Comparative ultrastructure of the spermatogenesis of three species of Poecilosclerida (Porifera, Demospongiae) Vivian VasconcellosPhilippe WillenzEmilio Lanna Original paper 10 December 2018 Pages: 1 - 12
The sperm of Xenacoelomorpha revisited: implications for the evolution of early bilaterians John Buckland-NicksKennet LundinAndreas Wallberg Original paper 23 November 2018 Pages: 13 - 27
Oral sucker in Digenea: structure and muscular arrangement Darya Krupenko Original paper 20 November 2018 Pages: 29 - 37
Anterior sense organs in Sabellaria alveolata (Annelida, Sedentaria, Spionida) with special reference to ultrastructure of photoreceptor elements presumably involved in shadow reflex Christian MeyerLarisse Faroni-PerezGünter Purschke Original paper 31 October 2018 Pages: 39 - 54
The organization of musculature and the nervous system in the pygidial region of phyllodocid annelids Viktor V. Starunov Original Paper 03 January 2019 Pages: 55 - 71
Comparative morphology of the internal female genitalia in two species of Mantophasmatodea S. C. KüpperK.-D. KlassM. J. B. Eberhard Original paper 12 October 2018 Pages: 73 - 83
Variations in body shape of mountain habitat specialist Carabus croaticus and its sister species Carabus caelatus (Coleoptera: Carabidae) populations across Dinaric Alps Željka Jambrošić VladićHugo A. BenítezLucija Šerić Jelaska Original Article 11 December 2018 Pages: 85 - 96
Comparative morphology of the raptorial leg in thread-legged bugs of the tribe Metapterini Stål, 1859 (Hemiptera, Heteroptera, Reduviidae, Emesinae) Valentina Castro-HuertasDimitri ForeroJocelia Grazia Original Paper 08 February 2019 Pages: 97 - 116
The ontogeny of synaptophysin expression patterns on the GABAergic ciliary band-associated strand during larval development of the sea urchin, Hemicentrotus pulcherrimus A. Agassiz, 1864 Hideki KatowTomoko KatowMasato Kiyomoto Original paper 23 November 2018 Pages: 117 - 126
Comparative investigation into the morphology of oral papillae and denticles of four species of lamnid and sphyrnid sharks Bianca de Sousa RangelThierry SalmonRose Eli Grassi Rici Original paper 28 November 2018 Pages: 127 - 136
Musculoskeletal development of the Central African caecilian Idiocranium russeli (Amphibia: Gymnophiona: Indotyphlidae) and its bearing on the re-evolution of larvae in caecilian amphibians Tobias TheskaMark WilkinsonHendrik Müller Original paper 12 October 2018 Pages: 137 - 158
Distinguishing domestic pig femora and tibiae from wild boar through microscopic analyses Marco ZeddaDesiré BritsVittorio Farina Original paper 29 November 2018 Pages: 159 - 170
