Entomobrya albitrigona, Viana & Morais & Cipola, 2024
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publication ID |
https://doi.org/ 10.11646/zootaxa.5452.1.1 |
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publication LSID |
lsid:zoobank.org:pub:093738EB-2BEE-4DFA-B930-FAC1FBF08FA4 |
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DOI |
https://doi.org/10.5281/zenodo.11232731 |
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persistent identifier |
https://treatment.plazi.org/id/062587E9-C76A-FE7E-FF7C-C2D5FAA921F7 |
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treatment provided by |
Plazi |
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scientific name |
Entomobrya albitrigona |
| status |
sp. nov. |
Entomobrya albitrigona sp. nov. Viana & Cipola
Figs 42–47 View FIGURE 42 View FIGURE 43 View FIGURE 44 View FIGURE 45 View FIGURE 46 View FIGURE 47 , 72 View FIGURE 72 , Table 2
Type Material. Holotype female on slide ( INPA-CLL 0000240 ): Brazil, Amazonas state, Maués municipality, forest of “Santa Helena” farm, next to “Morais” road, 03°27’13”S, 57°39’01”W ( Fig. 72 View FIGURE 72 ), 23 m, 28.iv.2017 – 09.v.2017, malaise-trap, A Somavilla coll. Twenty paratypes: 2 males and 6 females on slides and 4 specimens in alcohol ( INPA-CLL 0000241–49 ), 1 male and 1 female on slides ( CC / UFRN), 1 male and 1 female on slides ( MNRJ), and 1 juvenile on slide ( MZUSP), same date as holotype; 3 specimens in alcohol ( INPA-CLL 0000250 ), same date as holotype, except 25–28.iv.2017. GoogleMaps
Other examined material. One female on slide ( INPA): Brazil, Amazonas state, Manaus municipality, forest of the INPA, “Bosque da Ciência”, 03°05’54”S, 59°59’09”W ( Fig. 72 View FIGURE 72 ), 94 m, 20.vii.2010, entomological umbrellacollect, FGL Oliveira coll. GoogleMaps
Diagnosis. Body blackish to bluish, Th II to Abd IV dorsally with one depigmented central triangle-shaped region ( Figs 42A–B View FIGURE 42 ), Ant IV without the apical bulb ( Fig. 43A View FIGURE 43 ); pl1 chaeta smooth and bifurcated ( Fig. 43C View FIGURE 43 ); head macrochaetotaxy with 6–7 ‘ An ’, 3 ‘ A ’, 2–3 ‘ M ’, 7–9 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 2 ‘ Pi ’, 1–2 ‘ Pm ’, 1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively ( Fig. 43D View FIGURE 43 ); labral papillae with 1 projection ( Fig. 44A View FIGURE 44 ); labial papilla E l.p. conical and reaching the base of a.a. ( Fig. 44B View FIGURE 44 ); sublobal plate with 3 inner appendages ( Fig. 44C View FIGURE 44 ); Th II internally with 3–7 anterior, 4–6 median and 12–19 posterior mac; Th III–Abd I with 16–21 and 6–8 mac, respectively; Abd II–III with 3–4 and 0 inner mac, respectively; Abd IV with 15–20 inner and 10–13 outer mac ( Figs 45A–C View FIGURE 45 ); unguiculus I–II ai lamella slightly truncate distally and pe serrated, unguiculus III ai slightly truncate, all lamellae acuminate ( Fig. 46E View FIGURE 46 ); collophore anteriorly with 3 distal mac ( Fig. 47A View FIGURE 47 ); dens distally only with regular chaetae ( Fig. 47D View FIGURE 47 ); mucro proximal tooth larger than the distal one, basal spine surpassing the apex of the proximal tooth ( Fig. 47D View FIGURE 47 ).
