Zootaxa

**Integrative taxonomic analysis of the Pseudothelphusa americana de Saussure, 1857 species complex with the description of three new species (Decapoda, Pseudothelphusidae, Pseudothelphusinae)**

2025-07-01T10:46:12+12:00

The Neotropical freshwater crab, Pseudothelphusa americana de Saussure, 1857, has historically been an unstable taxon. New collections from the published range of P. americana indicate a great deal of morphological variation within this taxon, suggesting that it may be a species complex. In the present study we describe three new species within the P. americana complex based on a phylogenetic analysis, on a study of the morpho-geometric variation of the gonopod, and on a thorough morphological revision of somatic and sexual structures. Three new species (P. chilapaensis sp. nov., P. hermosorum sp. nov., and P. queretana sp. nov.) are described, and P. americana sensu stricto is redescribed, a neotype designated and its revised geographic distribution mapped.

Oedionychina (Coleoptera: Chrysomelidae: Galerucinae: Alticini) from the Parque Estadual Altamiro de Moura Pacheco, a Cerrado remnant

2025-07-01T10:47:06+12:00

Oedionychina Chapuis, 1875 is a large group of flea beetles that have been the subject of several taxonomic studies in recent years. Here, we present data on external morphology and genitalia of six species of Oedionychina from the Brazilian Cerrado. High-quality photos are included. We update descriptions of three known species, Alagoasa burmeisteri (Harold, 1881), Omophoita magniguttis Bechyně, 1955, and Paranaita opima (Germar, 1824), and describe three new species, O. mateusi sp. nov., Walterianella marae sp. nov., and Walterianella tapuiae sp. nov. The specimens were sampled at the Parque Estadual Altamiro de Moura Pacheco (PEAMP), Goiás, Brazil, a remnant of Cerrado mostly covered by semi-deciduous forest. These updates are part of our ongoing efforts to elucidate the diversity of Oedionychina in the Cerrado.

Three new species of the shrimp family Alpheidae from the south-western Indian Ocean (Decapoda: Caridea)

2025-07-01T10:47:59+12:00

Three morphologically distinct new species of the caridean shrimp family Alpheidae are described, based on material collected in the south-western Indian Ocean. Arete cornutus sp. nov. is described based on several specimens of both sexes from southern and south-western Madagascar. This new species appears to be closest to A. acanthocarpus Miya & Miyake, 1968, differing from it and all other congeners by the presence of prominent supra-orbital teeth. Synalpheus gloriosus sp. nov. is described on the basis of a single female holotype from Îles Glorieuses collected in the mesophotic zone at a depth range of 80–147 m. One of the main diagnostic characters of S. gloriosus sp. nov. is the presence of a dense brush of gambarelloid setae on the minor cheliped, a very uncommon feature among Indo-West Pacific species of the genus Synalpheus Spence Bate, 1888. Finally, Alpheus ledoyeri sp. nov. from the A. brevirostris (Olivier, 1811) species group is described based on a single male holotype collected in north-western Madagascar in 1960.

**Redescription of Kalligramma haeckeli Walther, 1904 (Neuroptera: Kalligrammatidae), a Jurassic paleontological icon, allows the redefinition of Kalligrammatinae**

2025-07-01T11:02:52+12:00

Kalligramma haeckeli Walther, 1904, the type species of the genus, is re-described based on the holotype. We find that its hind wing CuP is deeply forked. Based on this and other shared character states, Kalligrammula Handlirsch, 1919, syn. nov., and Limnogramma Ren, 2003, syn. nov., are considered subjective synonyms of Kalligramma Walther, 1904, and Oregrammatinae a synonym of Kalligrammatinae, syn. nov. The Kalligrammatinae now include Kalligramma, Sinokalligramma Zhang, 2003, Oregramma Ren, 2003, sit. nov., Abrigramma Yang et al., 2014b, sit. nov., and probably Makarkinia Martins-Neto, 1992. Only four subfamilies are well defined and valid in Kalligrammatidae, i.e., Kalligrammatinae, Liassopsychopinae, Sophogrammatinae, and Kallihemerobiinae. The kalligrammatid affiliation of Cretanallachiinae and the validity of Meioneurinae are questionable.

