Latest Articles from Arthropod Systematics & Phylogeny Latest 6 Articles from Arthropod Systematics & Phylogeny https://arthropod-systematics.arphahub.com/ Thu, 28 Mar 2024 20:00:41 +0200 Pensoft FeedCreator https://arthropod-systematics.arphahub.com/i/logo.jpg Latest Articles from Arthropod Systematics & Phylogeny https://arthropod-systematics.arphahub.com/ Paraphyly of the subgenus Micronecta (Micronecta) Kirkaldy, 1897 (Hemiptera: Heteroptera: Micronectidae) based on mitochondrial genomes and nuclear rDNAs https://arthropod-systematics.arphahub.com/article/108906/ Arthropod Systematics & Phylogeny 82: 77-87

DOI: 10.3897/asp.82.e108906

Authors: Bao-Jun Xie, Ping-Ping Chen, Jakob Damgaard, Jie-Yi Xie, Qiang Xie, Yan-Hui Wang

Abstract: The genus Micronecta Kirkaldy, 1897 is the most species-rich genus in the family Micronectidae, containing more than 160 species. Micronecta is currently divided into 11 subgenera, five of which are monotypic. Moreover, the subgenus Micronecta is an empirical mixture group. The definitions of some subgenera were based on only a few aberrant morphological features, which are specializations with few phylogenetic significances. The relationship between these subgenera remains unclear. In this study, we newly sequenced mitochondrial genomes (mitogenomes) and nuclear rDNAs (nrDNAs) for 13 Micronecta species, representing seven subgenera, and those for ten other water bugs. Our phylogenetic analyses showed that the subgenus Lundbladella represents the sister group to all other studied subgenera of Micronecta. The subgenus Unguinecta was the sister group to the clade that contains Dichaetonecta and Sigmonecta. More importantly, the subgenus Micronecta represents a paraphyletic group, which further forms a monophyletic group together with the subgenera Basileonecta and Ctenonecta. This is for the first time that the phylogeny of the genus Micronecta was investigated based on molecular data and the paraphyly of the subgenus Micronecta was revealed. Such evidence suggested the necessity of the revision of the taxonomic system of the genus in the future, and may also serve as a reference for the delimitation of subgeneric characters.

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Research Article Mon, 18 Mar 2024 18:52:53 +0200
Plant bugs with swollen antennae: a morphology-based phylogenetic analysis of Heterocapillus Wagner, 1960 and related genera (Hemiptera: Miridae: Phylinae) https://arthropod-systematics.arphahub.com/article/104396/ Arthropod Systematics & Phylogeny 81: 845-879

DOI: 10.3897/asp.81.e104396

Authors: Fedor V. Konstantinov

Abstract: Plant bugs of the genus Heterocapillus (Miridae: Phylinae) are predominantly Mediterranean minute black phylines with distinctly swollen antennomeres I and II. The monophyly and relationships of this group has been questioned in several studies. This paper provides a morphology-based phylogeny inferred with Parsimony and Bayesian analyses of the genus and a diverse array of outgroups. Based on these results, Heterocapillus is here redefined as monotypic. A new monotypic genus Abietocapsus gen. nov. is erected to accommodate Phoenicocoris dissimilis (Reuter, 1878) and updated diagnoses are provided for the genera Lobicris Putshkov, 1977 gen. dist., Mesopsallus Wagner, 1970 gen. dist., and Salicarus Kerzhner, 1962. The following new combinations are established: Campylomma atlanticum (Wagner, 1963) comb. nov., Campylomma pusillum (Reuter, 1878) comb. nov., Mesopsallus amygdali (Wagner, 1960) comb. nov., Mesopsallus fagi (Drapolyuk, 1990) comb. nov., Mesopsallus mali (Meyer-Dür, 1843) comb. nov., Mesopsallus pici (Reuter, 1899) comb. nov., Mesopsallus rhodani (Fieber, 1861) comb. nov., Mesopsallus validus (Reuter, 1901) comb. nov., Psallus (Phylidea) validicornis (Reuter, 1876) comb. nov., Salicarus cavinotum (Wagner, 1973) comb. nov., Salicarus genistae (Lindberg, 1948) comb. nov., Salicarus nitidus (Horváth, 1905) comb. nov., and Salicarus perpusillus (Wagner, 1960) comb. nov. Atractotomus schmiedeknechti Reuter, 1899 is synonymized with Atractotomus parvulus Reuter, 1878. Heterocapillus niger Wagner, 1966 is synonymized with Psallus (Phylidea) validicornis (Reuter, 1876). The highly homoplastic nature of the antennal shape in phylines is demonstrated, suggesting against using these features as diagnostic at the generic level.

