Salina zhangi,

Bellini, Bruno Cavalcante & Cipola, Nikolas Gioia, 2017, The Neotropical genera of Paronellinae (Collembola, Entomobryoidea, Paronellidae) with description of two new species and redescription of Campylothorax mitrai, Zootaxa 4300 (2), pp. 151-179: 154-155

publication ID

https://doi.org/10.11646/zootaxa.4300.2.1

publication LSID

lsid:zoobank.org:pub:92ECE1FD-6C96-492E-AB44-62AB9D02FEA6

persistent identifier

http://treatment.plazi.org/id/6F205733-3428-3A06-CC8A-FD3F44F3FC5B

treatment provided by

Plazi

scientific name

Salina zhangi
status

sp. nov.

Salina zhangi  sp. nov. Bellini & Cipola

Figs 5, 7–29View FIGURES 6 – 11View FIGURES 12 – 14View FIGURES 15 – 19View FIGURES 20 – 21View FIGURES 22 – 29

Type material. Holotype female on slide, Brazil, Bahia State, Mucugê municipality, Rio Cumbuco (13°01’03”S; 41°22’11”W), Caatinga Biome, 13.xi.2015, B.C. Bellini coll. Paratypes four females and one male on slides, plus 5 specimens in alcohol, same data as holotype. Type material deposited at Collembola  Collection of DBEZ / UFRN.GoogleMaps 

Description. Total length (head + trunk) of holotype 1.57 mm. Habitus typical of Salina  ( Fig. 5). Specimens pale white to light yellow with blue to brown pigment covering the Ant. IV –II, lateral head, lateral edges of Th. II – III, medial Abd. III and posterior IV, and entirely the tibiotarsi. Eyepatches, distal margin of Ant. I –III and anterior margin of head dark ( Fig. 5). Dorsal head and trunk covered by several ciliate mic and mes.

Head ( Figs 5, 7–14View FIGURES 6 – 11View FIGURES 12 – 14). Antennae longer than body, antennal ratio as I: II: III: IV = 1: 1.54–1.56: 1.19–1.92: 1.86– 2.28 ( Fig. 5). Ant. IV not subdivided, weakly annulated, with single apical bulb and at least three types of chaetae: blunt sensilla, smooth acuminate chaetae and ciliate chaetae ( Fig. 7View FIGURES 6 – 11). Ant. III sense organ with two clubbed sensilla, three surrounding guard sensilla, plus some blunt sensilla, ciliate and smooth chaetae ( Fig. 8View FIGURES 6 – 11). Four prelabral ciliate chaetae ( Fig. 9View FIGURES 6 – 11). Labral formula 5 (p0–2), 5 (m0–2), 4 (a1–2), all chaetae smooth, a1 thick and apically rounded, posterior row chaetae larger than others ( Fig. 9View FIGURES 6 – 11). Clypeal central chaetae formula 2(I1), 4(f1–2), 3(pf0-1), all ciliate, f1 larger than others ( Fig. 10View FIGURES 6 – 11). Eyes 8+8, G and H slightly smaller, A-F subequal, with 3 interocular chaetae ( Fig. 11View FIGURES 6 – 11). Dorsal chaetotaxy with 6 antennal (An), 2–1 medio-ocellar (M), 3 sutural (S), 3 postsutural (Ps), 3 postoccipital anterior (Pa), 2 postoccipital medial (Pm), and 1 postoccipital posterior (Pp) chaetae; anterior chaetae (A) absent; Pe3 mac present; antero-ocular bothiothrichum absent, post-ocular (Pa6) present ( Fig. 11View FIGURES 6 – 11). Labial basolateral and basomedian fields with M, E, L1–2 ciliate, A1–5 smooth; M1 smooth in one specimen, A5 parallel sided, r absent ( Fig. 12View FIGURES 12 – 14). Labium with five smooth proximal chaetae; labial palp with five main papillae (A –E), and with 0, 5, 0, 4, 2 guard chaetae, respectively; papilla E with lateral process (l.p.) finger-shaped; H (main hypostomal chaeta) with two accessory hypostomal chaetae ( Fig. 12View FIGURES 12 – 14). Maxillary outer lobe with one apical appendage, one subapical chaeta and three sublobal appendages, only the subapical chaeta discretely ciliate, others smooth; subapical chaeta and apical appendage subequal ( Fig. 13View FIGURES 12 – 14). Ventral chaetotaxy as in Fig. 14View FIGURES 12 – 14, all chaetae ciliate, long; cephalic groove with 8+8 marginal chaetae, two smaller and smooth; three ventral chaetae present or absent (marked by arrows) ( Fig. 14View FIGURES 12 – 14).

Thorax chaetotaxy ( Figs 15–16View FIGURES 15 – 19). Pseudopores unclear on all segments. Th. II with 1 S-microchaeta (ms), 1 anterolateral sens (al); 1–0 anterior (a5) excluding the anterior collar, 2–1 medial (m1, m7), and 5 posterior mac (p1, p3–6?) ( Fig. 15View FIGURES 15 – 19). Th. III with 1 anterolateral sens (al), and 9–6 posterior mac (p1–3p, p5–6) ( Fig. 16View FIGURES 15 – 19).