Three new species of Stactobiinae (Trichoptera: Hydroptilidae), new distributional records, and an updated checklist for Brazil

2025-07-01T11:03:50+12:00

Stactobiinae comprise 479 species worldwide. In Brazil, only 15 species have been reported, most of which are endemic to the Amazon rainforest and Atlantic Forest. In this work we provide the description and illustration of three new species from Brazil, two in the genus Flintiella and one in the genus Orinocotrichia. Flintiella angrisanoae sp. nov. differs from congeners by the inferior appendages being long and slightly sinuous and the phallic apex is divided into two asymmetrical lobes, with an ejaculatory duct protruding mesally. Flintiella quiteriae sp. nov. can be recognized by the phallic apex being deeply divided into two lobes, both curved to the right, with the left lobe overlapping the right. Orinocotrichia costae sp. nov. differs from congeners by truncated processes of segment IX and inferior appendages each with an anteroposterior membranous projection that narrows at the apex. We also are providing an updated checklist for Brazil, with new distribution records for seven Stactobiinae species: Bredinia espinosa Harris, Holzenthal & Flint 2002c; Flintiella andreae Angrisano 1995; F. astilla Harris, Flint & Holzenthal 2002b; F. boraceia Harris, Flint & Holzenthal 2002b; F. triaena Gama Neto, Ribeiro & Passos 2020, F. manauara Santos & Nessimian 2009, and F. pizotensis Harris, Flint & Holzenthal 2002b. Additionally, new illustrations and taxonomic comments are provided for F. triaena.

Rhionaeschna caligo revisited: female and larval descriptions, new geographical records and natural history notes (Odonata: Aeshnidae)

2025-07-01T11:04:40+12:00

The species Rhionaeschna caligo Bota-Sierra, 2014, endemic to the páramos of the northwestern Central Cordillera of the Colombian Andes, was described in 2014 based on eight males. Females, larvae, and many aspects of this species’ natural history were previously unknown. This article presents the results of three expeditions carried out in 2024 to the Belmira páramo complex (Antioquia, Colombia), providing the first description of the female and last instar larva of R. caligo. In addition, a new distribution record is included, accompanied by photographs and natural history notes that complement the information on its ecology and behavior.

**Notes on Ypthima persimilis Elwes & Edwards and its closely related species (Lepidoptera, Nymphalidae, Satyrinae)**

2025-07-01T11:05:36+12:00

In this paper, Ypthima persimilis Elwes & Edwards, 1893 and its closely related species, including Y. atra Cantlie & Norman, 1959, Y. microconjuncta Lang, 2024, Y. angustipennis Takáhashi, 2000 and Y. luxurians Forster, 1948, are studied. Among them, Ypthima persimilis and Y. atra are very similar species in appearance and sympatric from N.E. India to S.W. China (S. Yunnan) and N. Vietnam. For a reliable specific identification of these species, diagnoses are provided mainly based upon androconia and male genitalia features. Consequently, the taxon Ypthima atra taiwana Lamas, 2010 from Taiwan Island is reinstated to its specific status, viz. Y. taiwana stat. rev. Their ranges in China are discussed and a distributional map for all species is provided.

**A new species and an additional faunistic record of Scydmaenus Latreille (Coleoptera: Staphylinidae: Scydmaeninae) from Shanghai, China**

2025-07-01T11:06:26+12:00

A new member of Scydmaeninae, Scydmaenus shanghaicus Yin & Zhou, sp. nov., is described from material collected in Chongming and Jiading, Shanghai. This species is distinguished from its East Asian congeners primarily by the markedly slender aedeagus and the specific configuration of the endophallus armature. Illustrations of the habitus and major diagnostic characters are provided to facilitate reliable identification. Additionally, the occurrence of Scydmaenus vestitus (Sharp) in Shanghai is reported. These discoveries further suggest the potential of urban biodiversity surveys in revealing cryptic arthropod richness within anthropogenic ecosystems.

**Redescription of Bonea sarasinorum from Sulawesi, and the relationships of Bonea within Podoctinae (Opiliones, Grassatores, Podoctidae)**

2025-07-01T11:07:17+12:00

The family Podoctidae, which includes 131 species predominantly from Tropical Asia and Australasia, faces significant taxonomic challenges due to historically inadequate species descriptions. This study presents a detailed redescription of Bonea sarasinorum Roewer, 1914, the type species of the genus Bonea, based on specimens collected from its type locality in Sulawesi. The male of B. sarasinorum is described for the first time, enabling a reassessment of the genus’s systematic placement. Our findings confirm that Bonea belongs to Podoctinae lato sensu (including Erecananinae) rather than Ibaloniinae. However, several morphological traits suggest that Bonea is not a monophyletic group, with B. sarasinorum sharing close affinities with Dongmoa, while other Bonea species may be more closely related to Baramia and Hoplodino. Morphological terminology for the Podoctidae is updated, and the male genitalia of B. sarasinorum are compared to other Podoctinae species, revealing unique traits such as a deeply cleft distal truncus and poorly developed follis. This study highlights the importance of acquiring new material and employing modern imaging techniques, such as microCT, to refine taxonomic understanding of this family.

**Buccopharyngeal and skeletal morphology of tadpoles of Trachycephalus mesophaeus (Anura; Hylidae)**

2025-07-01T11:08:08+12:00