Ultrastructure of pigmented eyes in Onuphidae and Eunicidae (Annelida: Errantia: Eunicida) and its importance in understanding the evolution of eyes in Annelida Tim von PalubitzkiGünter Purschke Original Paper 11 October 2019 Pages: 1 - 19
General morphology and ultrathin structure of the gonopericardial complex of Chaetoderma nitidulum Lovén, 1844 (Caudofoveata) Elizaveta NaduvaevaElena Vortsepneva Original paper 19 December 2019 Pages: 21 - 35
From hair pin to safety pin: evolution of the ovipositor apparatus in Orussidae (Insecta: Hymenoptera) Lars Vilhelmsen Original Paper 05 November 2019 Pages: 37 - 49
Ultrastructure of the genital papillae in the fresh-water mite Limnochares aquatica (L., 1758) (Acariformes, Limnocharidae) Andrey B. ShatrovE. V. Soldatenko Original Paper 05 December 2019 Pages: 51 - 59
Neuromast distribution and its relevance to feeding in Neotropical freshwater stingrays (Elasmobranchii: Potamotrygonidae) Akemi ShibuyaJansen ZuanonMarcelo R. de Carvalho Original Paper 07 December 2019 Pages: 61 - 69
Negative allometric growth during ontogeny in the large pelagic filter-feeding basking shark Harald AhneltMichael SaubererClaudia Pogoreutz Original Paper Open access 05 October 2019 Pages: 71 - 83
Spatial and temporal changes in buccal pressure during prey-capture in the trumpetfish (Aulostomus maculatus) Samuel TeggeJason HallSteve Huskey Original Paper 04 December 2019 Pages: 85 - 95
Smooth, striated, or rough: how substrate textures affect the feeding performance of tadpoles with different oral morphologies Fabiane Santana AnnibaleVerônica Thiemi Tsutae de SousaFausto Nomura Original paper 15 November 2019 Pages: 97 - 110
Comparative morphology and allometry of select extant cryptodiran turtle kidneys Christopher ThigpenLogan BestTroy Camarata Original Paper Open access 28 September 2019 Pages: 111 - 121
Vaginal plug formation and release in female hibernating Korean greater horseshoe bat, Rhinolophus ferrumequinum korai (Chiroptera: Rhinolophidae) during the annual reproductive cycle Jung-Hun Lee Original Paper 02 November 2019 Pages: 123 - 129
Julian Huxley and the quantification of relative growth Gary C. Packard Methods Paper 25 October 2019 Pages: 131 - 140