Abdomen chaetotaxy ( Figs 17–21View FIGURES 15 – 19View FIGURES 20 – 21). Pseudopores unclear in all segments. Abd. I with 1 S-microchaeta (ms); 1 anterior (a2), 3–2 medial (m3–5), and 1 posterior (p6) mac ( Fig. 17View FIGURES 15 – 19). Abd. II without sens, bothriotricha m2 and a5 present plus 3 mac (m3–3e, m5) ( Fig. 18View FIGURES 15 – 19). Abd. III with 1 S-microchaeta (ms), 1 anterosubmedial sens (as), bothriotricha m2, m5 and a5 present plus 6–3 lateral mac (p6–m6, am6, m7?, p7?–i?) ( Fig. 19View FIGURES 15 – 19). Abd. IV 1 posterior sens (ps) plus about 11 other sens; primary bothriotricha T2 and T4 plus secondary B6 and bothriotricha like chaetae Fe4–5 present; row ‘A’ with 2 (A1, A6), ‘Ae’ with 1 (Ae1), ‘Be’ with 1 (Be1), ‘B’ with 3 (B3–5), ‘C’ with 1 (C1), ‘E’ with 3 (E1–3), ‘F’ with 4 (F1–3p), and ‘Fe’ with 2 (Fe1–2) mac; 4+4 posterior chaetae ( Fig. 20View FIGURES 20 – 21). Abd. V with 1 anterosubmedial sens (as) and 2 accessory sens (acc.p4–p5), 3 anterior (a0, a3, a5), 4 medial (m2– 3, m5–5a), and 4 posterior (p1, p3–4, ap6) mac ( Fig. 21View FIGURES 20 – 21).

Legs ( Figs 22–23View FIGURES 22 – 29). Trochanteral organ with approximately 17 small smooth chaetae ( Fig. 22View FIGURES 22 – 29). Ungues with four inner teeth, one pair basal, one unpaired median, and one minute unpaired distal plus a pair of small outer lateral teeth. Unguiculi excavated, all lamellae smooth. Tenent hairs ciliate, longer than unguis. Pretarsal chaeta (posterior) present ( Fig. 23View FIGURES 22 – 29). Tibiotarsus III with a smooth inner distal chaeta, opposite to the tenent hair ( Fig. 23View FIGURES 22 – 29).

Collophore ( Figs 24–26View FIGURES 22 – 29). Anterior side with 2 large ciliate chaetae plus 8–7 surrounding smooth smaller chaetae ( Fig. 24View FIGURES 22 – 29); lateral flap with about 14 smooth chaetae ( Fig. 25View FIGURES 22 – 29); posterior side with 2+2 large distal chaetae plus 4–6 surrounding smaller chaetae, all very weakly ciliate ( Fig. 26View FIGURES 22 – 29).

Retinaculum and Furcula ( Figs 27–29View FIGURES 22 – 29). Retinaculum rami with four teeth; corpus with one weakly ciliate chaeta ( Fig. 27View FIGURES 22 – 29). Manubrial plate with two ciliate chaetae plus 1 pseudopore ( Fig. 28View FIGURES 22 – 29). Dens smooth with one typical dorso-distal scale-like projection. Mucro square with four teeth, three apical and one medio-internal ( Fig. 29View FIGURES 22 – 29).

Etymology. The new species was named after Dr. Feng Zhang, an important Collembola  researcher from China.

Distribution and habitat. The new species was found in the Caatinga phytogeographic domain, Northeast Region of Brazil, Good’s biogeographic zone 27 of Neotropical Region ( Good 1974). The climate of the area following the Köppen-Geiger system is "Aw" equatorial winter dry (Semi-arid climate), characterized by overall low humidity and little rainfall volume, with averages lower than 60 mm in winter ( Kottek et al. 2006). Specimens of S. zhangi  sp. nov. were collected in the humid sandy bed of Cumbuco River.

Remarks. The new species fits the celebensis  -group proposed by Yoshii (1983) due to the presence of square mucro, reduced macrochaetotaxy and two central and one lateral (near a5 bothriotrichum) mac on Abd. II. Salina zhangi  sp. nov. also fits a particular group of Neotropical species with short mucrones with four teeth, as stated by Mari Mutt (1987a), which are: S. panamae Jacquemart, 1982  , S. dedoris Mari Mutt, 1987  (in Mari Mutt 1987b), S. hermana Mari Mutt, 1987  (in Mari Mutt 1987b) and S. tristani Denis, 1931  ( Mari Mutt 1987a). The overall white to yellowish color pattern and dorsal chaetotaxy of S. zhangi  sp. nov. resembles mostly S. hermana  and S. tristani  , but the new species is differs in dorsal chaetotaxy: Th. II posterior region presents 4–3 internal mac while the other species present 7–5; Th. III of S. zhangi  sp. nov. does not have p4 while in the other species is present; Abd. I of the new species has p6? mac which is absent (or omitted) on the other two species; Abd. III of the new species also had one extra lateral mac (m7?) when compared to S. hermana  (information lacking to S. tristani  ). Finally, S. zhangi  sp. nov. presents the subapical chaeta of maxillary outer lobe weakly ciliate (smooth in S. hermana  ) and 17 chaetae on trochanteral organ (12 in S. hermana  ).

UFRN

Universidade Federal do Rio Grande do Norte