Tyrannoseira diabolica Bellini & Godeiro 2012

Tyrannoseira diabolica Bellini & Godeiro, 2012

Figs 1E, 19–23, 34

Tyrannoseira diabolica Bellini & Godeiro, 2012: 81, figs. 1–13 (orig. descr.).

Type locality. Brazil, Rio Grande do Norte state, Parnamirim, Barreira do Inferno.

Other references: Zeppelini & Lima 2012: 41–43 (species compared).

Type material examined. Holotype female, paratypes 1 male, 8 females and 1 juvenile (MNRJ/3170), examined before of fire in September 2018.

Typological note. One paratype was designed as female in original description and we correct it here as it is a juvenile. All type material of T. diabolica deposited at MNRJ was destroyed in fire in September 2018.

Diagnosis. Body pale with irregular purple pigment on Ant distally and Th II to Abd IV (Fig. 1E); Ant III without sens type– f (Fig. 19A); head chaetotaxy with An 3i mic, An 3i 2 and A4 absent and with 1 posterior mac (Pe3) (Fig. 19B); clypeus with l2 acuminate, f2 smaller (Fig. 19C); outer labral papilla subequal to inner papillae (as Fig. 8E); postlabial formula with 3 chaetae below ‘J’ row (Fig. 19D); Th II with 6 anterior mac (a4+, a 4i, a5, a5p, a 5i, a 5i 2), m 1i and p 1i 2 mac absent, p1ip mac present, p2ea2 mic present (Fig. 20A); Th III with 2 lateral mac (a6, m6) (Fig. 20B); Abd IV with 4–5 antero-central mac (A3a, A3, B3, C1, T1) and 4 mac (Fe2–5) in Fe series (Fig. 21A); trochanteral organ with 18 spine-like chaetae (Fig. 22D); leg I of males with 6–8 thin femoral spines and 4 finely ciliate tibiotarsal spines (Fig. 22E); collophore anteriorly with 3 apically acuminate mac and 1 distal mac, posteriorly with 1 spine and 1 distal smooth chaeta (Fig. 23A); manubrium ventral formula with 1, 0, 2, 0/ 2 and 12 ciliate chaetae, manubrial plate with 3 psp (Figs 23 B–C).

Redescription. Total length (head + body) of the holotype 1.25 mm. Colour pale yellow with purple pigment on distal Ant III–IV, one dark spot laterally on anterior head, and Th II to Abd I, and weakly on Abd II–IV; eyepatches black (Fig. 1E). Scales present on Ant I to basal half of Ant III, dorsal and ventral head, dorsally on Th and Abd, legs (except claws), anterior collophore, and ventrally on manubrium and dens.

Antennal ratio as I: II: III: IV = 1: 1.89: 1.85: 2.96. 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. 19A). Eyes A and B larger, G smaller, others subequal (Fig. 19B). Head dorsal chaetotaxy with 11 ‘An’, 5 ‘A’, 5 ‘M’, 5 ‘S’, 3 ‘Ps’, 6 ‘Pa’, 2 ‘Pm’, 6 ‘Pp’ and 2 ‘Pe’ chaetae (Fig. 19B). Clypeal formula with 4 (l1–2), 4 (f1–2), 3 (pf0–1) ciliate chaetae, l2 larger, l1 apically acuminate, f2 smaller, others subequal (Fig. 19C). Outer labral papillae subequal to inner papillae (as Fig. 8E). Ventral chaetotaxy with 13 ciliate chaetae, anterior postlabial formula with 4 (G1–4), 2 (H2–3), 3 (J1–3) plus 3 chaetae below ‘J’ series, basal chaeta (b.c.) larger (Fig. 19D).

Thoracic chaetotaxy (Figs 20 A–B). Th II, series ‘a’, ‘m’ and ‘p’ with 8, 11 and 17–18 chaetae, respectively (m 1i and p 1i 2 absent). Th III, series ‘a’, ‘m’ and ‘p’ with 8, 5 and 8 chaetae, respectively. Th II: III ratio as 1.43: 1.

Abdominal chaetotaxy (Figs 20 C–E, 21 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 3–4 accessory chaetae, respectively. Abd III, series ‘a’, ‘m’ and ‘p’ with 6, 6 and 5–6 chaetae, respectively; 4 accessory chaetae around bothriotrichum m2, and 10 between bothriotricha a5 and m5. Abd IV with 8–9 medial mac of series ‘A’ to ‘T’ (A3a–3, A5, B3–6, C1, T1), and 12–14 lateral mac of series ‘E’ to ‘Fe’ (E2–4p, Ee10, F1– 3, Fe2–5); postero-medial face with 4 sens and 4 posterior mes. Abd V, series ‘a’, ‘m’, ‘pa’, ‘p’ and ‘pp’ with 4, 6, 3, 7 and 3 chaetae, respectively. Abd III: IV ratio as 1: 4.33.

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 7 chaetae and 2 posterior psp (Figs 22 A–C). Trochanteral organ with 18 spine-like chaetae (Fig. 22D). Femur I of males with 6–8 thin spines (Fig. 22E). Tibiotarsus I with one row of 9 inner chaetae, 4 proximal spines finely ciliate (3 short and 1 larger) and 5 distal spine-like mac heavily ciliate and apically acuminate (Fig. 22E). Unguis with median tooth marginally larger than basal teeth, apical tooth smaller; ratio unguis:unguiculus = 1:0.50. Tibiotarsus III with “smooth” chaeta subequal to unguiculus; tenent hairs 1.08 larger than ungues outer face (as Fig. 12G). Collophore (Fig. 23A) with anterior face carrying 10 chaetae, 1 mac and 1 distal mes of unequal size, 4 longer and acuminate and 4 proximal spine-like chaetae; posterior face with 2 chaetae, 1 spine and 1 distal smooth chaeta; lateral flap with about 7 smooth and 7 ciliate chaetae. Furcula (Fig. 23 B–C). with ventral manubrium of formula 1, 0, 2, 0/ 2 (subapical) and 12 (apical) ciliate chaetae, apical inner chaeta smaller; dorsal manubrial plate with 4 ciliate chaetae and 3 psp.

Remarks. Tyrannoseira diabolica resembles T. sex in having reduced pigment and in general morphology. Differences between these species are given in Table 1.