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Research Article Thu, 9 Nov 2023 16:35:04 +0200
Taxonomic revision and phylogeny of the sharpshooter genus Dasmeusa Melichar, 1926, with a scanning electron microscopy study of D. pauperata (Fabricius, 1803) (Hemiptera: Cicadellidae: Cicadellini) https://arthropod-systematics.arphahub.com/article/102848/ Arthropod Systematics & Phylogeny 81: 655-687

DOI: 10.3897/asp.81.e102848

Authors: Nathalia H. Pecly, Daniela M. Takiya, Rodney R. Cavichioli, Gabriel Mejdalani

Abstract: The genus Dasmeusa is distributed in Northern and Northeastern Brazil and the Guianas. Until the present study, six species were recognized within Dasmeusa. The species of this genus are very similar in terms of color and external morphology, being distinguished mainly by the male terminalia. Here, we review and redescribe Dasmeusa and its species, describe four new species, and present the first phylogenetic analysis of the genus, including 40 morphological characters and 15 terminal taxa. Dasmeusa flavescens Metcalf and Erythrogonia bicolor Metcalf are considered junior synonyms of the type-species, Dasmeusa pauperata (Fabricius). Scanning electron microscopy was employed for a detailed study of the integument of the type-species, including sensilla, surface sculpturing, brochosomes, organ of Evans, and other structures. The phylogenetic analysis with equal weights resulted in nine most parsimonious trees. The implied weighting method resulted in two trees, both with the same ingroup topology as observed in one of the nine equal-weights trees. This preferred topology is as follows: ((D. basseti (D. mendica (D. rafaeli sp. nov., D. falcifera sp. nov.))) (D. isabellina (D. oriximina sp. nov. (D. pauperata (D. imperialis, D. dinizi sp. nov.))))). Dasmeusa was recovered as monophyletic in all trees, being supported by five apomorphic characters.

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Research Article Tue, 1 Aug 2023 14:36:35 +0300
Phylogenetic analysis and revision of the leafhopper genus Acuera DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini) based on morphological data https://arthropod-systematics.arphahub.com/article/81961/ Arthropod Systematics & Phylogeny 81: 79-164

DOI: 10.3897/asp.81.e81961

Authors: Alexandre Cruz Domahovski, Rodney Ramiro Cavichioli

Abstract: Based on a phylogenetic analysis using implied weighting for 59 taxa and 155 morphological characters, we provided a taxonomic revision for Acuera. The genus was recovered as polyphyletic; herein we described three new genera and 16 new species, and proposed 23 new combinations, a new status and four new synonyms for Gyponini. Coarctana gen. nov. is described to include 15 species: C. rana (DeLong & Freytag) comb. nov. (type species) transferred from Acuera; five species transferred from Curtara, C. apena (DeLong & Freytag) comb. nov., C. pedica (DeLong) comb. nov., C. punctata (Spångberg) comb. nov., C. secara (DeLong & Triplehorn) comb. nov., and C. serpenta (DeLong) comb. nov.; and nine new species, C. asymmetrica sp. nov., C. glabra sp. nov., C. nigromedia sp. nov., C. occultata sp. nov., C. oricula sp. nov., C. parvula sp. nov., C. striata sp. nov., C. taurina sp. nov., and C. vilavelha sp. nov. Effossana gen. nov. includes eight species: two species transferred from Acuera, E. gloma (DeLong & Freytag) comb. nov. (type species) and E. fructa (DeLong & Freytag) comb. nov.; two species transferred from Curtara, E. gatuna (DeLong & Wolda) comb. nov. and E. scapa (DeLong) comb. nov.; and four new species, E. assimulata sp. nov., E. circumnota sp. nov., E. intrinseca sp. nov., and E. tenuemarginata sp. nov. A new monotypic genus, Propincurtara gen. nov., is described to include P. longilinea sp. nov. The subgenus Parcana is raised to genus rank, comprising nine species: P. atitlana (Fowler) comb. nov., P. concilia (DeLong & Freytag) comb. nov., P. extara (DeLong & Freytag) comb. nov., P. mimica (DeLong & Freytag) comb. nov., P. spreta (Fowler) comb. nov., and P. ultima (DeLong & Freytag) comb. nov. (type species); also three species transferred from Curtara, P. albororata (Fowler) comb. nov., P. animosa (DeLong & Freytag) comb. nov., and P. ventusa (DeLong & Freytag) comb. nov. Curtara lineatana DeLong & Freytag is a junior synonym of P. concilia (DeLong & Freytag) comb. nov., Acuera inlustra DeLong & Freytag is a junior synonym of Hamana manifesta DeLong, and A. culmena DeLong & Freytag and A. prodiga DeLong & Freytag are synonyms of A. menaca DeLong & Freytag. Four species of Acuera are transferred to Curtara: C. facera (DeLong & Freytag) comb. nov., C. labella (Osborn) comb. nov., C. nama (DeLong & Freytag) comb. nov., and C. patula (DeLong & Freytag) comb. nov. Two new species, A. extenuata sp. nov. and A. umbra sp. nov. are described and placed in the subgenus Acuera. We provide descriptions and illustrations of the new taxa, redescription of the type species of the genera Acuera, Coarctana gen. nov., Effossana gen. nov., and Parcana stat. nov., 40 new country and Brazilian states records, and key to males of each genus.

