Johann Georg Wagler (28 March 1800 – 23 August 1832) was a German herpetologist and ornithologist.

Wagler was assistant to Johann Baptist von Spix, and gave lectures in zoology at the Ludwig Maximilian University of Munich after it was moved to Munich.Balss, Heinrich (1926). "Die Zoologische Staatssammlung und das Zoologische Institut ". In: Müller (ed.) Die wissenschaftlichen Anstalten der Ludwig-Maximilians-Universität. pp. 300-315. He worked on the extensive collections brought back from Brazil by Spix, and published partly together with him books on reptiles from Brazil. Wagler wrote Monographia Psittacorum (1832), which included the correct naming of the blue macaws.

In 1832, Wagler died of an accidental self-inflicted gunshot wound while out collecting in München-Moosach.

Life

During this mission across Europe, Johann Georg Wagler was not only made the personal acquaintance of some of the most decorated naturalists and scientists of these nations at the time but also succeeded in acquiring a significant quantity of valuable specimens for the Museum and Menagerie of Munich (Beolens, Watkins & Grayson, 2011). Upon Johann Baptist von Spix's death in 1826, Johann Georg Wagler became the Director of the Zoological Museum and Ludwig Maximilian University in Munich, where Wagler continued working on Spix's extensive Brazilian collection from years prior (Beolens, B., Watkins, M., & Grayson, M, 2011). In 1827 Wagler was appointed Professor Extraordinary in the then newly instituted University of Munich (Wagler, 1884). In 1832, Johann Georg Wagler was unfortunately injured from a self-inflicted gunshot on a hunting trip, an incident that led directly to his demise (Beolens, Watkins & Grayson, 2011). During his short life span of only thirty-two years, Wagler managed to become a valuable member of the science community with many great and important contributions and discoveries.

Works

Legacy

Wagler described a taxonomic arrangement of psittacine fauna, parrots and cockatoos, some of which are recognised in the systematic classification of these birds.

Awards

Contributions

More recently, Wagler's discoveries and works have helped scientists to categorise and research some newfound species from the Iberian Peninsula (Ceríaco & Bauer, 2018). Scientists have also recently found a new species of snake in Indonesia that shared similarities with that of Wagler's discovery in the 1800s, the fossorial snake genus Cylindrophis Wagler 1828 (Kieckbusch, Mader, Kaiser & Mecke, 2018). The fossorial snake genus Cylindrophis Wagler, 1828 currently includes 13 species and is common and widely distributed in tropical Asia. There is evidence of existence in Sri Lanka (one species), mainland Southeast Asia including south-eastern China (three species), and the Malay Archipelago (ten species). All species in the genus seem viviparous and share a myriad of morphological characteristics, such as the lack of true gastrosteges, the presence of pelvic spurs, an extremely short tail with conspicuous coloration, and contrasting light and dark ventral blotches. Since the new species was recognised as Cylindrophis melanotus, it is important to discuss the taxonomic history of C. melanotus. The name C. melanotus was first created by Johann Georg Wagler in his Observationes along with the description of C. resplendens (synonym of C. ruffus).

The name showed up in its ablative form as “Cylindrophe melanoto.” While at the time of discovery, a specimen was available to Johann Georg Wagler in the collection of the “Museo Lugdunensi Bat[avorum]” (now RMNH), Wagler also referred to a figure of “Tortricis melanoti” by Caspar Georg Carl Reinwardt (1773–1854), which was likely part of Heinrich Boie's (1794–1827) unpublished manuscript Erpétologie de Java. The nominative form “Cylindrophis melanotus” (nomen corrigendum) was instead listed by Wagler (1830) in an account for the genus Cylindrophis. Two further species, currently in synonymy with Cylindrophis melanotus, were described in the early 20th Century, C. celebensis Smith, 1927 from Sulawesi and C. heinrichi Ahl, 1933 from the Moluccan island of Halmahera. Johann Georg Wagler described his new species as possessing a light snout with dark mottling.

