Sexual maturity and growth of male toads (Rhinella ornata): a comparison between insular and mainland populations
Publication date: Available online 20 July 2019Source: Zoologischer AnzeigerAuthor(s): Raoni Rebouças, Hélio Ricardo da Silva, Delfi Sanuy, Mirco SoléAbstractWe studied differences in age, longevity, and sexual maturity in island and mainland populations of the neotropical toad Rhinella ornata to assess how changes in sexual characteristics relate to evolution of insular dwarfism. Here we tested the hypothesis that effects of the island rule results in earlier sexual maturity. We sampled males from three insular (Ilha Grande, Ilha da Marambaia and Ilha de Itacuruçá) and four adjacent mainland sites in the state of Rio...
Source: A Journal of Comparative Zoology - July 21, 2019 Category: Zoology Source Type: research
The dimension of biological change caused by autotriploidy: A meta-analysis with triploid crayfish Procambarus virginalis and its diploid parent Procambarus fallax
Publication date: July 2019Source: Zoologischer Anzeiger, Volume 281Author(s): Günter Vogt, Nathan J. Dorn, Michael Pfeiffer, Chris Lukhaup, Bronwyn W. Williams, Ralf Schulz, Anne SchrimpfAbstractThe biological changes caused by autotriploidy are poorly studied in animals. To investigate this issue in depth, we compared genetics, morphology, life history, ecology and behaviour of the triploid marbled crayfish and its diploid parent, slough crayfish Procambarus fallax. We performed a meta-analysis of our data and literature data. Our COI based molecular tree, consisting of 27 species of Cambaridae, confirmed the close taxo...
Source: A Journal of Comparative Zoology - July 7, 2019 Category: Zoology Source Type: research
Morphometry, size at maturity, and fecundity of marbled crayfish (Procambarus virginalis)
Publication date: Available online 5 July 2019Source: Zoologischer AnzeigerAuthor(s): Md Shakhawate Hossain, Antonín Kouba, Miloš BuřičAbstractMorphometric ratios, relationships and condition factors provide information regarding growth patterns, population dynamics and well-being of individuals in particular environments. Ecology of any species is then better understandable through life history traits and reproductive potential. The present study is aimed at exploring the morphometric and reproductive patterns of the parthenogenetic marbled crayfish, Procambarus virginalis. Marbled crayfish exhibited positive allometr...
Source: A Journal of Comparative Zoology - July 6, 2019 Category: Zoology Source Type: research
A striking case of convergent evolution in two species of Cypricercinae (Crustacea, Ostracoda), with the description of a new genus and species from Brazil
Publication date: Available online 5 July 2019Source: Zoologischer AnzeigerAuthor(s): Vitor Góis Ferreira, Janet Higuti, Koen MartensAbstractNeostrandesia striata gen. n. sp. n. is here described and constitutes an interesting case of convergent evolution with Bradleytriebella lineata (Victor and Fernando, 1981). Both cypricercine species look superficially similar, with comparable valve and carapace shapes and especially ornamentation, as in both species the valves are densely set with longitudinal ridges. However, examination of the limb chaetotaxy shows important differences, especially in the chaetotaxy of the maxillu...
Source: A Journal of Comparative Zoology - July 6, 2019 Category: Zoology Source Type: research
Phylogenetic systematics of the Neotropical caecilian amphibian Luetkenotyphlus (Gymnophiona: Siphonopidae) including the description of a new species from the vulnerable Brazilian Atlantic Forest
Publication date: Available online 6 July 2019Source: Zoologischer AnzeigerAuthor(s): Adriano Oliveira Maciel, Thiago M. de Castro, Marcelo José Sturaro, Izadora Emanuelle Costa Silva, Jordana Guimarães Ferreira, Rafael dos Santos, Bárbara Risse-Quaioto, Bruno Alenkine Barboza, Jane C.F. Oliveira, Iracilda Sampaio, Horacio SchneiderAbstractLuetkenotyphlus brasiliensis has been described 168 years ago, being the only known species of that genus up till date. However, the diversity of caecilian amphibians surprises once again, with the discovery of a new species of Luetkenotyphlus from remnants of the critically threatene...
Source: A Journal of Comparative Zoology - July 6, 2019 Category: Zoology Source Type: research
The dimension of biological change caused by autotriploidy: a meta-analysis with triploid crayfish Procambarus virginalis and its diploid parent Procambarus fallax
Publication date: Available online 2 July 2019Source: Zoologischer AnzeigerAuthor(s): Günter Vogt, Nathan J. Dorn, Michael Pfeiffer, Chris Lukhaup, Bronwyn W. Williams, Ralf Schulz, Anne SchrimpfAbstractThe biological changes caused by autotriploidy are poorly studied in animals. To investigate this issue in depth, we compared genetics, morphology, life history, ecology and behaviour of the triploid marbled crayfish and its diploid parent, slough crayfish Procambarus fallax. We performed a meta-analysis of our data and literature data. Our COI based molecular tree, consisting of 27 species of Cambaridae, confirmed the clo...
Source: A Journal of Comparative Zoology - July 3, 2019 Category: Zoology Source Type: research
High osteological variation in a terrestrial salamander (genus Salamandrina)
Publication date: Available online 22 June 2019Source: Zoologischer AnzeigerAuthor(s): Peter Pogoda, Alexander KupferAbstractMorphological characters underlie diverse intraspecific variation. Investigating this variation on an intra- and interspecific level can help to understand the evolution of traits, body parts and morphological diversification of species. Variation in vertebrae number played a major role in the evolution of urodeles, while other osteological characters are less well investigated. The emerging non-invasive technique of micro-computer tomography (mCT) facilitates studies on osteological anomalies in a c...
