Seira paramilloensis, Cipola & Godeiro, 2025

Seira paramilloensis sp. nov. Cipola & Godeiro

Figs 1 View FIGURE 1 , 6–11 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 , Table 1 View TABLE 1

Diagnosis. Anterior antennae orange, femur I–III distally with a dark navy-blue spot ( Fig. 6 View FIGURE 6 ); Ant IV not annulated with an apical bulb bilobed; Ant II–I respectively with 5 and 0 dorsal mac, respectively ( Fig. 7B View FIGURE 7 ); labral papillae conical, outer papillae smaller than the inner ones ( Fig. 7C View FIGURE 7 ); labial papilla E l.p. pointed (as in Fig. 3D View FIGURE 3 ); head macrochaetotaxy with 3 ‘A’, 2 ‘M’, 3 ‘S’, 3 ‘Pa’, 1 ‘Pm’, 2 ‘Pp’ and 0 ‘Pe’ mac, respectively ( Fig. 7E View FIGURE 7 ); postlabial region with 4 chaetae slightly smaller than the others, H1–2 chaetae absent ( Fig. 7F View FIGURE 7 ); Th II a (excluding the anterior collar), m and p series with 4, 6 and 10 posterior mac, respectively; Th III–Abd III with 4, 0, 4 and 1 inner mac, respectively; Abd III with 7 lateral mac; Abd IV with 10 inner and 32 lateral mac/mes, and 8 mes posteriorly ( Fig. 8 View FIGURE 8 ); trochanteral organ with about 63 spine-like chaetae ( Fig. 10D View FIGURE 10 ); unguis lateral teeth developed, a.t. present (as Fig. 5E View FIGURE 5 ); unguiculus acuminate with pe lamella serrated, lacking any stronger proximal teeth; collophore anteriorly with 8–10 proximal spines, 3 elongated mac and 2 normal distal mac, posteriorly with 3 smooth spines on each side plus 1 ciliate chaeta generally present ( Fig. 10E View FIGURE 10 ).

Description. Total length (head + trunk) of specimens 2.29–3.88 mm (n=4), holotype 2.55 mm. Specimens ground color pale white (in the majority of the body) to orange (antennal parts), with dark navy-blue pigments on distal Ant IV, proximal and distal Ant I, and femur I–III distally; eyepatches black ( Fig. 6 View FIGURE 6 ).

Head. Ratio antennae: trunk = 1: 1.47–1.70 (n=4), holotype 1: 1.55; antennal segments ratio as I: II: III: IV = 1: 1.47–1.56: 1.53–1.69: 1.98–2.10, holotype 1: 1.56: 1.69: 2.10. Ant III distally with 1 finger-shaped and 1 conical sens (apical organ), 3 guard sens and at least 15 sens of different sizes and shapes ( Fig. 7A View FIGURE 7 ). Ant II–I respectively with 5 and 0 dorsal mac ( Fig. 7B View FIGURE 7 ). Labral outer papillae smaller than inner papillae ( Fig. 7C View FIGURE 7 ). Clypeal formula with 4 (l1–2), 4–6 (f, 2 distally present or absent), 3 (pf0–1) ciliated chaetae, l1–2 strongly acuminate, 1 frontal smaller than the others, others subequal ( Fig. 7D View FIGURE 7 ). Maxillary palp b.c. slightly thicker and 1.14 longer than the t.a. Head dorsal chaetotaxy ( Fig. 7E View FIGURE 7 ) with 8–9 ‘An’ (An1a–1, An2–3), 3 ‘A’ (A0, A2–3), 2 ‘M’ (M1, M4), 3 ‘S’ (S3, S6–7), 3 ‘Pa’ (Pa1, Pa3, Pa5), 1 ‘Pm’ (Pm3), 2 ‘Pp’ (Pp1 –2) and 0 ‘Pe’ mac. Ventral chaetotaxy with 14 ciliated chaetae in the postlabial field, with 4 (G1–4), 2 (H3–H4) and 4 (J1–4) chaetae, 4 chaetae thinner and smaller than the others (G2–3, J2 and one unnamed), b.c. elongated, others subequal ( Fig. 7F View FIGURE 7 ).

Thorax chaetotaxy ( Fig 8A View FIGURE 8 ). Th II a, m and p series with 4 (a5–a5i2, excluding the anterior collar), 6 (m1, m2–2i, m4i–4p) and 10 (p1ip–p1p, p2, p2ea–2ep, p3–3p) mac, respectively. Th III a, m and p series with 0, 1 (m6) and 4 (p1, p2–2a, p3) mac, respectively. Ratio Th II: III = 1.79–1.44: 1 (n=4), holotype 1.53: 1.

