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Tuesday, April 12th, 2022
| Time | Event | ||||||
| 8:43a | [Ichthyology • 2021] Percina freemanorum • A New Species of Bridled Darter (Percidae: Etheostomatinae: Percina) Endemic to the Etowah River System in Georgia
Abstract Percina freemanorum, the Etowah Bridled Darter, is described as a new species endemic to the Etowah River system in Georgia, specifically in Long Swamp Creek, Amicalola Creek, and the upper portion of the Etowah River. The earliest collection records for Percina freemanorum date to 1948 and in 2007 the species was delimited as populations of Percina kusha. Our investigation into the systematics of Percina kusha is motivated by the uncertain status of populations in the Coosawattee River system and observed morphological disparity in several meristic traits between populations in the Conasauga and Etowah River systems. Our analyses of morphological divergence, nuclear genotypes, and mitochondrial DNA (mtDNA) haplotype networks confirm the distinctiveness of Percina freemanorum. Morphologically, Percina freemanorum is distinguished from Percina kusha through lower average numbers of lateral line scales (65.4 vs. 72.3); rows of transverse scales (18.0 vs. 21.4); scales around the caudal peduncle (22.1 vs. 24.9); and modally more pectoral fin rays (14 vs. 13). The two species are not reciprocally monophyletic in phylogenetic analysis of mtDNA sequences, but the two species do not share mtDNA haplotypes. Analysis of up to 158,000 double digest restriction-site associated DNA (ddRAD) sequencing loci resolve each of the two species as reciprocally monophyletic and genomic clustering analysis of single nucleotide polymorphisms identifies two genetic clusters that correspond to the morphologically delimited Percina freemanorum and Percina kusha. KEYWORDS: Teleostei, species delimitation, ddRAD, phylogeography
Percina freemanorum Near & Dinkins Etowah Bridled Darter
Etymology. Percina freemanorum is named in honor of Mary C. Freeman and Byron (Bud) J. Freeman, who have made substantial contributions to the study of freshwater fishes in the southeastern United States. In particular, their work has shed light on and significantly aided in the conservation ofthe biodiverse rich Etowah Riversystem. Thomas J. Near, Daniel J. MacGuigan, Emily L. Boring, Jeffrey W. Simmons, Brett Albanese, Benjamin P. Keck, Richard C. Harrington and Gerald R. Dinkins. 2021. A New Species of Bridled Darter Endemic to the Etowah River System in Georgia (Percidae: Etheostomatinae: Percina). Bulletin of the Peabody Museum of Natural History. 62(1); 15-42. DOI: 10.3374/014.062.0102 https://mcclungmuseum.utk.edu/wp-content/u Researchgate.net/publication/350558911_A | ||||||
| 12:12p | [Ichthyology • 2022] Hypostomus velhomonge • Review of the Armoured Catfish Genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with Description of A New Species
The species of Hypostomus from the Parnaíba River basin were reviewed through molecular and morphological analysis. Five species were found in the basin, including a new species herein described. The distribution of H. pusarum was expanded to this basin, and a closely related species was recorded (H. aff. pusarum), also the presence of H. johnii and H. vaillanti was confirmed. The new species is distinguished from most congeners by its large number of premaxillary and dentary teeth, a wide dental angle of 115° to 135°, presence of a rounded dark spots on a lighter background and anteromedial region of the abdomen depleted of plaques (vs. anteromedial region of the abdomen covered by platelets and odontodes in H. johnii, H. pusarum, H. aff. pusarum and H. vaillanti). Furthermore, an identification key of the species from the Maranhão-Piauí ecoregion and maps with the geographic distribution of these species are presented. The species of Hypostomus in the Parnaíba River basin have different geographic distributions, suggesting different niches or geographical barriers, providing an opportunity for ecological and evolutionary studies. Keywords: Cryptic diversity, DNA Barcode, Identification key, Integrative taxonomy, Maranhão-Piauí ecoregion.
