A new species of Cosmetidae belonging to the genus Metavononoides Roewer, 1928 is herein described. Metavononoides renneri sp.nov. is clearly recognized by its distinctive tarsal formula, by the ratio length/width of dorsal scutum, and by its characteristic color pattern. The new species is the thirteenth species included in the genus. It is known only from the type locality, Bom Jesus do Norte, Alto da Torre, Espírito Santo, Brazil.Uma nova espécie de Cosmetidae pertencente ao gênero Metavononoides Roewer, 1928 é descrita. Metavononoides renneri sp.nov. é claramente reconhecida por sua fórmula tarsal, pela relação comprimento/largura do escudo dorsal, e pelo seu padrão de cores. A nova espécie é a décima terceira espécie do gênero. A localidade tipo é Bom Jesus do Norte, Alto da Torre, Espírito Santo, Brasil, havendo registro apenas nesse local

Ferreira, Cláudio P.

Kury, Adriano B.

Pedroso, Denis Rafael

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1 Submitted on October 21, 2005. Accepted on July 4, 2006.2 Museu Nacional/UFRJ, Departamento de Invertebrados. Quinta da Boa Vista, São Cristóvão, 20940-040, Rio de Janeiro, RJ, Brasil.3 E-mail: cppires@gmail.com.4 E-mail: drbpedroso@gmail.com.5 E-mail: adrianok@gmail.com.Arquivos do Museu Nacional, Rio de Janeiro, v.64, n.3, p.231-234, jul./set.2006ISSN 0365-4508A NEW SPECIES OF METAVONONOIDES FROM SOUTHERN ESPÍRITOSANTO, BRAZIL (ARACHNIDA: OPILIONES: COSMETIDAE) 1(With 6 figures)CLÁUDIO P. FERREIRA 2, 3DENIS RAFAEL PEDROSO 2, 4ADRIANO B. KURY 2, 5ABSTRACT: A new species of Cosmetidae belonging to the genus Metavononoides Roewer, 1928 is hereindescribed. Metavononoides renneri sp.nov. is clearly recognized by its distinctive tarsal formula, by the ratiolength/width of dorsal scutum, and by its characteristic color pattern. The new species is the thirteenthspecies included in the genus. It is known only from the type locality, Bom Jesus do Norte, Alto da Torre,Espírito Santo, Brazil.Key words: Laniatores, Taxonomy, Rio de Janeiro, Neotropical, WWF Ecoregion NT0104.RESUMO: Uma nova espécie de Metavononoides da Mata Atlântica (Arachnida: Opiliones: Cosmetidae).Uma nova espécie de Cosmetidae pertencente ao gênero Metavononoides Roewer, 1928 é descrita. Metavononoidesrenneri sp.nov. é claramente reconhecida por sua fórmula tarsal, pela relação comprimento/largura do escudodorsal, e pelo seu padrão de cores. A nova espécie é a décima terceira espécie do gênero. A localidade tipo éBom Jesus do Norte, Alto da Torre, Espírito Santo, Brasil, havendo registro apenas nesse local.Palavras-chave: Laniatores, Taxonomia, Rio de Janeiro, Neotropical, Eco-região WWF NT0104.INTRODUCTIONThe genus Metavononoides Roewer, 1928 currentlyincludes twelve species, distributed in the AtlanticForest of eastern Brazil (KURY, 2003; FERREIRA, et al.,2005). This genus can be recognized by the presenceof a U-shaped drawing (similar to a lyre) on thedorsal scutum, body length 5 to 7mm, long legs (legII reaching more than 30mm in the smaller species),depressed mesotergum, a pair of median spines inthe area III and a bifid dorso-basal apophysis incoxa I (KURY, 2003).In this paper a new species of Metavononoides fromthe Atlantic Forest is described and some informationon its habitat and distribution is given. Depositoriesof the specimens cited are Museu Nacional,Universidade Federal do Rio de Janeiro (MNRJ) andSenckenberg Museum, Frankfurt (SMF). Allmeasurements are in mm. Legs measurements followthe pattern: Total (Trochanter / Femur / Patella / Tibia/ Metatarsus / Tarsus). Pedipalpus measurementsfollow the pattern:  Total (Trochanter/  Femur / Patella/ Tibia / Tarsus / Claw). Tarsal formula (number oftarsomeres) of left and right legs is given as follows: I–I,II–II, III–III, IV–IV. Numbers of total tarsal count of legsI-II are followed by the distitarsal count in parentheses.Descriptions of colors use the standard names of the267 Color Centroids of the NBS/IBCC Color System(http://www.anthus.com/Colors/Cent.html).Metavononoides renneri sp.nov.