In 2008, a study was conducted to determine the important impacts for the nomenclature of Kinglet Calyptura Calyptura cristata as well as of its distribution (Stopiglia, Straker & Raposo, 2008). The work of Johann Georg Wagler was used to analyse the findings. A specimen (ZMB 2306) of Kinglet Calyptura Calyptura cristata retrieved in São Paulo by Friedrich Sellow (1789–1831) and Ignaz Franz J. M. von Olfers (1793–1872) was rediscovered in the ornithological collection of the Museum für Naturkunde (ZMB) in Berlin in 2007. Specimen ZMB 2306 has two labels: a label in red inscribed ‘Pipra tyrannulus Wagler and a green label from the original mount that identifies the specimen as Pipra (R.) tyrannulus. In relation to the species of Pipra tyrannulus Wagler, 1830, it appears that Wagler (1830) worked on a revision of the genus Pipra and proposed a new combination for ‘Regulus tyrannulus Lichtenstein’.

The name tyrannulus has been interpreted in two different ways throughout the course of history. Sclater considered Pipra tyrannulus Wagler, 1830, as a synonym of Calyptura cristata, whereas Hellmayr claimed Pipra tyrannulus Wagler, 1830, to be a new name for Pardalotus cristatus Vieillot, 1818. Breaking down the specimen and history, it is obvious that Wagler (1830) was first to publish the name tyrannulus. Although Johann Georg Wagler never claimed to be the author of the specific name, in accordance with the terms of the Code (ICZN 1999) he is, nevertheless, its author. Wagler never brought up tyrannulus as being a new name for cristatus. He instead mentioned Pardalotus cristatus as a synonym of Pipra tyrannulus.

Some of Johann Georg Wagler's works in the 1800s remains an interesting topic of discussion today among scientists within the fields of ontology and herpetology. The Curl-crested Aracari Pteroglossus beauharnaesii Wagler, 1832 is one of the most scientifically significant species in the family Ramphastidae (Costa, Pacheco & Silveira, 2017). Among its distinctive characteristics, its modified curly, shiny black crown feathers are one-of-a-kind in the family and are altered to an extent not similar in any other living bird species. The crown feathers, accompanied with the distinctive white throat, were considered enough in the past to include the species in the monotypic genus Beauharnaisius Bonaparte; nevertheless, molecular research have pointed out that it is embedded within the genus Pteroglossus Illiger, sister to P. bitorquatus. It is a southern Amazonian species, showing up around the lowlands area of northern Peru, north and central Bolivia and western and central Amazonian Brazil.The correct publication date of the species’ description and the species’ epithet spelling have been matter of a recent controversy.

Some argued that Pteroglossus beauharnaesii, treated in scientific literature as originally published by Johann Georg Wagler in Isis in 1832, was published earlier as Pteroglossus beauharnaisii by Wagler in 2831 in a daily Munich newspaper, Das Ausland, on 28 April 1831. Hence, beauharnaesii might be regarded as an incorrect subsequent spelling of beauharnaisii. However, others go against that reasoning, claiming that regardless being either an incorrect subsequent spelling of Pteroglossus beauharnaisii Wagler, 1831, or a universally used junior synonym, the name Pteroglossus beauharnaesii Wagler, 1832 need to be preserved as the valid name for the species according to Articles 23.9 and 33.3.1 of the International Code of Zoological Nomenclature (1999). Pteroglossus beauharnaesii was described by Wagler in honor of Prince August Karl Eugen Napoleon Beauharnais (1810–1835), Duke of Leuchtenberg.

In the original description, Johann Georg Wagler presented the type locality only as “Brasilia, prov. Pará”; and in Wagler's earlier work in 1831, he mentioned that Pteroglossus beauharnaesii was “collected in Pará” (“bei Para erlegten”), or “in vicinity of Para”. The holotype's label shows only “Pará” as locality. The specimen that Wagler based the description of P. beauharnaesii was possibly obtained by L. Riedel in 1829 on the Rio Madeira, and thus the locality presented by Wagler was imprecise, yet also not incorrect. In fact, until 1889 most of the Brazilian Amazon region was occupied by the enormous “Province Grão-Pará", commonly referred to only as "Pará". In addition, the type locality given by Wagler possibly indicated the place from where the material collected in Amazonia during the Langsdorff expedition was shipped, the current city of Belém, which was formerly known as “Pará”, capital of the homonymous province.

During the life span of only thirty-two years, Johann Georg Wagler had managed to bring forth many important contributions and discoveries to the scientific community that stands valid and uncontested until nowadays.

Publication

Source: Wikipedia (Johann Georg Wagler)


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