Tyrannoseira sex Bellini & Zeppelini, 2011,

Cipola, Nikolas Gioia, Morais, José Wellington De, Godeiro, Nerivania Nunes & Bellini, Bruno Cavalcante, 2019, Taxonomic revision of Brazilian genus Tyrannoseira Bellini & Zeppelini, 2011 (Collembola, Entomobryidae, Seirinae), Zootaxa 4586 (2), pp. 201-248: 235-241

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Tyrannoseira sex Bellini & Zeppelini, 2011


Tyrannoseira sex Bellini & Zeppelini, 2011 

Figs 1FView FIGURE 1, 29–34View FIGURE 29View FIGURE 30View FIGURE 31View FIGURE 32View FIGURE 33View FIGURE 34

Tyrannoseira sex Bellini & Zeppelini, 2011: 553  , figs. 4–6 (orig. descr.).

Type locality. Brazil, Paraíba State, São João do Cariri , Furna dos Ossos.

Other references: Abrantes et al. 2012: 13 (cat.). Bellini & Godeiro 2012: 84 (species compared). Zeppelini & Lima 2012: 41–43 (species compared).

Type material examined. Holotype male, paratypes 1 male and 5 females (MNRJ/2175).

Typological note. In the original description 6 paratypes deposited in MNRJ were reported but we counted a total of 9 specimens along with paratypes slides. All type material of T. sex  deposited at MNRJ was destroyed in fire in September 2018.

Other material examined. 3 males, 4 females and 2 juveniles on slides ( MNRJ / 2175): same date of type series. All specimens destroyed in fire in September 2018  .

Diagnosis. Body with pigmentation reduced ( Fig. 1FView FIGURE 1); Ant III without sens type– f ( Fig. 29AView FIGURE 29); head chaetotaxy without An 3i and An 3i 2 mic, A4 present and with 2 posterior mac (Pe3 and 1 uncertain) ( Fig. 29BView FIGURE 29); clypeus with l1 not apically acuminate, f2 normal ( Fig. 29CView FIGURE 29); outer labral papilla gently smaller (as Fig. 24DView FIGURE 24); postlabial formula with 2 chaetae below ‘J’ row ( Fig. 29DView FIGURE 29); Th II with 6 anterior mac (a4+, a 4i, a5, a5p, a 5i, a 5i 2), m 1i, p 1i 2 and p1ip mac present, p1ip2 and p2ea2 mac present or absent ( Fig. 30AView FIGURE 30); Th III with 1 lateral mac (m6) ( Fig. 30BView FIGURE 30); Abd IV with 5–6 antero-central mac (A3, B1–3, C1, T1) and 4 mac (Fe2–5) in Fe series ( Fig. 31AView FIGURE 31); trochanteral organ with 23–28 spine-like chaetae ( Fig. 32DView FIGURE 32); leg I of males with 8–11 thin femoral spines and 5 tibiotarsal spines finely ciliate ( Figs 32View FIGURE 32 E–F); collophore anteriorly with 4 mac apically acuminate and 1 distal mac, posteriorly with 2 spines, 1 distal ciliate and 1 smooth chaetae ( Fig. 33AView FIGURE 33); manubrium ventral formula with 1, 0, 2, 2/ 4 and 12 ciliate chaetae, manubrial plate with 2 psp ( Figs 33View FIGURE 33 B–C).

Redescription. Total length (head + body) of the holotype 1.96 mm. Colour pale yellow with light purple pigment on Ant II-IV and one dark blue spot on anterior head; eyepatches black ( Fig. 1FView FIGURE 1). Scales present on Ant I to basal one-third of Ant III, dorsal and ventral head, Th and Abd dorsally, legs (except claws), anterior collophore and manubrium and dens ventrally.

Antennal ratio as I: II: III: IV = 1: 1.43: 1.53: 1.79. Ant III apical organ with 2 sens type a, 3 guard sens (type d), sens of different sizes (type b –d) and chaetae types g –h; sens type– f absent ( Fig. 29AView FIGURE 29). Eyes A larger, G smaller, others subequal ( Fig. 29BView FIGURE 29). Head dorsal chaetotaxy with 12 ‘An’, 6 ‘A’, 5 ‘M’, 5 ‘S’, 3 ‘Ps’, 6 ‘Pa’, 2 ‘Pm’, 6 ‘Pp’, 3 ‘Pe’ chaetae plus 1 mac of uncertain homology ( Fig. 29BView FIGURE 29). Clypeal formula with 4 (l1–2), 4 (f1–2), 3 (pf0–1) ciliate chaetae, l1–2 larger, others subequal ( Fig. 29CView FIGURE 29). Outer labral papillae gently smaller than inner papillae (as Fig. 24DView FIGURE 24). Ventral chaetotaxy with 13 ciliate chaetae, anterior postlabial formula with 4 (G1–4), 3 (H2–4), 4 (J1–4) plus 2 chaetae below ‘J’ series, basal chaeta (b.c.) larger ( Fig. 29DView FIGURE 29).

