title: Cryptic diversity in the Hypsiboas semilineatus species group (Amphibia, Anura) with the description of a new species from the eastern Guiana Shield.
abstract: We used molecular and morphological data to investigate the hidden diversity within the Hypsiboas semilineatus species group, and more specifically within H. geographicus, an allegedly widespread species in northern South America. As a result, the identity of H. geographicus was clarified, several candidate species were detected and one of them, from the eastern Guiana Shield, is described herein as a preliminary step to resolve the taxonomy of the group. Hypsiboas diabolicus sp. nov. is mainly distinguished from closely-related species by an acuminate snout in lateral view, well-developed webbing between fingers and toes, and unspotted carmine/crimson colouration on the concealed surfaces of legs, feet and hands in life. The tadpole of the new species is described and is characterized by a large A-2 gap, a mostly single row of large marginal papillae, and a dark brown to black colouration. We also describe the advertisement call of the new species, which is defined as a soft call consisting of short clusters of 2-3 chuckles with a dominant frequency ranging between 1.11-1.19 kHz. Hypsiboas diabolicus sp. nov. is currently known only from the eastern Guiana Shield, and is probably endemic to that region. The new species' range overlaps broadly with another candidate species referred to as H. aff. semilineatus 1. Our preliminary results stress out a high cryptic diversity in that species group and the need for a formal redescription of Hypsiboas geographicus based on more topotypic material than what is currently available  to properly sort out the taxonomic status of several lineages in that clade.
authors.affiliation: CNRS Guyane USR3456, Immeuble Le Relais, 2 Avenue Gustave Charlery, 97300, Cayenne, French Guiana; Email: fouquet.antoine@gmail.com.
authors.forename: Antoine
authors.initials: A
authors.lastname: Fouquet
authors.affiliation: CNRS Guyane USR3456, Immeuble Le Relais, 2 Avenue Gustave Charlery, 97300, Cayenne, French Guiana; Email: unknown.
authors.forename: Quentin
authors.initials: Q
authors.lastname: Martinez
authors.affiliation: Museum of Vertebrate Zoology, University of California, Berkeley, CA, USA; Email: unknown.
authors.forename: Lauren
authors.initials: L
authors.lastname: Zeidler
authors.affiliation: CNRS Guyane USR3456, Immeuble Le Relais, 2 Avenue Gustave Charlery, 97300, Cayenne, French Guiana; Email: unknown.
authors.forename: Elodie A
authors.initials: EA
authors.lastname: Courtois
authors.affiliation: CNRS Guyane USR3456, Immeuble Le Relais, 2 Avenue Gustave Charlery, 97300, Cayenne, French Guiana; Email: unknown.
authors.forename: Philippe
authors.initials: P
authors.lastname: Gaucher
authors.affiliation: Pointe Maripa, RN2/PK35, 97311, Roura, French Guiana; Email: unknown.
authors.forename: Michel
authors.initials: M
authors.lastname: Blanc
authors.affiliation: Centro de Pesquisas Zoobotânicas e Geologicas (CPZG), Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá (IEPA), Macapá, AP, Brazil; Email: unknown.
authors.forename: Jucivaldo Dias
authors.initials: JD
authors.lastname: Lima
authors.affiliation: Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Caixa Postal 11.461, CEP 05508-090, São Paulo, SP, Brazil; Email: unknown.
authors.forename: Sergio Marques
authors.initials: SM
authors.lastname: Souza
authors.affiliation: Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Caixa Postal 11.461, CEP 05508-090, São Paulo, SP, Brazil; Email: unknown.
authors.forename: Miguel T
authors.initials: MT
authors.lastname: Rodrigues
authors.affiliation: Centro de Pesquisas Zoobotânicas e Geologicas (CPZG), Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá (IEPA), Macapá, AP, Brazil; Email: unknown.
authors.forename: Jucivaldo Dias
authors.initials: JD
authors.lastname: Lima
authors.affiliation: Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Caixa Postal 11.461, CEP 05508-090, São Paulo, SP, Brazil; Email: unknown.
authors.forename: Sergio Marques
authors.initials: SM
authors.lastname: Souza
authors.affiliation: Universidade de São Paulo, Instituto de Biociências, Departamento de Zoologia, Caixa Postal 11.461, CEP 05508-090, São Paulo, SP, Brazil; Email: unknown.
authors.forename: Miguel T
authors.initials: MT
authors.lastname: Rodrigues
authors.affiliation: Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, 2 Pleinlaan, B-1050 Brussels, Belgium; Email: unknown.
authors.forename: Philippe J R
authors.initials: PJ
authors.lastname: Kok
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001001:Anura / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D044822:Biodiversity; D049628:Body Size; D005260:Female; D006172:Guyana; D008297:Male; D009929:Organ Size; D010802:Phylogeny; D014828:Vocalization, Animal