szwedo, 2005] tribe Aquaeliciini. Accor- ignota (Yeh & Wu, 1993), comb.n., Produsa concava ding to Emeljanov [1995], the taxa placed in the tribe (Yang & Wu, 1993), comb.n. и P. cubica (Yang & Wu, Mysidiini, proposed by Broomfield [1985], are to be 1993), comb.n. Дана определительная таблица родов, placed within Derbini. помещённых в трибу Cedusini, и обсуждены поло- The Eocene Baltic amber inclusions of Derbidae жение и родственные отношения ископаемого рода comprise only Positrona shcherbakovi Emeljanov, 1994, в пределах трибы. of the tribe Otiocerini [Emeljanov, 1994] and Lugeilan- 328 Jacek Szwedo gor elektrokleistis Szwedo, 2005 [Szwedo, 2005] of the sometimes convex, concave, or subparallel to the outer tribe Otiocerini are known. Unnamed representatives of ventral margin, [Flynn & Kramer, 1983; Kramer, 1983]. the tribe Cedusini mentioned by Szwedo [2002] are de- One species, Cedusa wolcotti Muir, 1924 seems not to scribed below. From Oligocene/Miocene resins of the be congeneric with the other American species ascribed New World more taxa are described. Derbidae inclu- to Cedusa, as it is the only member of the genus with sions described from Dominican amber are: Cedusa the posterior prolongation of the pygofer and is very credula Emeljanov & Shcherbakov, 2000, of the tribe unique possessing a ventral plate [Caldwell & Mar- Cedusini and Dysimia imprudens Emeljanov & torell, 1951, Flynn & Kramer, 1983]. It seems that the Shcherbakov, 2000 of the tribe Derbini [Emeljanov & genus Cedusa is a paraphyletic unit, and needs to be Shcherbakov, 2000]. Inclusions recorded in Mexican revised, as well as other taxa placed in Cedusini. amber are: Cedusa baylissae Szwedo & Ross, 2003 of the tribe Cedusini [Szwedo & Ross, 2003] and Co- The following key could be used for delimitation of pallinges chiapasensis Szwedo, 2004 of the tribe Cen- genus-level taxa ascribed to Cedusini. chreini [Szwedo, 2004]. A few other unnamed Derbidae 1.Tegmen with joined claval veins Pcu+A1 reaching commis- are known from Oligocene/Miocene Dominican amber sural margin of tegmen, reaching vein A2. Tegmen with — specimens figured in Poinar & Poinar [1999] and branches of stem of the vein M forming anterior comb2 –.Tegmen with joined claval veins Pcu+A reaching claval Eocene Bitterfeld amber [Szwedo, 2002]. Mysidioides 1 migdisovae Emeljanov, 2002, of the tribe Otiocerini has suture, reaching vein CuP, near apex of clavus. Tegmen with branches of stem of the vein M forming posterior been described by Emeljanov [2002] from Miocene stra- comb.............................................................................7 ta of Stavropol’ (Northern Caucasus Mts.) The record 2.Wing with vein ScRA1 very short, reaching anterior margin of Derbidae from Upper Triassic strata of Brazil [Pinto, near wing coupling apparatus......................................3 1956] is based on misinterpreted material [Emeljanov, –.Wing with vein ScRA1 long, reaching anterior margin near 1994; Szwedo, 2002; Szwedo et al., 2004]. This fossil its apex..................................... Emeljanovedusa gen.n. known as Sanctipaulus mendesi Pinto, 1956, has been 3.Transversely oblique carina across the gena distinct from transferred to Trichoptera, undetermined family, by the subantennal process, as long as basal width of the Martins-Neto et al. [2003]. process. Antennal pedicel about as long as wide, slightly flattened. Genital styles asymmetrical, New World spe- cies......................................................... Cedusa Fowler Taxonomy type species: Cedusa funesta Fowler, 1904: 103; by subse- quent designation by Muir 1913: 35. –.Genital styles symmetrical, Old world species...........4 The tribe Cedusini could be characterized as fol- 4.Transversely oblique carina across the gena between the lows: head and tegmina without sensory pits, apical subantennal process and lateral carina of frons not longer segment of rostrum distinctly longer than wide, female than half of the basal width of the process, confluent with with abdominal sternite VII not fused with abdominal the process as a broad flange. Tegmen with veins Sc+R fork tergite VIII. The last feature is of particular interest as, basad of claval veins junction, fork of vein CuA at level fusion of the sternite VII with tergite VIII is believed to claval veins junction. Antennal pedicel about twice as long be synapomorphy for all Derbidae, with exception of as wide. African and Palaearctic species........................ Cedusini and Derbini [Emeljanov 1992a]. According to ................................................................ Malenia Haupt Emeljanov [1995] the tribe Cedusini comprises three type species: Lamenia bosnica Horváth, 1907: 322; by original designation by Haupt 1929: 194. genera: Cedusa Fowler, 1904, Melusa Emeljanov, 1995, –.Transversely oblique carina across the gena between sub- and Eocenchrea Muir, 1913. The taxonomic status of antennal process and lateral carina of frons indistinct. Anal the genus Malenia Haupt, 1929 (synonym of Cedusa or tube not distinctly elongated, about twice as long as wide, distinct genus) remained controversial for a long time. usually with apex not reaching level of apex of genital Fennah [1961] discriminated those two genera on the styles. Oriental species................................................5 basis of venation features. Yang & Wu [1993] separat- 5.Genital styles slender, dorsobasal projection basad. Hind ed Taiwanese species ascribed to genera Cedusa and leg tibiotarsal spinal formula 6 : 5 : 5...........................6 Malenia on the basis of hind leg femorotarsal formula –.Genital styles short and stout, dorsobasal projection and structure of the male genital block. All African distad. Hind leg tibiotarsal spinal formula 7 : 6 : 5. Anal style of male turned ventrad or nearly so, slightly