Hypostomus velhomonge, new species Hypostomus sp. 2. —Ramos et al., 2014 (listed, ichthyofauna of the Parnaíba River). —Silva et al., 2015 (listed, ichthyofauna of the Gurgueia River). —Lima et al., 2017 (listed, ichthyofauna of the Caatinga). Diagnosis. Hypostomus velhomonge differs from congeners, except Hypostomus alatus Castelnau, 1855, H. arecuta Cardoso, Almirón, Casciotta, Aichino, Lizarralde & Montoya-Burgos, 2012, H. bolivianus (Pearson 1924), H. denticulatus Zawadzki, Weber & Pavanelli, 2008, H. francisci (Lütken, 1874), H. freirei Penido, Pessali & Zawadzki, 2021, H. isbrueckeri Reis, Weber & Malabarba, 1990, H. jaguar Zanata, Sardeiro & Zawadzki, 2013, H. kuarup Zawadzki, Birindelli & Lima, 2012, H. leucophaeus Zanata & Pitanga, 2016, H. luteomaculatus (Devincenzi, 1942), H. meleagris (Marini, Nichols & LaMonte 1933), H. multidens Jerep, Shibatta & Zawadzki, 2007, H. mutucae Knaack, 1999, H. myersi (Gosline, 1947), H. Paulinus (Ihering, 1905), H. regani (Ihering, 1905), H. strigaticeps (Regan, 1908), H. ternetzi (Boulenger, 1895), H. unae (Steindachner, 1878), H. uruguayensis Reis, Weber & Malabarba, 1990, and H. yaku Martins, Langeani & Zawadzki, 2014by having high number of teeth on premaxillary (62–95, mode 73) and dentary (64–110, mode 76) (vs. smaller number of teeth on both premaxillary and dentary, rarely more than 50). Hypostomus velhomonge differs from H. alatus, H. arecuta, H. francisci, H. luteomaculatus, H. meleagris, H. multidens, H. myersi, H. regani, H. sertanejo and H. strigaticeps by having dark spots over body and fins (vs. pale spots). The new species is distinguished from H. bolivianus, H. denticulatus, H. freirei, H. isbrueckeri, H. jaguar, H. johnii, H. ternetzi, H. uruguayensis and H. leucophaeus by having ventral region of head and anteromedial region of abdomen naked, even on larger specimens (vs. ventral region of head and anteromedial region of abdomen covered by plates at least on larger specimens). Additionally, H. velhomonge differs from H. bolivianus by having bicuspid teeth (vs. unicuspid teeth); from H. denticulatus by having teeth with asymmetric cusps (vs. teeth with symmetrical cusps); from H. isbrueckeri by having homogeneous caudal-fin ground color, without marks (vs. yellow band on distal caudal-fin margin in mature males); from H. jaguar by possessing faint, small dark spots on head, the spots, smaller than the pupil (vs. head covered with large spots, larger than the pupil); from H. johnii by presenting the caudal-fin ventral lobe slightly longer than dorsal lobe (vs. ventral lobe of caudal-fin much longer than dorsal lobe); from H. ternetzi by having roughly flat interorbital and predorsal region (vs. interorbital and predorsal region with strong median keel); from H. unae by having compressed caudal peduncle, its depth larger than its width at adipose-fin origin (vs. rounded caudal peduncle, its depth equal to its width at adipose-fin origin); from H. vaillanti by having ventral region of head and abdomen usually without spots; dark spots present in few specimens (vs. ventral region of head and abdomen with conspicuous spots in the shape of whole or half rings,); from H. uruguayensis by having one predorsal plate bordering supraoccipital (vs. three predorsal plates bordering supraoccipital). The new species can be distinguished from Hypostomus kuarup by having large dark spots on sides of body, spots similar in length to eye diameter (vs. small dark spots, similar in length to pupil diameter); from H. mutucae by having narrower dentaries, each dentary length about half interorbital width (vs. similar in length to interobital width; see figs. in p. 103 and 106 of Knaack, 1999 and fig. 7 in Zawadzki et al., 2012), by having smaller angle between dentaries, from 115° to 135° (vs. from 160° to 170°), and by having round oral disk (vs. clearly transversally elongated); from H. yaku by lacking hypertrophied odontodes on flanks (vs. hipertrophied odontodes on flanks, more developed in mature males). Geographical distribution. Hypostomus velhomonge is apparently endemic to Parnaíba River basin