BRAZILIAN METAZOA ABSENT LINEAGES ✅

LAST UPDATED IN 29.09.2024
⋵: 'ENDEMICS'

Brazilian 28 absent Metazoa canonic lineages are (1) Xenoturbellida, (2) Nemertodermatida, (3) Filospermoidea, (4) Seisonida, (5) Orthonectida, (6) Rhomboza/Dicyemida, (7) Craniida, (8) Phoronopsis, (9) Monoplacophora, (10) Meiopriapulomorpha, (11) Peripatopsidae, (12) Rhabdopleurida, (13) Asymmetron, (14) Epigonichthys, (15) Hoilungia, (16) Polyplacotoma, (17) Polypodiozoa, (18) Micrognathozoa, (19) Gnosonesimida, (20) Haplopharyngida, (21) Cycliophora, (22) Loxokalypodida, (23) Mesotardigrada, (24) Remipedia, (25) Petromyzontii, (26) Cladistii, (27) Coelacantha and (28) Rhynchocephalia (Brazilian Metazoa, 2023).

BRAZILIAN ABSENT PHYLLA WORLDWIDE, INCLUDING PHYLOGENETIC ISSUES

Nine are monotypics., three are diotypics (Coelacantha 1:1/2 Loxokalypodida 1:1/2 and Cycliophora 1:1/2) and remaining from 3 to 127 spp.: Peripatopsidae (1:41/127), Dicyemida, (3:9/115), Petromyzontii (3:10/48), Monoplacophora (4:8/30), Remipedia (8:12/28), Filospermoidea (2:3/28), Orthonectida (2:5/26), Cladistii (1:2/14), Meiopriapulomorpha (1:1/12), Craniida (1:3/11), Nemertodermatida (2:6/9), Xenoturbelllida (1:1/6), Gnosonesimida (1:1/6), Rhabdopleurida (1:1/5), Seisonida (1:2/4), Phoronopsis (1:1/3) and Haplopharyngida (1:1/3).

Joined, these groups has (46:119/)493 spp.

FULL MAP OF RANGE OF ALL BRAZILIAN METAZOA LINEAGES (UPDATED IN 10 MAR, 2024)

ANIMAL OUTER FAMILIES NEAR BRAZIL

LAST UPDATED IN 29.09.2024

Two mammal families was collected near Brazilina borders, and maybe collected also in country. Both was collected in NE Argentina, near Brazilian border at western bank of Uruguay river, in Rio Grande do Sul state. Lagostomus maximus Desmarest, 1817, belong to rodent family Chinchilidae, a family absent in Brazil, and also occur in Bolivia and Paraguay; Chacodelphys formosa Shamel, 1930, is a marsupial from Didelphidae family, and is a endemic genus for Argentina.

ARGENTINAN RANGE OF LAGOSTOMUS (BLUE DOTS, ECOREGISTROS) AND CHACODELPHYS (PINK DOTS, TETA & PARDINAS, 2007, SEE)

SMALLEST VERTEBRATES FROM BRAZIL✅

LAST UPDATED IN 29.09.2024
⋵: 'ENDEMICS'

Brazil is the world's hotspot for miniaturized Craniata, with the smallest members of Squamata, Amphibian and Actinopterigii from across continental America being endemic to Brazil. More than that, our smallest Amphibia and Actinopterigii are the smallest in the entire Western Hemisphere and are among three of their groups worldwide. The smallest Brazilian Squamata is second in New World only to some nanolizards in the Caribbean on the continent.

Actinopterigii ▸ two of the three smallest Actinipterigii are two Brazilian species from endemic genus Leptophilypnion (Eleotridae): L. fittkaui T. R. Roberts, 2013 known only from Rio Negro in Amazonas state, and L. pusillus T. R. Roberts, 2013 known only from Tapajós River in Pará state (Roberts et al., Intenational Journal of Ichthyology, 2013), with mature lengts of 9.1 to 9,3mm. Over a hundred of Neotropical fishes run as miniaturized, with mature age below 26mm (Piza et al., Neotropical Ichtyology, 2014).

Amphibia ▸ Brachycephalus pulex Napoli, Caramaschi, Cruz & Dias, 2011, found only in southern Bahia, may be even smaller, with adults measuring just 7.1 mm on average, 1 mm lesser Paedophryne amauensis from Papua New Guinea, being the smallest known vertebrate for several sources (Revista Fapesp).

Squamata ▸ smallest Squamata from Brazil and South America, possibly in mainland New World, is Coleodactylus natalensis Freire 1999 (Sphaerodactylidae), known only from remants of Atlantic Forest in Rio Grande do Norte state, NE Brazil, with males and females reach a maximum snout-vent length of 22 and 24 mm (Lisboa, Sales & Freire, Zoologia, 2012). Other species in this genus are very small, and are distributed from Venezuela, Guianas and Brazil except southern parts. Miniaturized lizards also occur in Gymnophthalmidae.