1. Bumps on the back: An unusual morphology in phylogenetically distinct Peridinium aff. cinctum (= Peridinium tuberosum; Peridiniales, Dinophyceae)

   • Selin Gürkan
   • Benedikt Stemplinger
   • Marc Gottschling

   ORIGINAL ARTICLE Open access 20 January 2024 Pages: 1 - 15

   

2. Intermediary floral traits between natural hybrid and its parents in the Xiquexique (Cactaceae)

   • Sinzinando Albuquerque-Lima
   • Paulo Milet-Pinheiro
   • Isabel C. Machado

   ORIGINAL ARTICLE 04 January 2024 Pages: 17 - 34

   

3. Evidence of cryptic speciation in the invasive hydroid Cordylophora caspia (Pallas, 1771) (Cnidaria, Hydrozoa) supported by new records

   • Rayan Silva de Paula
   • Amanda Ferreira e Cunha
   • Lucília Souza Miranda

   ORIGINAL ARTICLE 08 January 2024 Pages: 35 - 50

   

4. Molecular phylogeny and comparative morphology reveal the species validity and systematic position of Lepidodesma (Bivalvia: Unionidae)

   • Ruiwen Wu
   • Lili Liu
   • Zhengfei Li

   ORIGINAL ARTICLE 06 December 2023 Pages: 51 - 66

   

5. Hardly Venus’s servant—morphological adaptations of Veneriserva to an endoparasitic lifestyle and its phylogenetic position within Dorvilleidae (Annelida)

   • Ekin Tilic
   • Greg W. Rouse

   ORIGINAL ARTICLE Open access 16 January 2024 Pages: 67 - 83

   

6. Alcyonidium kuklinskii sp. nov., a new species of Antarctic ctenostome bryozoan with a key to all Antarctic species of the genus

   • Thomas Schwaha
   • Valentina Cometti
   • Stefano Schiaparelli

   ORIGINAL ARTICLE Open access 08 December 2023 Pages: 85 - 94

   

7. Correction to: Alcyonidium kuklinskii sp. nov., a new species of Antarctic ctenostome bryozoan with a key to all Antarctic species of the genus

   • Thomas Schwaha
   • Valentina Cometti
   • Stefano Schiaparelli

   Correction Open access 18 January 2024 Pages: 95 - 97

   

8. Phylogenetic position of the Amazonian nurse frog Allobates gasconi (Morales 2002) revealed by topotypical data

   • Anthony S. Ferreira
   • Miquéias Ferrão
   • Albertina P. Lima

   Original Article 22 December 2023 Pages: 99 - 118

   

9. Integrated evidence sheds light on the taxonomy of the widespread Tantilla melanocephala species complex (Serpentes: Colubridae) and indicates the existence of a new species from southern South America

   • Weverton dos Santos Azevedo
   • Francisco Luís Franco
   • Felipe Gobbi Grazziotin

   ORIGINAL ARTICLE 24 January 2024 Pages: 119 - 147