(Figs.1-6)Holotype – Adult  (MNRJ 6178), RennerL.C.Baptista col., 3/XI/1984.Type-locality – Bom Jesus do Norte (21°08’S,41°41’W), Alto da Torre, Espírito Santo State, Brazilon the forest ground.Paratypes (same locality and collector) – 1 adult ,2 adult  (MNRJ 6178), all brittle, as the holotype.Etymology – Species name is an genitive referringto our friend arachnologist Renner Luiz CerqueiraBaptista who also collected the type series and onlymaterial known of the species.232                          C.P.FERREIRA, D.R.PEDROSO & A.B.KURYArq. Mus. Nac., Rio de Janeiro, v.64, n.3, p.231-234, jul./set.2006Distribution – Known only from the type locality.WWF Ecoregion NT0104 (Bahia interior forests) ofthe biome Tropical & Subtropical Moist BroadleafForests. It is not known if this reflects a collectingartifact caused by insufficient sampling of the regionand rarity (low abundance) of the species or to trueendemism. But a strong degree of presumableendemism is known to occur in many genera ofGonyleptoidea, including Cosmetidae (KURY, 2003).Besides the differences in morphology and colorpattern, M. renneri is allopatrid to all other speciesof Metavononoides, based on the known records.Diagnosis – Metavononoides renneri can be separatedfrom the others in the genus by 1) the unique tarsalformula 6(3), 15(3), 8, 9 (in all other species, a lowtarsal count such as 6 on leg I corresponds to lowcounts such as up to 13 in leg II and 7 in legs III-IV),2) drawings on the dorsal  scutum restricted to areaI and to the margins of area III (in all other speciespigmentation is more extensive), 3) the spines of areaIII concolorous with the dorsum (this stronglycontrasts with the black spine of e.g. M.melanacanthus Ferreira, Pedroso & Kury, 2005 andothers), and 4) the coxa IV visible in all its extensionbeyond the scutum in dorsal view (coxa IV is visibleonly in its distal portion in many species). Also 5) theratio length/width of dorsal scutum is unique withinthe genus, with width near length instead of lengthmuch larger than width typical of the other speciesin the genus. See Discussion for more comparisons.DESCRIPTION OF  HOLOTYPEBody – Measurements in table 1. Ventral and dorsalgranulation reduced, similar to that ofMetavononoides barbacenensis (Mello-Leitão, 1923).Anterior border of dorsal scutum smooth, withcheliceral sockets moderately deep, with one largeacuminate projection on each side, both projectionssubparallel. Median projection (between chelicerae)similar to lateral projections, slightly blunter.  Lateralmargins of dorsal scutum with a longitudinal row ofminute granule besides areas II-IV. Posterior marginof dorsal scutum (area V) short, with minute scatteredgranules, its border only slightly concave. Eye moundlow, smooth, saddle-shaped, clearly visible in dorsalview. Dorsal scutum swollen in its abdominal portion,lateral margins converging posteriorly so thatposterior corners form an obtuse angle. Grooves ofscutum not clearly marked, except for the scutalgroove, which defines the carapace. Mesotergal areasnot recognizable, but paired armature by topologyseems to correspond to area III. Maximum width ofscutum anterior to area III. Scutal areas and tergitesunarmed, except area III, armed with a pair of highacuminate spiniform projections (both broken in theholotype), slightly divergent, with granular base. Freetergites with a transverse row of minute granules.Free sternites unarmed. Dorsal anal operculum witha pair of small spines.Chelicera – Bulla of basichelicerite bordered withlarge acute granules all around. Cheliceral handsmooth and unarmed.Pedipalpus – Measurements in table 1. Femurflattened and concave ventrally. Tibia spoon-shaped, with two marginal rows of small setae.Legs – Measurements of legs I-IV in table 1.Podomeres unarmed, except coxae. Tarsal counts:6-6(3), 15-15(3), 8-8, 9-9.  Coxa I with prolatero-dorsal apophysis large and bifid, retrolatero-dorsalapophysis reduced. Coxa II-III with one prolatero-dorsal apophysis each. Coxa IV barely visible in allits extension beyond scutum in dorsal view. Withtwo prolateral-dorsal apophyses close together.Penis – Ventral plate subrectangular a little widerat apex, apical border slightly concave. Two pair ofunequal apical setae moderately long and curved.Three pairs of smaller latero-medial setae, the distaltwo pairs shorter and straight insertedtransversally, proximal pair curved, oblique. Glanswith thumb-like dorsal process. Stylus with apexswollen, glans with hyaline serrate crest.TOTAL LENGTH: 3.41 TOTAL WIDTH: 3.36 Carapace length: 1.23 Carapace width: 2.23 Pedipalpus 4.16 (0.68/1.26/0.47/1.05/0.44/0.26) Leg I 13.19 (0.41/3.80/0.72/2.18/3.90/2.18) Leg II 31.01 (0.56/8.37/1.12/6.75/9.44/4.77) Leg III 17.71 (0.66/5.66/0.93/2.93/5.33/2.20) Leg IV 26.77 (0.56/8.43/1.12/4.43/9.18/3.05) TABLE 1. Male holotype of Metavononoides renneri sp.nov. measurements of body and appendages.                                 