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Research Article Fri, 20 Jan 2023 17:35:59 +0200
Total evidence analysis elucidates the tangled systematic scenario within Fidicinini (Hemiptera: Auchenorrhyncha, Cicadidae) https://arthropod-systematics.arphahub.com/article/85755/ Arthropod Systematics & Phylogeny 81: 35-77

DOI: 10.3897/asp.81.e85755

Authors: Tatiana Petersen Ruschel, Filipe Michels Bianchi, Luiz Alexandre Campos, Gervásio Silva Carvalho

Abstract: The Linnean, Wallacean, and Darwinian shortfalls are knowledge gaps about species taxonomy, distribution, and evolution, respectively. Fidicinini is a tribe of cicadas that suffers from these gaps. We assessed specimens of the tribe sharing similar male genital shape (uncus), but fitting the somatic morphology of either Dorisiana Metcalf, 1952 and Guyalna Boulard & Martinelli, 1996. We build a phylogenetic hypothesis by total evidence analysis and perform a character optimization of the uncus and timbal cover shapes, the last used as diagnostic for both genera. Dorisiana and Guyalna were recovered non-monophyletic. A new genus, Acanthoventris gen. nov., and ten new species are proposed: A. charrua Ruschel sp. nov., A. claudiae Ruschel sp. nov., A. faustopsaltrius Ruschel sp. nov., A. iara Ruschel sp. nov., A. igneus Ruschel sp. nov., A. olivarius Ruschel sp. nov., A. phoenix Ruschel sp. nov., A. rubemi Ruschel sp. nov., A. tumidus Ruschel sp. nov., and A. viridinotatus Ruschel sp. nov.; and three new combinations A. densusus (Boulard & Martinelli, 2011) comb. nov., A. drewseni (Stål, 1854) comb. nov., and A. jauffreti (Boulard & Martinelli, 2001) comb. nov. We provide illustrated identification keys, occurrence maps, and discuss the distribution of the species in the new genus.

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Research Article Fri, 20 Jan 2023 11:08:36 +0200
Phylogenetic analysis of the Belostoma plebejum group sensu Nieser (Insecta, Hemiptera, Belostomatidae): the effect of adding continuous characters on its accuracy https://arthropod-systematics.arphahub.com/article/87378/ Arthropod Systematics & Phylogeny 81: 1-34

DOI: 10.3897/asp.81.e87378

Authors: José R. I. Ribeiro, Augusto Ferrari

Abstract: The Belostoma plebejum group comprises nine species, and the most evident characteristic shared by all species of the group is a phallus that is strongly curved ventrally. The difficulty in studying its species is much aggravated by the scarcity of identified material in Brazilian collections, and this has negatively impacted phylogenetic studies within the group. We tested the monophyly of the B. plebejum group using discrete and continuous characters under different weighting schemes and inferences. We described B. lanemeloi sp. nov. and B. nieseri sp. nov. and they served as the basis to study the phylogenetic relationships. A strict-consensus tree recovered under maximum parsimony and with implicit weighting scheme is as follows: (B. parvum, ((B. lanemeloi sp. nov., (B. nessimiani, B. nieseri sp. nov.)), (B. micantulum var1, (B. micantulum var2, (B. estevezae, ((B. plebejum, (B. minusculum var1, B. minusculum var2)), ((B. nicaeum var1, B. nicaeum var2), ((B. lariversi var1, B. lariversi var2), (B. pygmeum var1, B. pygmeum var2))))))))). The monophyly of the B. plebejum group is corroborated by four non-homoplastic synapomorphies, and the aforementioned condition of the phallus is one of them. We tested the phylogenetic integrity of some species of the B. plebejum group, and only the exemplars of B. micantulum did not constitute monophyletic clades. Comparing the topologies obtained by different approaches clearly showed the presence of different scenarios in terms of heterogeneity of evolutionary rates among characters, but this could also be influenced by the disproportionate number of discrete characters compared with continuous characters.

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Research Article Mon, 16 Jan 2023 13:46:40 +0200