Description. Total length (head + trunk) of specimens 1.68–2.55 mm (n=4), holotype 2.55 mm. Specimens pale white to yellowish with dark blue pigments on Ant IV distally and proximal Ant I, body all pigmented, except for small irregular spots depigmented on head and trunk, including one central triangle-shaped region dorsally on Th II to Abd IV; Abd V–VI depigmented; collophore, coxa I–III and trochanter I–III depigmented; femur I–III pigmented or not; manubrium strongly or weakly pigmented on its proximal region; eyepatches black ( Figs 42A–B View FIGURE 42 ).
Head.Antenna subequal or slightly shorter than the trunk length ( Fig. 42A View FIGURE 42 ), ratio antennae: trunk = 0.97–0.84: 1 (n=4), holotype 0.97: 1; antennal ratio as I: II: III: IV = 1: 1.32–1.53: 1.22–1.59: 1.69–2.40 (n=4), holotype 1: 1.32: 1.22: 1.69. Ant IV weakly annulated on its distal 2/3 and devoid of apical bulb, with 3 apical finger-shaped sens, and numerous sens of different sizes ( Fig. 43A View FIGURE 43 ). Ant III organ with 2 club-shaped sens, 3 guard sens, 2 elongated sens and at least 6 sens of different sizes. Ant II dorsally with about 9 elongated sens, 4 dorsal and 4 ventral mac ( Fig. 43B View FIGURE 43 ). Ant I dorsally with 4 elongated sens, 2–3 mac and 3 smooth mic at the base ( Fig. 43B View FIGURE 43 ). Eyes A and B larger, G and H slightly smaller than the others, with 6 interocular mes (q, v, s, p, r, t); head dorsal chaetotaxy ( Fig. 43D View FIGURE 43 ) with 6–7 ‘ An ’, 3 ‘ A ’, 2–3 ‘ M ’, 7–9 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 2 ‘ Pi ’, 1–2 ‘ Pm ’, 1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively. Clypeal formula with 4 (l1–2), 6–8 (f), 3 (pf0 –1) ciliate chaetae, l1–2 longer and ciliate, apically acuminate, 2–4 f subtly larger than the others, others subequal ( Fig. 43C View FIGURE 43 ). Prelabral chaetae smooth, pl1 bifurcated equally, pl2 normal or bifurcated equally or unequally ( Fig. 43C View FIGURE 43 ). Labral papillae with 1 projection, inner papillae subtly larger than the outer papillae ( Fig. 44A View FIGURE 44 ). Labial papilla E l.p. conical and reaching the base of a.a. ( Fig. 44B View FIGURE 44 ). Maxillary palp b.c. 1.32 longer than t.a.; sublobal plate with 3 inner appendages (bs1–3) ( Fig. 44C View FIGURE 44 ). Basolateral and basomedian labial fields with M1–2, R, E, L1–2 ciliate, M2 subtly smaller than the others, present or absent ( Fig. 44D View FIGURE 44 ). Cephalic groove with 9 ciliate chaetae of different sizes; postlabial formula with 4 (G1–4), 4 (X2–4), 4 (H1–4) chaetae plus 1 chaeta between the series ( Fig. 44E View FIGURE 44 ).
Thorax chaetotaxy ( Fig. 45A View FIGURE 45 ). Th II a, m and p series (excluding the anterior collar) with 3–7, 4–6 and 12–19 mac, respectively. Th III a, m and p series with 6–7, 2–3 and 8–11 mac, respectively. Ratio Th II: III = 1.83–1.42: 1 (n=4), holotype 1.83: 1.
Abdomen chaetotaxy ( Figs 45B–C View FIGURE 45 ). Abd I a and m series with 0–1 and 5–7 mac, respectively. Abd II a, m and p series with 0–1, 5 and 0–2 mac, respectively. Abd III a, m and p series with 1, 2 and 1 mac, respectively. Abd IV with 15–20 inner mac of A–C series and 10–13 outer mac of T – Fe; about 9 sens (ps type I and others type II) and 19 posterior mes. Abd V a, m, pa and p series with 2–3, 3, 1 and 5 mac, respectively. Ratio Abd III: IV = 1: 6.47–7.68 (n=4), holotype 1: 7.38.
