Catalogue of Ditomyiidae and Diadocidiidae (Diptera: Bibionomorpha) types housed in the collection of the Museu de Zoologia da Universidade de São Paulo, Brazil

The Museu de Zoologia da Universidade de São Paulo (MZUSP), São Paulo, Brazil houses the largest and most representative Brazilian collection of Diptera. In the present study, following a recommendation of the International Code of Zoological Nomenclature, it is presented a catalogue of the type specimens of Diadocidiidae and Ditomyiidae (Diptera: Bibionomorpha) held in the collection of the MZUSP. Label data and the condition of preservation of 27 type specimens (nine holotypes, two paralectotypes, and 16 paratypes) of 14 Neotropical species are provided. Key-Words. Nomenclature; Scientific collections; Taxonomy; Type specimens.


INTRODUCTION
Brazil is one of the world's most biodiversity-rich countries and most of their more important scientific collections are deposited in the Museu de Zoologia da Universidade de São Paulo (MZUSP), São Paulo, Brazil. The MZUSP started activities in the second half of the 19 th century and since then assumed a leading position in the world scenario. The MZUSP zoological collection has about 11 million specimens collected over the great morphoclimatic domains and Brazilian seas, as well as expeditions to other countries, although mostly from the Neotropical region (Tavares et al., 2015). The Diptera collection at this institution is the largest and the most representative in Brazil (Carvalho et al., 2002) being the largest and most important depository for Neotropical Diptera in Brazil and in South America. Additional information on the collection is available at www.mz.usp.br.
Ditomyiidae, as well as Diadocidiidae, are families of gnats belonging to the suborder Bibionomorpha. The family comprises eight genera and more than 100 species described worldwide (Vockeroth, 2009a), but absent in the Afrotropical region. In the Neotropical region, four genera and 35 species are recorded (Munroe, 1974, Papavero, 1977bAmorim et al., 2002;. Catalogues of the Neotropical and regional faunas (Argentina, Colombia and Brazil) of Ditomyiidae were presented, respectively by Papavero (1977b), Falaschi & Amorim (2014a) and Falaschi (2016aFalaschi ( , 2019b. Following a recommendation of the International Code of Zoological Nomenclature (ICZN, 1999: 72F.4), the present paper provides a catalogue with information on 27 type specimens (nine holotypes, two paralectotypes and 16 paratypes) of 14 Neotropical species of the families Diadocidiidae (one species) and Ditomyiidae (13 species) held in the collection of the MZUSP (Table 1).

Condition of holotype:
Pinned. Right wing and male terminalia on a permanent slide; broken undetermined legs glued on triangle. Missing parts: undetermined legs.

Condition of paratype:
Pinned. Left wing left fore and mid legs on the permanent slide; female terminalia slide-mounted on coverslips, pinned with the specimen. Missing parts: none.
Condition of paratype: Pinned. Antennae damaged; right wing and left mid leg on the permanent slide 1; male terminalia on the permanent slide 2. Missing parts: none.

Condition of paratype:
Pinned. Male terminalia on the permanent slide. Missing parts: right fore and mid femora, tibiae and tarsi.

Condition of holotype:
Pinned. Terminalia slide-mounted on coverslips, pinned with the specimen; right wing broken on the permanent slide; abdomen and hind legs in microvial. Missing parts: right antenna.