Pseudosinella guanhaensis Zeppelini & Brito & Lima 2018, sp.nov.
Creators: name: Zeppelini, Douglas
name: Brito, Roniere A.
name: Lima, Estevam C. A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Pseudosinella
Pseudosinella guanhaensis

description: Pseudosinella guanhaensis sp.nov.   
Figs 26–39, Table 1 and 2  
 Type material. Holotype adult male on slide, Brazil, Minas Gerais, Dores de Guanhães (42°55'44" W; 19°03'28" S), granitic cave (cav.2), 29–31.V.2017, leg. Spelayon Team. Holotype deposited at the CRFS-UEPB # 10507.   
Paratype adult male on slide, Brazil, Minas Gerais, Dores de Guanhães (42°55'44" W; 19°03'28" S), granitic cave (cav.2), 29–31. V.2017, leg. Spelayon Team, CRFS-UEPB # 10508.  
 Description. Color Pattern: White, without pigment. Total length of Holotype (Head and Body) 706µm (Table 1). Scale present on head, body and ventral face of furca; absent from antennae, legs and collophore.   
 Head: Eyes absent. Antennae ~ 1.2× head length. Ant. I–IV with many sensilla of diferent types, microchaetae and macrochaetae (Figs 17, 26–33). Ant. IV apical papilla absent; subapical sense organ with shelf sensillum type a (Fig. 26), guard sensillum shorter than shelf sensillum. Apical sense organ of Ant. III with two type c, three type e and one type h sensilla, and surrounded by macrochaetae (Figs 27 and 30). Ant II dorso-laterally with about 20 macrochaeta and 2 type j sensilla at the ventro-lateral distal half (Figs 28, 29 and 31). Ant. I dorso-laterally with 3 type h, 1 type i and 1 type a sensilla, and 2 h and 3 l ventro-lateral sensilla (Figs 28, 29, 32 and 33). Head dorsally with 1 mesochaetae and 6 macrochaetae in series An; anterior unpaired A0–1 and paired A2–3 as macrochaetae, paired A5 as microchaeta, A4 absent. Posterior r, Pa5, Pm1, Pp1–2 and Pe1–2 are macrochaetae (Fig. 34). Prelabral chaetae Pl,p,m,a 6,5,4,4 Pl and p ciliated,m and a smooth. Distal margin of labrum smooth. Basal and distal chaetae of maxillary palp smooth and subequal; lateral process of labial papilla E (sensillum Ip) curved anteriorly, barely exceeding the tip of papillae. Labial triangle chaetotaxy as A1–5 M1M2–EL1L2 (Fig. 35). Postlabial area with 11 macrochaetae each side.   
 Body: Body macrochaetae 00/0100+1. Meso and metathorax sensilla as short and slender (Figs. 36). Abd. I a1, a2, a3, a5, short a6, m2, m3, m4 and p5 present, as absent. Abd. II Tm2 and Tm5 with 3 and 2 fun shaped chaetae (a2i–iii and a6i–ii), setaceous a3, as microsensillum present, m3 is a macrochaeta. Abd. III with macrochaetae pm6; trichobothria Tm2, Ta5 and Tm5 with 3,1,0 fan-shaped supplementary chaetae; a3 internal, reaching as; as slender, slightly bigger than m3; sensilla d2 present (Fig. 36). Abd. IV inner macrochaeta B5 and T2 present, C1 normal; macrochaeta B5 posterior to pseudopore and to T4. Trichobothrial complex a and m chaetae present, s absent, supplementary chaetae a, m fan-shaped; chaetae D1, D1p and D2 slender, about the same size of other chaetae in tricobothrial complex. D4, E2–4 and F5 lateral macrochaetae present (Fig. 37).   
Legs: Metatrochanteral organ with up to 6 short chaetae in a V shape. Legs I–III (respectivelly) bearing 1,2,2 heavy, blunt, stout, ciliated macrochaetae on posterior edges (Fig. 38). Third unguis as in Fig. 39, tenent hair flat and truncate, 1.3× as long as unguiculus; all ungues with 1 unpaired apical and 1 paired basal inner teeth. Unguiculus elongated with a strong tooth in the outer lamella (Fig. 39).  
Furca: Manubrium with up 32 ciliated, 4 smooth mesochaetae and 2 pseudopore. Chaetae of dens all ciliated. Mucro with 2 teeth, distal teeth slightly smaller than basal one, basal spine long and smooth, reaching the tip of basal tooth.  
 Etymology. The species is named after its type locality ‘ Dores de Guanhaes ’.   
 Distribution and habitat. Good’s Biogeographic zone 27 (Good 1974; Culik & Zeppelini 2003), the climate is ‘as’ (Köppen 1936; Shear 1966). The species is known so far from a gneiss cave (cav 2) in Dores de Guanhaes in Minas Gerais State Southeastern Brazil. The type locality is a shallow cave with about 10m ² in the Dores de Guanhães river bank, composed of fallen boulders. There is no aphotic zone and the abiotic conditions are rather those of the external surroundings. The species is likely a MSS dweller which showed up eventually in the external environment, this may explain the small number of specimens collected. The temperature in the cave ranged from 18–22.8C° and humidity from 85–88% along the year, with lower temperatures during drier season.   
 Remarks. Pseudosinella guanhaensis sp. nov. presents the blunt, ciliated macrochaetae on Tita as seen in P. meganporteri (Soto-Adames 2010), the new species bears 1–2–2 and the later 2–2–2 macrochaetae in legs I–III respectively. The tenant hair is flat clavate in the new species and acuminate in P. meganporteri. The presence of macrochaetae S and T on the head is also similar in these two species and is also seen in P. ambigua sp. nov. The absence of chaeta r in the labial triangle differentiates P. guanhaensis sp. nov. from those species and is similar to the species P. sera and P. certa. The clavate tenant hair is shared by P. ambigua sp. nov., P. pseudopetterseni and P. sera, the macrochaetae on the Abd. I–IV is differential for the new species (Table 2) and the presence of blunt macrochaetae on Tita can easily diagnose P. guanhaensis sp. nov. from those species.
description: Published as part of Zeppelini, Douglas, Brito, Roniere A. & Lima, Estevam C. A., 2018, Three new species of Collembola (Arthropoda: Hexapoda) from Central Brazilian shallow caves: side effects of long term application of environmental law on conservation, pp. 59-81 in Zootaxa 4500 (1) on pages 73-78, DOI: 10.11646/zootaxa.4500.1.3, http://zenodo.org/record/5296753