Legs ( Figs 46A–E View FIGURE 46 ). Subcoxa I with 3 chaetae and 2 psp; subcoxa II with an anterior row of 6–7 chaetae and about 5 anterior chaetae; posterior row of 3–4 chaetae and 2 psp; subcoxa III with one row of 6–9 chaetae, about 12 anterior chaetae and 2 psp ( Figs 46A–C View FIGURE 46 ). Trochanteral organ with 17–39 spine-like chaetae ( Fig. 46D View FIGURE 46 ). Tibiotarsus I–III with 7–8 inner finely ciliate mac. Unguis b.t. on proximal 1/3, m.t. on distal 1/3 and smaller than b.t., a.t. minute and on distal 1/7. Unguiculus I–III lamellae (ae, ai, pe, pi) smooth and acuminate, except I–II ai slightly truncate. Ratio unguis: unguiculus = 1: 0.48. Tibiotarsus III smooth chaeta 1.21 longer than the unguiculus; tenent hair 0.69 smaller than the unguis ( Fig. 46E View FIGURE 46 ).
Collophore ( Fig. 47A View FIGURE 47 ). Anterior side with about 21 ciliate chaetae, 3 distal mac and about 18 chaetae of different sizes widely distributed on the corpus; posterior side with about 38 ciliate chaetae of different sizes widely distributed on the corpus (5 unpaired), distally with 1 smooth chaeta; lateral flap with 17 chaetae, 7 smooth and 10 ciliate.
Furcula ( Figs 47B–D View FIGURE 47 ). Manubrium ventrally with 2 subapical and about 24 distal ciliate chaetae of different sizes. Manubrial plate dorsally with 7–10 chaetae of different sizes and 3 psp. Dens dental lobe with 2 (bs1 and bs2) thicker ciliate chaetae, bs1 subequal to bs2. Dens tightly crenulate on its distal 1/4 distally only with regular chaetae. Mucro proximal tooth larger than the distal one, mucronal spine surpassing the proximal tooth apex ( Fig. 47D View FIGURE 47 ).
Distribution. Known only from Amazonas state, Brazil ( Fig. 72 View FIGURE 72 ).
Etymology. Refers to the triangular-shaped dorsal depigmented region on Th II to Abd IV ( Fig. 42B View FIGURE 42 ) in the new species (from Latin: albi —white color, depigmented; and from Greek: trigon —triangular).
Remarks. Entomobrya albitrigona sp. nov. resembles E. acreanensis sp. nov. (see the remarks of E. acreanensis sp. nov. and Table 2) and Entomobrya nigritella Yosii & Ashraf, 1965 from Pakistan by the presence of a depigment triangle-shaped region on the body and labral papillae with 1 projection (see Yosii & Ashraf 1965: 167). However, E. albitrigona sp. nov. differs from these species by unguiculus III ai lamella slightly truncate and pe smooth ( Fig. 46E View FIGURE 46 ) (ai acuminate and pe serrated in E. nigritella and E. acreanensis sp. nov.). Additionally, E. albitrigona sp. nov. also differs from E. nigritella by Ant IV apical bulb absent ( Fig. 43A View FIGURE 43 ) (bilobed in E. nigritella ), collophore anteriorly with 3 distal mac ( Fig. 47A View FIGURE 47 ) (4 mac in E. nigritella ), mucro proximal tooth larger than the distal one (subequal in E. nigritella ), and mucronal spine surpassing the proximal tooth apex (not reaching in E. nigritella ) ( Fig. 47D View FIGURE 47 ).
| CC |
CSIRO Canberra Rhizobium Collection |
| UFRN |
Universidade Federal do Rio Grande do Norte |
| MNRJ |
Museu Nacional/Universidade Federal de Rio de Janeiro |
| MZUSP |
Museu de Zoologia da Universidade de Sao Paulo |
| INPA |
Instituto Nacional de Pesquisas da Amazonia |
| T |
Tavera, Department of Geology and Geophysics |
| V |
Royal British Columbia Museum - Herbarium |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.