Thoracic chaetotaxy ( Figs 30View FIGURE 30 A–B) with Th II, series ‘a’, ‘m’ and ‘p’ with 8, 12 and 17–18 chaetae, respectively, m 1i, p 1i 2 and p1ip mac present, p1ip2 and p2ea2 mac present or absent. Th III, series ‘a’, ‘m’ and ‘p’ with 8, 6 and 7 chaetae, respectively. Th II: III ratio as 1.44: 1.

Abdominal chaetotaxy ( Figs 30View FIGURE 30 C–E, 31View FIGURE 31 A–B) with Abd I, series ‘a’, ‘m’ and ‘p’ with 5, 5 and 2 mic, respectively. Abd II, series ‘a’, ‘m’ and ‘p’ with 6, 7 and 3 chaetae, respectively; chaeta el absent or not seen, bothriotricha a5 and m2 with 7 and 4 accessory chaetae respectively. Abd III, series ‘a’, ‘m’ and ‘p’ with 6, 7 and 6 chaetae, respectively; 4 accessory chaetae around bothriotrichum m2, and 10 between bothriotricha a5 and m5. Abd IV with 9–10 medial mac of series ‘A’ to ‘T’ (A3, A5, B1–6, C1, T1), and 14 lateral mac of series ‘E’ to ‘Fe’ (E2–4p, Ee10, F1–3, Fe2–5); postero-median face with 6 sens and 4 posterior mes. Abd V, series ‘a’, ‘m’, ‘pa’, ‘p’ and ‘pp’ with 4, 6, 4, 7 and 4 chaetae, respectively. Abd III: IV ratio as 1: 3.27.

Legs with subcoxa I carrying 3 ciliate chaetae and 2 psp; subcoxa II with an anterior row of 9 chaetae, posterior row with 3 chaetae and 3 psp; subcoxa III with one row of 8 chaetae and 2 posterior psp ( Figs 32View FIGURE 32 A–C). Trochanteral organ with 23–28 spine-like chaetae ( Fig. 32DView FIGURE 32). Femur I of males with 8–11 thin spines, holotype with 11 ( Figs 32View FIGURE 32 E–F). Tibiotarsus I with one row of 10 inner chaetae, 5 proximal spines finely ciliate (3 short and 2 larger) and 5 distal spine-like mac heavily ciliate and apically acuminate ( Fig. 32EView FIGURE 32). Unguis with median tooth discretely larger than basal teeth, apical tooth smaller; ratio unguis: unguiculus = 1: 0.50. Tibiotarsus III with “smooth” chaeta 1.22 larger than unguiculus; tenent hairs 0.83 smaller than ungues outer face (as Fig. 12GView FIGURE 12).

Collophore ( Fig. 33AView FIGURE 33) with anterior face carrying 10 chaetae, 1 distal mac, 4 longer and acuminate, 2 acuminate mes and 3 proximal spine-like chaetae; posterior face with 4 chaetae, 2 spines and 1 distal ciliate and 1 smooth chaeta; lateral flap with about 6 smooth and 5 ciliate chaetae.

Furcula ( Figs 33View FIGURE 33 B–C) with ventral manubrium of formula 1, 0, 2, 2/ 4 (subapical) and 12 (apical) ciliate chaetae, subapical chaetae of same size, apical inner chaeta smaller; dorsal manubrial plate with 4 ciliate chaetae and 2 psp.

Remarks. Tyrannoseira sex  most resembles T. diabolica  in having reduced pigmentation and general morphology. Differences are shown in Table 1.


Brazil, Rio de Janeiro, Sao Cristovao, Universidade do Rio Janeiro, Museu Nacional














Tyrannoseira sex Bellini & Zeppelini, 2011

Cipola, Nikolas Gioia, Morais, José Wellington De, Godeiro, Nerivania Nunes & Bellini, Bruno Cavalcante 2019