A new bug, Imesovelia unispina gen. et sp. nov., is described from three specimens preserved in Upper Cretaceous Kachin amber of Myanmar. The taxon is assigned to Mesoveliidae based on the presence of three pairs of cephalic trichobothria inserted in deep cuticular pits, coxae inserted close to the ventral midline of the thorax and a well-developed ovipositor. The new genus is distinguished from other mesoveliids by a character state combination: head longer than thorax, antennae shorter than body, antennomere III longest, ventral head with a pair of long carinae, pronotum longer than mesonotum, metatarsomere II longest.Xiaoyu Zhang [zhangxiaoyu-dennis@foxmail.com], College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, PR China; Boya Wei [niu20050301@126.com], School of Data Science, Capital University of Economics and Business, Beijing 100070, China; Dong Ren [rendong@mail.cnu.edu.cn], College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China; Yunzhi Yao* [yaoyz100@126.com], College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China.
This study presents the first comprehensive revision and illustration of the type material of the himalayiatid ammonite Himalayites treubi, preserved as a plastoholotype of the lost original type specimen from Upper Jurassic strata of the Sula Islands in Indonesia. Detailed comparisons with closely related members of the Himalayitidae allow clear taxonomic distinctions. Himalayites treubi is closely allied with the Himalayites seideli-hollandi group from the Indo-Pacific Sub-realm. A phyletic connection between those Himalayites taxa and the neocomitid genus Blanfordiceras is hypothesized, as the diagnostic ornamental stage of Himalayites likely represents a derived innovation originating from a neocomitid morphology. Our analysis indicates that Indo-Pacific Himalayitidae do not exhibit clear phyletic links with the Suaritidae Cant & uacute;-Chapa, from the Caribbean Sub-realm, either in shell morphology, ontogeny, or ribbing pattern. The same applies to the newly proposed families Micracanthoceratidae fam. nov., predominantly known from the Mediterranean-Caucasian Sub-realm with occasional Tethyan occurrences; and Windhauseniceratidae fam. nov., which were mainly distributed along the southern margin of the Indo-Pacific Sub-realm. Several of their representatives were long assigned to the Himalayitidae. Yet, phylogenetic evidence indicates they derive from the Ataxioceratidae ancestral lineage. Finally, the genus Birobagoczkyceras gen. nov. is introduced herein based on Ammonites tripartitus, to recognize a group of upper Berriasian taxa from the Indo-Pacific Sub-realm that have long been conflated with Himalayites. Pseudohimalayites gen. nov. is also formally established to accommodate Himalayites nieri, which ranged across the Berriasian-Valanginian boundary in the Mediterranean Tethys. Both genera are assigned to the Neocomitidae based on ontogenetic development and suture-line characteristics.Camille Frau [camille_frau@hotmail.fr], Palaeo-Expertise, 8 Rue du Moulin, 65350 Cabanac, France; ICUB Fellowships for Young Researchers, University of Bucharest, Romania.
Permo-Carboniferous 'Spirifer-like' brachiopods from the Tepuel-Genoa Basin in Patagonia, Argentina, have been recognized for many years. Yet, their taxonomy has not been thoroughly evaluated. This study provides systematic descriptions of six species representing six different genera. Spiriferides include Kitakamithyris booralensis, Spirelytha trilagoonensis sp. nov., Crurithyris salinensis sp. nov. and Biconvexiella raqueliae sp. nov. Spiriferinides include Punctospirifer cf. P. ambiguus and Spinuliplica guangrongshi sp. nov. These new records enhance the diversity of Patagonia's southern cold-water Permian-Carboniferous faunas. They also support previous biostratigraphic schemes and strengthen the palaeobiogeographical links between southwestern Gondwana (represented by Patagonia) and eastern Gondwana during the late Palaeozoic.Ariana Valeria Robles Vilches* [ariana.robles@live.com.ar], Museo Paleontol & oacute;gico Egidio Feruglio, Fontana 140, Trelew (U9100), Chubut, Argentina; Arturo C & eacute;sar Taboada [taboadaart@gmail.com], Centro de Investigaci & oacute;n Esquel de Montana y Estepa Patag & oacute;nicas (CIEMEP) CONICET-UNPSJB, Roca 780, Esquel, (U9200), Chubut, Argentina; Laboratorio de Investigaciones en Evoluci & oacute;n y Biodiversidad (LIEB), Facultad de Ciencias Naturales y Ciencias de la Salud (FCNyCS), Sede Esquel, Edificio de Aulas, km 16.5, Esquel, (U9200), Argentina; Maria Alejandra Pagani [apagani@mef.org.ar], Museo Paleontol & oacute;gico Egidio Feruglio - CONICET, Fontana 140, Trelew (U9100), Chubut, Argentina.
