Additions to the Systematic Inventory of Non-Marine Molluscs Occurring in the State of Santa Catarina/SC, Central Southern Brazil Region

Based on the last list of non-marine molluscs from Santa Catarina State/SC published in March 2018, with 232 related forms, the current inventory of continental molluscs (land/terrestrial and limnic/freshwater) occurring in the State of Santa Catarina/SC is increased, with a new verified/confirmed registry of most other twenty (20) species (-fifteen (15) gastropods, thirteen (13) natives-Pomacea maculata Perry, 1810; Phyllocaulis sp (in determination process); Drepanotrema kermatoides (d’Orbigny, 1835); Anisancylus obliquus (Broderip & Sowerby, 1832); Drymaeus cf. paucipunctus (Pilsbry, 1898); Leiostracus cf. polygrammus (Moricand, 1836); Leiostracus sp (in determination process); Omalonyx matheroni (Potiez & Michaud, 1838); Peltella cf. palliolum (Férussac, 1821); Peltella iheringi Leme, 1968; Streptaxis cf. subregularis (Pfeiffer, 1846); Streptaxis cf. tumescens Suter, 1900; Gastrocopta cf. servilis (Gould, 1843); and two (2) non-native/exotic invasives forms Ovachlamys fulgens (Gude, 1900); Galba (-Lymnaea) truncatula (Müller, 1774); ...besides five (5) native bivalves-Diplodon charruana (d’Orbigny, 1835); Diplodon (-Rhipidodonta) suavidicus (Lea, 1856); Musculium argentinum (d’Orbigny, 1835); Eupera bahiensis (Spix, 1827); Cyanocyclas paranacensis (d’Orbigny, 1835) -), for a new total verified/ confirmed registry of 252 species and subspecies, sustained/consolidated product of complete 24 years of systematic field researches, examination of specimens deposited in collections of museums and parallel reference studies. Additional information regarding its known regional geographic distribution is incorporated/included.

Currently, the Central Southern Brazilian State of Santa Catarina/SC account with a diversity of non-marine molluscs (land/terrestrial and limnic/freshwater) comprising up to date a total of 252 species and subspecies related/registered, with 213 gastropods (166 land, 3 amphibious/limnophiles, 44 limnic) and 39 freshwater bivalves. Of this, 28 are exotic/non-natives (24 gastropods-1 amphibian/limnophile, 5 freshwater, 18 terrestrial-and 4 bivalves) and 25 are endemic gastropods, plus 17 forms that still require field confirmation/verification (only reported in the literature), whose territorial geo-spatial distribution has been constantly monitored and updated by us, being that their "ecological-functional" importance of it lies not only in the increasing number of taxa involved but rather in its role in the functioning of the ecosystems they occupy (... a regional aspect that is practically unknown/taken into consideration !), contributing to the cycling of nutrients in the environments where they occur, promoting the flow of matter and energy through their position in the trophic chains, either as prey of other organisms, as pollinators, as filterers and removers of water and sediments in aquatic environments (bioturbation), or as "gardeners" of forests etc etc, contributing directly and effectively to the maintenance "Guaramirim" (Voucher FURB-MO 361-"Rio Corticeirinha" Microbasin, Malacological region 2-North) & "Benedito Novo" (Voucher FURB-MO 370-"Benedito River" Microbasin), Malacological region 6-Itajaí Basin Valley [12]. FURB-MO: Malacological collection of Fundação Universidade Regional de Blumenau.

Discussion & Conclusions
In this new opportunity other twenty (20) non-marine/ continental mollusc species were confirmed and added to the last inventory available of Santa Catarina State/ SC (Agudo-Padrón 2018 a), increasing to 252 its number of registered forms regionally known, including today an total of 104 genera (91 Gastropoda & 13 Bivalvia) and 41 families (36 Gastropoda & 5 Bivalvia).
Additionally, soon after six (6) years of uncertainty and expectations, and based on timely observations of a bioecological nature from the follow-up of its natural life cycle (growth series/age development, from the egg/newborn to the reproductive adult), is established/revealed that the native STRO-PHOCHEILIDAE species Mirinaba fusoides (Bequaert, 1948) is the correct taxonomic specific identity of the mystery forest snail so far determined as AMPHIBULIMIDAE Plekocheilus (Eurytus) aff. rhodocheilus (Reeve, 1848) (Agudo-Padrón 2018 a: 56), based on young specimen occasionally photographed in the field on November 16, 2013 found in leaf litter of native Araucaria forest at "Itaiópolis" Municipal District (26°20'11"S & 49°54'23"W), case who clearly demonstrates (once again) the critical state of "unfamiliarity" that still prevails among us of the natural balance.
When it comes to regional research with molluscs, the Santa Catarina State/SC historically have focused their effort and interest almost uniquely in the research and development of the creation/production of marine forms capable of comercial handling. Other general aspects of their knowledge are practically ignored and/or relegated to a background (57, 58) [1,14].
Ecology and natural history of neotropical land snails, by example, is almost unknown (... see our previous comment about the regional case of "mystery forest snail" !). It is necessary and urgent to recognize, valorization and attention to the study and reach of in depth knowledge about the "funtional ecological importance" of this particular biodiversity, due to its relations with the "responsiveness" to the environmental variation (bioindicators) and its impact on ecosystems processes, through weighted assessments and sober of the threat categories they currently present, as well as their spatial and altitudinal distribution in the State (... this latter work, in parallel to the systematic inventory, carried out since 1996 by us !), ... key information for answering ecological and evolutionary questions, modeling the response of the species involved to estimated anthropogenic changes for the next decades, and designing conservation strategies that are really valid for this who is one of the most vulnerable wildlife groups in our region and in Brazil in general.