and, so far, the species has only been found in the upper and middle portions of the basin, restricted to Cerrado areas in the drainage (Fig. 6). Ecological notes and habitat. Hypostomus velhomonge was recorded in co-occurrence with other loricariids such as H. vaillanti in the Muquém stream, in Barão de Grajaú, Maranhão, with Loricaria parnahybae Steindachner, 1907 and Loricariichthys derbyi Fowler, 1915 in the rio Balsas. All localities where Hypostomus velhomonge were recorded presented riparian forest typical of the Cerrado biome (Fig. 6). The type locality, Balsas River, has clear waters, rocky and sandy substrate and varying amounts of remnants of riparian vegetation. Etymology. The specific epithet, “velhomonge”, is a reference to the Parnaíba River, commonly known as ‘Velho Monge’ (Old Monk, in English). One of the versions on the origin of this name portrays that a poet called Costa e Silva gave the river the nickname “Velho Monge” because, when seen from the city of Amarante, the confluence of Canindé River with Parnaíba River forms a landscape that, in profile, reminds the silhouette of a monk and whose foam suggests its long beard. A noun in apposition. Common names. Cari, acari, bodó. Silvia Yasmin Lustosa-Costa, Telton Pedro Anselmo Ramos, Cláudio Henrique Zawadzki and Sergio Maia Queiroz Lima. 2022. Review of the Armoured Catfish Genus Hypostomus (Siluriformes: Loricariidae) from the Parnaíba River basin, Northeastern Brazil, with Description of A New Species. Neotropical Ichthyology. 20(1); e210126. ni.bio.br/1982-0224-2021-0126/ 10.1590/1982-0224-2021-0126  | ||||||
| 4:39p | [Mollusca • 2021] Nakamigawaia nakanoae • The Taxonomic Status of the Headshield Slug Genus Nakamigawaia Kuroda & Habe, 1961 (Gastropoda: Cephalaspidea: Aglajidae), with the Description of A New Species from the Western Pacific
ABSTRACT Nakamigawaia is a poorly understood genus of Aglajidae sea slugs with only two species formally ascribed. In this paper we explore new morpho-anatomical characters using stereo and scanning electron microscopy and employ different molecular approaches (a cytochrome c oxidase sub-unit I gene phylogeny, the Automatic Barcode Gap Discovery species delimitation method, and genetic distances) to compare specimens across the geographical span of the genus and from two distinct chromatic morphotypes occurring in the Western Pacific (blackish morph and white-dotted morph). Our results support the conspecificity of these two morphs and show they belong to an undescribed species here named Nakamigawaia nakanoae sp. nov. The species differs from the type species of the genus, N. spiralis, by the presence of a distinct open-dilated shell and differs from its Western Atlantic congener N. felis by subtle differences in the shell, male reproductive system and caudal lobes. Genetically (COI uncorrected p-distance) the two species (N. nakanoae and N. felis) are 18.8–20.1% distinct. The definition of the genus Nakamigawaia is discussed and the current assignment to the latter of lineages other than the type species is questioned. KEYWORDS: biodiversity, DNA barcoding, Mollusca, morphology, phylogeny, Western Pacific
Nakamigawaia nakanoae Hellem and Malaquias sp. nov. Diagnosis: External colouration plain black or brownish dotted in white. Internal shell dilated with an open whorl extending half a turn, protoconch dorsally visible near transition to teleoconch, otherwise covered by teleoconch layer; ventrally a funnel-like structure can be present near protoconch. Right caudal lobe nearly half length of left lobe. Male reproductive system with pyriform penial chamber and tubular, long, folded prostate. Prostate about 5 times longer than penial chamber. Type locality: Taiwan, Pingtung County, Kenting National Park, Shadao. Etymology: The species is named after Dr Rie Nakano, for her passion and contributions to the study of the sea slug molluscs of Japan and for her continuous support throughout the years of our research work. Emma Hellem and Manuel António E. Malaquias. 2021. The Taxonomic Status of the Headshield Slug Genus Nakamigawaia Kuroda and Habe, 1961 (Gastropoda: Cephalaspidea: Aglajidae), with the Description of A New Species from the Western Pacific. Journal of Natural History. 55(35-36); 2231-2244. DOI: 10.1080/00222933.2021.1986165  | ||||||
