Tyrannoseira bicolorcornuta ( Bellini, Pais & Zeppelini, 2009 )

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: 218-224

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Tyrannoseira bicolorcornuta ( Bellini, Pais & Zeppelini, 2009 )


Tyrannoseira bicolorcornuta ( Bellini, Pais & Zeppelini, 2009) 

Figs 1View FIGURE 1 B–D, 2–6, 14–18, 34

Seira bicolorcornuta Bellini, Pais & Zeppelini, 2009: 40  , figs. 1–4 (orig. descr.).

Type locality. Brazil, Pernambuco State, Alto do Moura .

Other references: Barra 2010: 586, 592 (species compared); Abrantes et al. 2010: 9 (cat.).

Tyrannoseira bicolorcornuta  ; Bellini & Zeppelini 2011: 547, fig. 2b (comb.).

Bellini & Godeiro 2012: 84 (species compared); Abrantes et al. 2012: 12 (cat.); Zeppelini & Lima 2012: 42–43 (species compared).

Type material examined. Holotype male and paratypes 7 females (MNRJ/3169), before fire in September 2018.

Typological note. The type material of T. bicolorcornuta  , deposited at MNRJ, was destroyed by fire in September 2018, except for one female paratype (MNRJ /3169). This paratype is here designated as the neotype of the species, following ICZN (2000) (see the code chapter 16, article 72.4.5.).

Other material examined. 1 male, 1 female and 1 juvenile on slides ( CC / UFRN): Brazil, Paraíba state, Cacimba de Dentro municipality, “Cachoeira da Capivara” farm , 06°40’S, 35°45’W, 314 m, 15.iv–17.v.2008, entomological aspirator, BC Bellini coll.GoogleMaps  3 females on slides, 5 specimens coated and 15 specimens in alcohol ( CC / UFRN): Sapé municipality, urban region , 07°06’18”S, 35°14’03”W, 105 m, 17.iii.2014, entomological aspirator, DD Silva coll.GoogleMaps  1 male and 1 female on slides and 1 specimen in alcohol ( INPA): Bananeiras, State Ecological Reserve of “Goiamunduba” , 06°44’12”S, 35°36’35”W, 474 m, 19.iii.2014, entomological aspirator, DD Silva coll.GoogleMaps  3 males and 5 females on slides and 37 specimens in alcohol ( CC / UFRN): Rio Grande do Norte, Apodi municipality, Lajedo de Soledade , 05°35′20″S, 37°49′53″W, 123 m, 22.iv.2014, entomological aspirator, NN Godeiro & DD Silva coll.GoogleMaps  2 males and 10 females on slides and 22 specimens in alcohol ( CC / UFRN): Tibau do Sul municipality, “Pipa” Beach , 06°13'36.7"S, 35°04'29.9"W, 39 m, 21.vi.2015, entomological aspirator, NN Godeiro coll.GoogleMaps  3 males and 4 females on slides and 31 specimens in alcohol ( CC / UFRN): Ceará, Quixadá municipality, 04°57'35.1"S, 39°00'25.8"W, 180 m, 18–20.iv.2014, entomological aspirator, NN Godeiro & DD Silva coll.GoogleMaps 

Diagnosis. Body dark blue with pigment on distal two-thirds of Ant II–IV ( Figs 1View FIGURE 1 B–D); Ant III with 1 subapical sens type– f ( Fig. 14AView FIGURE 14); head chaetotaxy with An 3i mic, An 3i 2 and A4 absent and with 2 posterior mac (Pe3 and 1 uncertain) ( Fig. 14BView FIGURE 14); clypeus with l2 acuminate, f2 smaller ( Fig. 14CView FIGURE 14); outer labral papilla reduced ( Fig. 14DView FIGURE 14); postlabial formula with 1 chaetae below ‘J’ row ( Fig. 14EView FIGURE 14); Th II with 4 anterior mac (a5, a5p, a 5i, a 5i 2), m 1i and p 1i 2 mac present or absent, p1ip mac present, p2ea2 mac absent ( Fig. 15AView FIGURE 15); Th III with 2 lateral mac (m6–6p) ( Fig. 15BView FIGURE 15); Abd IV with 5 antero-central mac (A3, B2–3, C1, T1) and 4 mac (Fe3–6) in Fe series ( Fig. 16AView FIGURE 16); trochanteral organ with about 19 spine-like chaetae ( Fig. 17DView FIGURE 17); leg I of males with 9–19 thin femoral spines and 5 finely ciliate tibiotarsal spines ( Fig. 17EView FIGURE 17); collophore anteriorly with 4 apically acuminate mac and 2 distal ma; posteriorly with 3 spines and 1 distal smooth chaeta ( Fig. 18AView FIGURE 18); manubrial ventral formula with 1, 0, 0, 2/ 2 and 12 ciliate chaetae, manubrial plate with 3 psp ( Figs 18View FIGURE 18 B–C).

Redescription. Total length (head + body) of the holotype 1.49 mm. Specimens dark blue, pale from Ant I to proximal half of Ant II, proximal one-third of Ant III–IV, trochanter to tibiotarsus, distal collophore and distal twothirds of dens; eyepatches black ( Fig 1BView FIGURE 1). Specimens sometimes with weaker pigmentation ( Fig. 1CView FIGURE 1). Specimen dried to critical point to same colour pattern, but antennae and legs yellowish ( Fig. 1DView FIGURE 1). Scales present on Ant I to basal half of Ant III, dorsal and ventral head, Th and Abd dorsally, legs (except claws), anterior collophore, and ventrally on manubrium and dens.