Source: A Journal of Comparative Zoology - June 24, 2019 Category: Zoology Source Type: research
Fifth International Scalidophora Workshop
Publication date: Available online 15 June 2019Source: Zoologischer AnzeigerAuthor(s): Maikon Di Domenico, Martin V. Sørensen (Source: A Journal of Comparative Zoology)
Source: A Journal of Comparative Zoology - June 22, 2019 Category: Zoology Source Type: research
A new species of Echinoderes (Cyclorhagida: Echinoderidae) from the San Juan Islands, Washington State, USA, and insights into the kinorhynch transcriptome
Publication date: Available online 19 June 2019Source: Zoologischer AnzeigerAuthor(s): Rebecca M. Varney, Peter Funch, Kevin M. Kocot, Martin V. SørensenAbstractA new kinorhynch species, Echinoderes kohni sp. nov., is described from the San Juan Archipelago, northwest Washington State, USA. The species’ spine/tube distribution combined with the presence of long, spiniform tergal extensions assign it to the Echinoderes spinifurca species group. It is distinguished from other species in the group by its enlarged fringe tips on the posterior sternal plate margins of segment 10, and by its distribution of type 2 glandular c...
Source: A Journal of Comparative Zoology - June 19, 2019 Category: Zoology Source Type: research
Editorial Board
Publication date: May 2019Source: Zoologischer Anzeiger, Volume 280Author(s): (Source: A Journal of Comparative Zoology)
Source: A Journal of Comparative Zoology - June 15, 2019 Category: Zoology Source Type: research
Gracilideres mawatarii, a new genus and species of Franciscideridae (Allomalorhagida: Kinorhyncha) – A kinorhynch with thin body cuticle, adapted to the interstitial environment
Publication date: Available online 5 June 2019Source: Zoologischer AnzeigerAuthor(s): Hiroshi YamasakiAbstractA new genus and species of Kinorhyncha, Gracilideres mawatarii gen. et sp. nov. is described from coarse subtidal sand, west of Tanegashima Island, Japan. The genus and species is characterized by a cylindrical neck with sparsely arranged longitudinal crimps at surface; segments 1–10 each consisting of a single cylindrical cuticular plate; middorsal and ventromedial string-like glandular cells on segments 1–9; primary pectinate fringes with pectinate fringe teeth on segments 1–10; lateral accessory pores on s...
Source: A Journal of Comparative Zoology - June 15, 2019 Category: Zoology Source Type: research
Editorial
Publication date: Available online 15 June 2019Source: Zoologischer AnzeigerAuthor(s): Maikon Di Domenico, Martin V. Sørensen (Source: A Journal of Comparative Zoology)
Source: A Journal of Comparative Zoology - June 15, 2019 Category: Zoology Source Type: research
Microscopic priapulid larvae from Antarctica
We report 24 larvae of macroscopic priapulids from north of the Antarctic Peninsula and from Potter Bay, King George Island. We assign the larvae to four groups according to their lorica pattern, which consists of platelets created by ridges. In larvae of the first group the platelets in the middle region of the lorica interdigitate in a zig-zag way, this has been described only for Priapulopsis australis. Larvae of groups 2 and 3 have more rectangular platelets and differ in the presence and abundance of paired versus unpaired platelets. The position of the larval tubuli corresponds to reported larvae of Priapulus tubercu...
Source: A Journal of Comparative Zoology - June 10, 2019 Category: Zoology Source Type: research
Kinorhyncha from the Caribbean, with the description of two new species from Puerto Rico and Barbados
Publication date: Available online 5 June 2019Source: Zoologischer AnzeigerAuthor(s): Diego Cepeda, Fernando Pardos, Nuria SánchezAbstractTwo new kinorhynch species from Puerto Rico (Greater Antilles) and Barbados (Lesser Antilles) are described herein from Dr R. P. Higgins unexamined Caribbean meiofaunal samples, which have been stored in the Smithsonian Institution collections. The species from Puerto Rico, Cristaphyes cornifrons sp. nov., belongs to the class Allomalorhagida, whereas the species from Barbados, Echinoderes barbadensis sp. nov., belongs to the class Cyclorhagida. Cristaphyes cornifrons sp. nov. is easily...
Source: A Journal of Comparative Zoology - June 6, 2019 Category: Zoology Source Type: research
The genus Condyloderes (Kinorhyncha: Cyclorhagida) in the Mediterranean Sea, including the description of two new species with novel characters
We report a certain degree of intraspecific variation of taxonomically diagnostic characters like the presence or absence of cuspidate spines and sensory spots on some segments in C. agnetis sp. nov. and C. multispinosus. The presence of regularly arranged cuticular hairs on most trunk segments and of an acicular spine in lateral accessory position on segment 1, along with the absence of an area of micropapillae on segment 9 in females of C. agnetis sp. nov. and C. clarae sp. nov., unique within the genus, suggest the existence of distinct evolutionary lines within Condyloderes. The discovery of the two new species highlig...
Source: A Journal of Comparative Zoology - June 6, 2019 Category: Zoology Source Type: research