Abdomen chaetotaxy ( Figs 8B–C View FIGURE 8 ). Abd I without mac, a, m and p series with 6 (a1–1e, a2–3, a5–6), 6 (m2, m3, m4–4i, m5–6) and 2 (p5–6) mic, respectively. Abd II a, m and p series with 1 (a2), 4 (m3–3ep, m5), 0 mac, respectively; a5 and m2 bothriotricha with 6 and 3 accessory chaetae, respectively. Abd III a, m and p series with 2 (a7–8?), 3 (m3, am6, pm6) and 3 (p6–6pe, p7) mac, respectively; m2 bothriotrichum with 5 accessory chaetae, bothriotricha a5 and m5 with 11 accessory chaetae between them. Abd IV with 10 inner mac on A–T series (A3, A5a–6, si, B3–6, sm) and about 13 mac and 19 mes laterally on D–Fe series (part of homologies and variations difficult to determine); 13 sens (ps type I, others type II) and 8 posterior mes. Abd V a, m, p and pp series with 2 (a5–6), 3 (m2–3, m5), 6 (p1, p3–6e) and 2 (pp5pi, pp6) mac, respectively. Ratio Abd III: IV = 1: 3.89–4.44 (n=4), holotype 1: 4.05.

Body psp pattern ( Figs 7A–B View FIGURE 7 , 8A–C View FIGURE 8 , 9 View FIGURE 9 , 10A–C, E, G View FIGURE 10 ). Dorsally: clypeus, on Ant I outer (1) and inner (1) sides, Th II–Abd IV dorsally (1), Abd IV posterior membrane (9), coxae I–III (2, 3–4, 2), manubrial basis (1), manubrial plate (3, 4 in one specimen on the more lateral part), and proximal dens (4–8); laterally: Th III–Abd III (0), BP4 (0); ventrally: Ant III (4–5), Ant II (1–3), Ant I (1–4), Th I–III (1), collophore anteriorly (1) and posteriorly (1), Abd. II, between collophore and tenaculum (2, 1 of them unpaired), tenaculum posteriorly (6–9, 1–3 of them unpaired), Abd IV (0) and anterior to genital plate (0).

Legs. Subcoxa I with one row of 5–6 chaetae; subcoxa II with an ‘a’ row of 13–15 chaetae, ‘p’ row of 6–7 chaetae; subcoxa III with one row of 12–13 chaetae ( Figs 10A–C View FIGURE 10 ). Trochanteral organ with about 63 spine-like chaetae ( Fig. 10D View FIGURE 10 ). Tibiotarsus I–III inner side with at least 9 mac. Unguis b.t. slightly more proximal than the ungual half, m.t. on distal one third and subequal to b.t., a.t. on distal one ninth and minute (as in Fig. 5E View FIGURE 5 ). Unguiculus with all lamellae acuminate and smooth (ai, ae, pi, pe), except pe serrate on its median region, lacking any remarkable stronger proximal tooth. Ratio of empodial complex III; unguis: unguiculus = 1: 0.57; tenent hair 1.07 larger than the unguis outer edge; tibiotarsal smooth chaeta 1.48 larger than the unguiculus.

Collophore ( Fig. 10E View FIGURE 10 ). Anterior side with 14–16 chaetae, 8–10 proximal smooth spine-like chaetae, 1 thin and smaller proximal chaeta, 2 median and 1 distal ciliated mac apically acuminate plus 2 distal mac; posterior side with 3 subapical spines, 1 weakly ciliated chaeta (present or absent), and 1 apical smooth chaeta; lateral flap with about 15–20 chaetae, 5–6 smooth (2 larger than the others) and 10–14 ciliate.

Furcula. Manubrium ventral chaetotaxy with 1, 2, 2, 2/4 (subapical), 18 (apical) ciliated chaetae, subapical chaetae unequal in size ( Fig. 10F View FIGURE 10 ). Manubrial plate with 3 psp and 6–11 ciliated chaetae, 2 inner and 2 outer larger, 2 smaller than the others, others subequal ( Fig. 10G View FIGURE 10 ).

Atypical variations. Within the type series, atypical features observed only on one side of one specimen were not considered here as a variation of the species, such as: basomedian labial field with 1 extra ciliate chaeta (M1e) and R chaeta ciliate, head Pp 5 chaeta as a mac and Abd IV sm chaeta as a mic.

Chaetotaxy of immature. In one juvenile, probably in the fourth instar, the following reductions in the dorsal macrochaetaxy (mac absent or as mic): 2 (An2p -2p2) on head, 6–8 (m2i, m4i, p1i, p1ip, p1p, p2ep, p2ea, p3p) on Th II (p1p and p2ep mac or mic), 1 (p2a) on Th III, and 1 (m3ep) on Abd II. The Abd IV of this immature have reduction of 5 inner mac (A3, A5a, A5, A6, B3) seen in the adults, which appear as mic, as well as at least 10 outer extra numerary chaetae, 16 of which (mac/mes) are of uncertain homology ( Fig. 8D View FIGURE 8 ). In the labial basomedian field, M2 chaeta is absent and the manubrial plate has only 2 chaetae and no psp in this immature.