A NEW SPECIES OF  METAVONONOIDES  FROM SOUTHERN ESPÍRITO SANTO, BRAZIL                                          233Arq. Mus. Nac., Rio de Janeiro, v.64, n.3, p.231-234, jul./set.2006Color in alcohol – Background of dorsal scutum,spiniform apophyses of area III and appendagesdeep orange (centroid 51), central portion ofmesotergum, region around the spines andcarapace a little lighter. A yellowish white(centroid 92) irregular stripe runs along scutalgroove. All surface of scutum with disperseyellowish white round spots. Central region ofscutum with longitudinal row of four yellowishwhite round spots reaching from area I to IVpassing between spines of area III. Such spotsalso present laterally to eye mound, forming acircle around the spines of area III and along theposterior border of dorsal scutum.Variation (females, n =2) – Tarsal formula: 6 (3),14-15 (3), 8, 9.Female – Similar to male. Armature of cheliceralbulla much smaller. Anal operculum unarmed.Measurements of body and leg II in table 2.Metavononoides renneri sp.nov. Male holotype (MNRJ 6178) from Bom Jesus do Norte: fig.1- habitus, dorsal view, fig.2-same, lateral view. Scale bars = 1mm.TOTAL LENGTH: 3.30  TOTAL WIDTH: 3.5 Carapace length: 1.23 Carapace width: 2.34 Leg II 31.79 (0.56/8.81/1.06/7.37/9.68/4.31) TABLE 2. Female paratype of Metavononoides renneri sp.nov. measurements of body and leg II.1 2234                          C.P.FERREIRA, D.R.PEDROSO & A.B.KURYArq. Mus. Nac., Rio de Janeiro, v.64, n.3, p.231-234, jul./set.2006DISCUSSIONRegarding external morphology, M. renneriresembles at closest Metavononoides preciosus(Roewer, 1928), also distributed north of ParaíbaRiver, in the Eco-Region NT0104. Metavononoidespreciosus can be distinguished by the deepercheliceral socket and presence of a socket in thelocking area of leg I, absent in M. renneri .Pigmentation of M. preciosus consists of two sets ofpaired white spots, a pair of irregular stripes atanterior margin of carapace, and a pair of stripesclose to the carapace. The latter differs from thecorresponding stripes of M. renneri. The white dotsare much scarcer in M. preciosus than in M. renneri.Coxa IV of M. renneri can be seen dorsally allover itslength while in M. preciosus it is visible only in theapical portion. Dorsal scutum measurements of themale holotype (single specimen available for thisstudy) of M. preciosus (SMF) are: totallength 3.12, carapace length 1.08, total width2.88, carapace width 1.95. Another speciesgeographically close is M. melanacanthus, recentlydescribed from northern Rio de Janeiro State,south of River Paraíba in the Eco-Region NT0160(FERREIRA et al., 2005). Metavononoides renneri canbe distinguished from it by the deeper cheliceralsocket; spiniform apophyses of area IIIconcolorous instead of contrasting black, muchless evident white drawing of scutum, and smallertubercles of dorsal anal opercle.Male genitalia of M. renneri are, however, moresimilar to those of M. melanacanthus. Most evidentdifference being the distal border of ventral plate,which is dorso-ventrally  thickened in M. renneri.Morphology of male genitalia of M. preciosusfollows closely that of M. renneri, excepted thesecond basalmost pair of setae of ventral platewhich is subequal to the first and third.REFERENCESKURY, A. 2003. Annotated catalogueof the Laniatores of the New World(Arachnida, Opiliones). RevistaIbérica de Aracnología, volumenespecial, 1:1-337.FERREIRA, C.P.; PEDROSO, D.R. &KURY, A.B., 2005. A new species ofMetavononoides from the BrazilianAtlantic Forest (Arachnida: Opiliones:Cosmetidae). Zootaxa, 1087:45-52.MELLO-LEITÃO, C.F. de, 1923.Opiliones Laniatores do Brasil.Archivos do Museu Nacional,24:107-197.ROEWER, C.F., 1928. WeitereWeberknechte II. (2. Ergänzungder Weberknechte der Erde,1923).  Abhandlungen derNaturwissenschaftlichen Vereinzu Bremen ,  26 (3 ) :527-632.[Nominal date is 1927. Publicationdate is February 1928].Metavononoides renneri sp.nov. Male holotype (MNRJ 6178) from Bom Jesus doNorte: fig.3- tarsi of anterior leg I, fig.4- tarsi or anterior leg II. Scale bars = 1mm;fig.5- distal part of penis, ventral view, fig.6- distal part of penis, lateral view.Scale bars = 0.1mm.345 6

Uma nova espécie de Metavononoides da Mata Atlântica (Arachnida: Opiliones: Cosmetidae)

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Uma nova espécie de Metavononoides da Mata Atlântica (Arachnida: Opiliones: Cosmetidae)

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