| 5:33p | [Entomology • 2022] A Revision of the Palaearctic Pimeliini (Coleoptera: Tenebrionidae): A Comparative Analysis and Systematic Position of Eastern European and Asian Taxa with Dorso-lateral Eyes
ABSTRACT A taxonomic review of tenebrionid platyopoid genera of the subfamily Pimeliinae from Eastern Europe, Central Asia, Afghanistan, Iran and Pakistan is given. This group of taxa was known before 1994 as the tribe Platyopini Motschulsky, 1849, which is now interpreted as a junior synonym of Pimeliini Latreille, 1802. The group is different from other Pimeliini in having dorso-lateral eyes, located above the level of the genae, and it includes the following ultrapsammophilic genera at least from Central and Southern Asia: Apatopsis Semenov, 1891, Habrochiton Semenov-Tjan-Shansky, 1907, Habrobates Semenov, 1903 [= Kawiria Schuster, 1935 syn. nov.], Dietomorpha Reymond, 1938, Przewalskia Semenov, 1893, Mantichorula Reitter, 1889, Platyope Fischer von Waldheim, 1820 [= Homopsis Semenov, 1893 syn. nov.], Earophanta Semenov, 1903. These genera are distributed in almost all large deserts of Palaearctic Asia: Karakum, Kyzylkum, Muyunkum, Taklamakan, Gobi, Registan, Dasht-e-Kawir, Dasht-e-Lut, as well as in other arid and semi-arid sandy landscapes from European Russia to the south of Eastern Siberia. The group of platyopoid genera is polyphyletic. We propose at least two monophyletic branches: the Habrobates genus group (the first four genera mentioned above), which represents the subtribe Habrobatina Nabozhenko & S. Chigray subtrib. nov. and the Platyope genus group (latter four genera) within the nominotypical subtribe. A new species is described from Pakistan (Balochistan): Dietomorpha gonzalesi S. Chigray & Nabozhenko sp. nov. Platyope granulata Fischer von Waldheim, 1820 is recorded for Kazakhstan for the first time. The following synonymy is resurrected: Apatopsis grombczewskii Semenov, 1890 = Apatopsis conradti Semenov, 1890, syn. resurr. Two new combinations resulting from the synonymy of genera are given: Habrobates gabrieli Schuster, 1935 comb. nov. (from Kawiria), Platyope grumi Semenov, 1893 comb. nov. (from Homopsis). Lectotypes are designated for the following taxa: Apatopsis grombczewskii (Semenov, 1891), Apatopsis conradti Semenov, 1891, Habrochiton vernus Semenov-Tjan-Shansky, 1907, Habrobates vernalis Semenov, 1903, Kawiria gabrieli Schuster, 1935, Platyope dilatata Reitter, 1887; Mantichorula semenowi Reitter, 1889, Mantichorula grandis Semenov, 1893, Homopsis grumi Semenov, 1893, Platyope serrata Semenov, 1893, Platyope planidorsis Reitter, 1889, Platyope tomentosa Semenov, 1893. Additional information for type specimens studied by the authors is given for Habrochiton primaeveris Semenov-Tjan-Shansky, 1907 (holotype), Habrobates vejisovi Kelejnikova, 1977, Platyope ordossica Semenov-Tjan-Shansky, 1907 (holotype), Earophanta autumnalis Semenov, 1903 (holotype, junior synonym of E. planidorsis Reitter, 1889), Earophanta loudoni Semenov, 1903 (holotype, junior synonym of Earophanta pilosissima Reitter, 1895), Earophanta pubescens Skopin, 1960 (holotype, paratypes), Earophanta beludzhistana Bogatchev, 1957 (holotype). Keywords: Tenebrionidae, Pimeliini, new taxa, synonymy, nomenclature
Dietomorpha gonzalesi S. Chigray & Nabozhenko sp. nov. Etymology: The new species is named after David Gonzales (Saint-Laurent-du-Pape, France), who made a great contribution to the Tenebrionidae of the New and Old Worlds. Svetlana N. Chigray, Maxim V. Nabozhenko, Ivan A. Chigray and Evgeny V. Abakumov. 2022. A Revision of the Palaearctic Pimeliini (Coleoptera: Tenebrionidae): A Comparative Analysis and Systematic Position of Eastern European and Asian Taxa with Dorso-lateral Eyes. European Journal of Taxonomy. 809(1); 1–71. DOI: 10.5852/ejt.2022.809.1719 [2022-04-05]  |
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