Cyphoderus bihariensis Roy, Mandal & Suman, 2025

Cyphoderus bihariensis Roy, Mandal & Suman sp. nov. ( Figs 1–4 View Figure 1 View Figure 2 View Figure 3 View Figure 4 , Table 1)

https://zoobank.org/ urn:lsid:zoobank.org:act:

Type material. Holotype ♀ on slide, INDIA, Bihar, Gaya, D.F.O. Office, 24°47'39" N, 84°59'26" E, 135 m. a.s.l., 07.iii.2022, K.K. Suman leg., Reg. no– 3640/H14 GoogleMaps . Paratypes: 1♀, 1♂ on slide, 23 specimens in alcohol, same data as holotype. Reg. no– 3641/H14 GoogleMaps .

Etymology. The specific name is after the collection state.

Description. Female holotype ( Fig. 1 View Figure 1 ). Body length approx. 1.97 mm (head to Abd. VI).

Colouration. Pale yellow-white ground colour without pigmentation ( Fig. 1 View Figure 1 ).

Head. Eyes absent. Ratio of Ant. I: II: III: IV = 1: 2.26: 1.19: 3 ( holotype). Antenna not annulated, apical bulb absent on Ant. IV. Apical organ presents on Ant. III. Clypeal chaetae smooth and acuminate, formula with 3 (pf0–1), 2(ft), 4(l1–2) ( Fig. 2A View Figure 2 ). Prelabral and labral formula 4/5,5,4 with smooth chaetae ( Fig. 2B View Figure 2 ). Labial triangle: all chaetae ciliated, E chaetae normal; formula A2–3, M1–2, E, L1 ( Fig. 2C View Figure 2 ). Ciliated chaetae present along ventral groove. Asymmetric mandible with five teeth on left and four teeth on right. Labial palp with five papillae. Cephalic chaetotaxy as in Figure 2D View Figure 2 : five mac in f series (f1–5); four mic in A series (A0, A2–3, A5); mic M1–5, S0’, S2–5, Ps1 present in medio-ocellar to postsutural areas; posterior chaetae Pa3, Pa5, Pa6 (Bt.), Pm3, Pp1, Pp5 present.

Body. Ratio of Th. II: III = 1: 1.06 ( holotype). Trochanteral organ with 21 chaetae forming ‘V’ shape ( Fig. 2E View Figure 2 ). Tibiotarsus with smooth clavate tenent hair. Unguis with paired unequal basal teeth (b.a. and b.p.) and a strong unpaired distal tooth (m.t.). Lanceolate acuminate unguiculus with two lamellae (a.i., a.e., p.i. and p.e.), a tooth on outer lamellae (p.e.) with length equal to the outer lamella ( Fig. 3A View Figure 3 ). Ratio of Abd. I: II: III: IV: V: VI = 1.58: 1.24: 1.58: 7.16: 1.13: 1 ( holotype). Ventral tube with 2+2 anterior ciliated mac; six ciliated apical mes on each side; 1+1 mac (only socket) on posterior surface ( Fig. 2F View Figure 2 ). Ratio of Manubrium: dens: mucro = 3.8: 2.62: 1 ( holotype).

Dorsal dens feathered scales formula as: ten De (De1–10), eleven Di (Di1–11), eight m (m1–8) ciliated chaetae, three proximal dens chaetae (pde, pdm, pdi), pde smooth and acuminate, pdm socket present, pdi ciliated and acuminate ( Fig. 3B View Figure 3 ). Mucro with eight teeth, one apical tooth, three well-developed teeth, four reduced or vestigial teeth, one lateral ledge, M.f.: aAA4A ( Fig. 3C View Figure 3 ). Body chaetotaxy as in Figs 3D View Figure 3 , 4A–C View Figure 4 : Th–II with a2, a5, m1–2, m4–6 and p1i, p1–6 as mic. Th–III with a2, m1–2, m4–6 and p1, p3–5 as mic. Abd–I with m1–3 as mic. Abd–II with a5(Bt.), a6–7, m1, m2 (Bt.), m3, m5–6, p6–7 as mic. Abd–III with a5 (Bt.), a6–7, m2 (Bt.), m5 (Bt.), m7, p1–7 as mic. Abd–IV with T2 (Bt.), T4 (Bt.), E4 (Bt.), A3 (mac), B3(mac), B4 (mic), B5 –6 (mac), C3 (mic), C4 (mac), T1 (mic), T5–7 (mic), E1 & E3 (mac), E4p–p2 (mac) present; three psp and two mic present on the posterior edge of the Abd–IV. Medial psp from Th. II to Abd. IV as 1,1/1,1,1,1.