Head with antennal ratio as I: II: III: IV = 1: 1.92: 2.09: 2.63. Ant III apical organ with 2 sens type a, 3 guard sens (type d), 1 modified rounded sens (type f), sens of different sizes (type b –d) and chaetae types g –h ( Fig. 14AView FIGURE 14). Eye A largest, G and H smaller, others subequal ( Fig. 14BView FIGURE 14). Head dorsal chaetotaxy with 11 ‘An’, 5 ‘A’, 5 ‘M’, 5 ‘S’, 3 ‘Ps’, 6 ‘Pa’, 2 ‘Pm’, 6 ‘Pp’, 3 ‘Pe’ chaetae plus 1 mac of uncertain homology ( Fig. 14BView FIGURE 14). Clypeal formula with 4 (l1–2), 4 (f1–2), 3 (pf0–1) ciliate chaetae, l1–2 larger and apically acuminate, f2 smaller ( Fig. 14CView FIGURE 14). Outer labral papillae reduced ( Fig. 14DView FIGURE 14). Ventral chaetotaxy with 11 ciliate chaetae, anterior postlabial formula with 4 (G1–4), 2 (H2–3), 3 (J1–3) plus 1 chaeta below ‘J’ series, basal chaeta (b.c.) larger ( Fig. 14EView FIGURE 14).

Thoracic chaetotaxy ( Figs 15View FIGURE 15 A–B) with Th II series ‘a’, ‘m’ and ‘p’ with 6, 12 and 17 chaetae, respectively (m 1i, p 1i 2 and p2p as mac or mic); Th III, series ‘a’, ‘m’ and ‘p’ with 8, 6 and 7 chaetae, respectively. Th II: III ratio as 1.36: 1.

Abdominal chaetotaxy ( Figs 15View FIGURE 15 C–E, 16View FIGURE 16 A–B). Abd I, series ‘a’, ‘m’ and ‘p’ with 5, 5 and 2 mic, respectively. Abd II, series ‘a’, ‘m’ and ‘p’ with 5, 7 and 3 chaetae, respectively; chaeta el present, bothriotricha a5 and m2 with 5 and 4 accessory chaetae respectively. Abd III, series ‘a’, ‘m’ and ‘p’ with 5, 7 and 6 chaetae, respectively; 4 accessory chaetae around bothriotrichum m2, and 10 between bothriotricha a5 and m5. Abd IV with 9 medial mac of series ‘A’ to ‘T’ (A3, A5, B2–6, C1, T1), and 15 lateral mac of series ‘E’ to ‘Fe’ (E2–4p, Ee10, F1–3p, Fe3–6); postero-median face with 8 sens and 4 posterior mes. Abd V, series ‘a’, ‘m’, ‘pa’, ‘p’ and ‘pp’ with 4, 6, 3, 6 and 4 chaetae, respectively. Abd III: IV ratio as 1: 4.08.

Legs with subcoxa I carrying 3 ciliate chaetae and 2 psp; subcoxa II with an anterior row of 8 chaetae, posterior row with 2 chaetae and 3 psp; subcoxa III with one row of 9 chaetae and 2 posterior psp ( Figs 17View FIGURE 17 A–C). Trochanteral organ with 19 spine-like chaetae ( Fig. 17DView FIGURE 17). Femur I of males with 9–19 (9 in holotype) thin spines ( Fig. 17EView FIGURE 17). Tibiotarsus I with one row of 10 inner chaetae, 5 proximal finely ciliate spines (2 short and 3 larger) and 5 distal spine-like mac heavily ciliate and apically acuminate ( Fig. 17EView FIGURE 17). Unguis with median tooth marginally larger than basal teeth, apical tooth smaller; ratio unguis: unguiculus = 1: 0.61. Tibiotarsus III with “smooth” chaeta, 0.85 shorter than unguiculus; tenent hairs 0.92 shorter than ungues outer face ( Figs 5View FIGURE 5 D–G).

Collophore ( Fig. 18AView FIGURE 18) with anterior face carrying 9 chaetae, 2 distal mac of same length, 4 longer and acuminate and 3 proximal spine-like chaetae; posterior face with 4 chaetae, 3 spines and 1 distal smooth chaeta; lateral flap with about 5 smooth and 11 ciliate chaetae.

Furcula ( Figs 18View FIGURE 18 B–C) with ventral manubrium of formula 1, 0, 0, 2/ 2 (subapical) and 12 (apical) ciliate chaetae, outer subapical chaeta shorter than inner chaeta, apical inner chaeta shorter; manubrial plate (dorsally) with 4 ciliate chaetae and 3 psp.

Remarks. The modified legs of T. bicolorcornuta  were originally described from a single, apparently subadult, male specimen, and for this reason the variation in number of femoral spines of leg I are described here. The specimens from Bananeiras (Paraíba) have 9 femoral spines, as well as the holotype ( Fig. 17EView FIGURE 17). This number may be fewer in subadult males from Cacimba de Dentro (Paraiba) and Tibau do Sul (Rio Grande do Norte), as leg I has 4 and 7–8 femoral spines in these specimens respectively. Adults of T. bicolorcornuta  from other localities have between 13–19 femoral spines, similar to T. gladiata  , but this latter species can have 24 spines ( Fig. 27EView FIGURE 27). Consequently, this characteristic cannot be used to separate species ( Table 1)


Brazil, Amazonas, Manaus, Instituto Nacional de Pesquisas da Amazoonia, Colecao Sistematica da Entomologia














Tyrannoseira bicolorcornuta ( Bellini, Pais & Zeppelini, 2009 )

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

Tyrannoseira bicolorcornuta

Bellini, B. C. & Zeppelini, D. 2011: 547