CF de Mello-Leitao’s scientific contributions

... The natural and original distribution of this species is restricted to the humid Chacoan woods of northern Argentina . Since the early 1930s, synanthropic populations have expanded southwards, currently occupying almost all cities in central and northern Argentina (Mello Leitão 1934, 1945Maury 1970Maury , 1997Ojanguren-Affilastro et al. 2019, 2021, reaching as far south as 35°latitude (Martínez et al. 2021;Ojanguren-Affilastro et al. 2021). There are also a couple of records from the Uruguayan city of Colonia del Sacramento, where it is likely present (Maury 1997;Toscano-Gadea 2012), and some isolated specimens were very recently collected in the Brazilian state of Rio Grande do Sul (Ilarraz-Massia, pers. ...

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The Ongoing Expansion of the Medically Important Scorpions in Southern South America

... Se encuentra en las tierras bajas del occidente de Ecuador y es muy probable que también se distribuya en el noroeste de Perú. En la provincia de Guayas, se ha registrado en Posorja, Guayaquil, Durán, Cerro Santa Ana, El Salado, Isla Puná (Campos, 1919(Campos, -1932Mello-Leitão, 1939), Cerro Colorado, B. P. Prosperina, Cerro Totoral, Cerro Paraíso, B. P. Cerro Blanco y Capeira (E.Z.). Además, se encuentra presente en las provincias de Manabí y Santa Elena. ...

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Zavala et al. 2025. En: Fauna de Caperia: Anchotatus camposi.

... Kraepelin (1911) first proposed three species groups within Tityus. Then, in a series of contributions Mello-Leitão (1931, 1939, 1945 raised this number to 15 species groups. Among them was Tityus forcipula, a species group originally proposed by Mello-Leitão (1931) to accommodate 15 species and four subspecies. ...

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On the Tityus forcipula species group: redescription of Tityus forcipula (Scorpiones, Buthidae), description of a new Andean species, and notes on the taxonomy of the group

... Males of A. harti can be recognized from all their geographically relative species [i.e. the Cucutaensis Group sensuMiglio et al. (2020)] by the absence of the typical apical tegular process on the palpal bulb (present in other known congeners of the Cucutaensis Group). Females somewhat resemble A. cucutaensis(Mello-Leitão, 1941) in spermathecal morphology but can be distinguished by the comparatively wider spacing of the receptacles at their base (spacing comparatively narrower in A. cucutaensis), and further by the wider fovea (fovea narrower in A. cucutaensis). Females further differ from A. lomalindaMiglio, Pérez-Miles & Bonaldo, 2020 and A. robustus by the spermathecal base wider and less baso-medially fused (spermathecal base narrower and more baso-medially fused in A. lomalinda and A. robustus). ...

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On the specimens of Actinopus Perty, 1833 deposited in the Natural History Museum, London, with redescriptions, first description of missing sexes, and notes on other taxa (Araneae: Actinopodidae)

... additionally, Diplura lineata (Lucas, 1857) is redescribed, two synonymies are given and the species distribution is widened. The type-locality of D. parallela (Mello-Leitão, 1923) is corrected from argentina to Brazil. ...

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Redescription and synonymies of Diplura macrura (C.L. Koch, 1841) and D. lineata (Lucas, 1857), with notes on the genus (Araneae, Dipluridae)

... The presence of Paratropididae in Colombia was informally indicated by de Mello-Leitão (1941) and in unpublished studies Sánchez-C. 1995, Perafán et al. 2013); however, this is the first formal report for the country. ...

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The first Paratropididae (Araneae, Mygalomorphae) from Colombia: new genus, species and records

... Cette espèce est présente dans l'Aveyron (12), le Gard (30), l'Hérault (34), la Lozère (48), l'Yonne (89) (roewer, 1950 ;Dresco, 1953 ;Delfosse, 2004 (in part.) ; Moreno & Prieto, 2015). Martens (1983) [siMon, 1879[siMon, , 1881[siMon, , 1907[siMon, & 1911Mello-leitao, 1936et loPez et al. 1980]. La carte de Martens (1983) Dresco, 1953& raMBla, 1967. ...

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Nouvelles données et répartition de Sabacon viscayanus Simon, 1881 en France métropolitaine (Arachnida : Opiliones : Sabaconidae)