Type Material. Holotype female on slide ( UNIANDES): Colombia, Antioquia Department, Jardín municipality, “Mesenia-Paramillo” Natural Reserve , 05°29’45”N, 75°53’21”W ( Fig. 11 View FIGURE 11 ), Andean mountain, 3.000 m., vii.2020, malaise trap, L Mazariegos coll. GoogleMaps 15 paratypes: 1 male, 5 females and 1 juvenile on slides (UNIANDES), 4 females ( INPA-CLL 0000409–412 ) 2 females on slides (CC/UFRN), and 2 females on slides (SNHM), same data of the holotype. GoogleMaps

Etymology. Refers to type locality where the new species was found, “Mesenia-Paramillo” Natural Reserve.

Remarks. Seira paramilloensis sp. nov. and Seira antonioi sp. nov. resemble 10 other species of the genus by their Abd I devoid of mac: S. andensis Jacquemart, 1980 (1980b), S. glabra Godeiro &Bellini, 2013 , S. lepidochaetosa Cipola & Bellini, 2018 ( 2018b), S. metafemurata Cipola & Bellini, 2018 , S. mirianae Arlé & Guimaraes, 1981 , S. paucisetosa Jacquemart, 1980 (1980a), S. pietata Oliveira, Ferreira & Zeppelini, 2020 , S. praiana Bellini, Fernandes & Zeppelini, 2010 , S. semicaerulea Cipola & Bellini, 2018 (2018) and S. yemenensis Barra, 2004 ( Table 1 View TABLE 1 ). However, our new species can be readily separated from these species by: Ant IV apical bulb bilobed (unilobed in S. glabra , S. praiana and eventually in S. mirianae ), prelabral chaetae ciliate (smooth in S. pietata ), unguis a.t. present (absent in S. mirianae ); unguiculus ai lamella acuminate (truncate in S. lepidochaetosa and S. semicaerulea , excavate in S. metafemurata ), and manubrial plate devoid of blunt mac (present in S. metafemurata ). On the head dorsal chaetotaxy, the new species differ from the others by the absence of M2 (present in S. pietata , S. praiana ) and S0 mac (present in S. andensis , S. mirianae , S. pietata , S. yemenensis ), and S7 mac present (absent in S. andensis , S. metafemurata , S. paucisetosa , S. yemenensis ) plus 6–9 postoccipital series mac (3 or less in S. lepidochaetosa , S. metafemurata , S. mirianae , S. paucisetosa , S. pietata and S. semicaerulea ). On Th II, both new species have 3–4 mac on m1–2 complex (less in S. glabra , S. metafemurata , S. paucisetosa , S. praiana and 6 in S. mirianae ), and they are devoid of p2p mac (present in S. andensis and S. mirianae ). Also, on Th III they have 4 inner mac (all other species with a different number of mac in this tergite, except S. yemenensis ), Abd IV with 8–10 inner mac (7 or less in S. glabra , S. metafemurata , S. paucisetosa , S. yemenensis ), plus numerous extra mac and mes laterally (absent in the previously described species). Without a doubt, the high number of mac and mes laterally in the Abd IV is atypical in the genus, very likely unique since it was not reported before to other Seira taxa, and it may suggest a closer relationship between the two new species.

Even so, S. antonioi sp. nov. differs from S. paramilloensis sp. nov. by: Ant I with 1 dorsal mac (absent in S. paramilloensis sp. nov.), 4 mac present on the head (A5, Pa2, Pp3 and Pe3) and 1 absent (S6), while in S. paramilloensis sp. nov. is the opposite. On Th II, S. antonioi sp. nov. differs by 6 anterior (4 in S. paramilloensis sp. nov.), and 4 posterior mac (p1i2, p2a and p5 mac present, p3p absent) (the opposite in S. paramilloensis sp. nov.). Still regarding the dorsal chaetotaxy, S. antonioi sp. nov. has 3 inner mac on Abd II (4 in S. paramilloensis sp. nov.), Abd III with 8 lateral mac (7 in S. paramilloensis sp. nov.), Abd IV with 8 inner mac and about 43 lateral mac/mes (10 inner and 32 lateral in S. paramilloensis sp. nov.), plus 6 mes posteriorly (8 in S. paramilloensis sp. nov.). Further differences between the new species and other Seira species without mac on Abd I are detailed in Table 1 View TABLE 1 .