Entomobrya bahiana Bellini & Cipola

Bellini, Bruno C., Cipola, Nikolas G. & Godeiro, Nerivânia N., 2015, New species of Lepidocyrtus Bourlet and Entomobrya Rondani (Collembola: Entomobryoidea: Entomobryidae) from Brazil, Zootaxa 4027 (2), pp. 227-242: 234-240

publication ID

http://dx.doi.org/10.11646/zootaxa.4027.2.3

publication LSID

lsid:zoobank.org:pub:D340D1CA-CFE6-487E-8140-293E80E5BE2A

persistent identifier

http://treatment.plazi.org/id/637787F3-517E-FF84-FF5F-FE19FD0DDD6D

treatment provided by

Plazi

scientific name

Entomobrya bahiana Bellini & Cipola
status

sp. nov.

Entomobrya bahiana Bellini & Cipola  sp. nov.

Figs 22–39, Table 2

Type material. Holotype male on slide, Brazil, Bahia State, Chapada Diamantina National Park, Abaira municipality, Catolés de Cima village, Pico do Barbado (13 ° 17 ' 40 "S; 41 ° 54 ' 30 "W), Caatinga Domain, 28.iii. 2008. Bellini, B.C. & A.S. Ferreira coll. Paratypes 1 male and 1 female on slides, plus one adult on 70 % ethanol, same data as Holotype. Type material deposited at Collembola  Collection of DBEZ / UFRN.

Description. Total length (head + trunk) of holotype 1.32 mm. Habitus typical entomobryoid ( Fig. 22). Specimens in alcohol with dark blue pigment covering almost all body, with exception of head, most of Th. II, anterior Abd. IV, all tibiotarsi and distal furcula ( Fig. 22). Body and appendages without scales.

Head. Antennae shorter than body ( Fig. 22). Ant. IV not annulated or subdivided, with a single apically rounded apical bulb, with ciliate normal chaetae, two types of smooth chaetae (small and normal) and some blunt schaetae ( Fig. 23View FIGURES 23 – 31). Ant. III sense organ as in Fig. 24View FIGURES 23 – 31, with 2 rods and 3 surrounding guard sensilla; different types of apical chaetae in Ant. III as in Fig. 24View FIGURES 23 – 31. Eyes 8 + 8, lenses A to F well developed, lenses G and H smaller; eyepatch valley with 4 chaetae (s, q, t as ciliate mesochaetae; p as macrochaeta) ( Fig. 25View FIGURES 23 – 31). Dorsal chaetotaxy as in Fig. 32View FIGURE 32, with 5 pre-antennal macrochaetae (An series); 4 anterior macrochaetae (A0, A 2, A 3 and A 5); 3 or 4 medio-ocellar macrochaetae (M 2-4 always present, M 1 present or absent); 6 sutural macrochaetae (S0, S 1, S 4, S 4 i, S 5 and S 5 i); 3 post-sutural macrochaetae (Ps 2, Ps 3 and Ps 5); 2 post-occipital internal macrochaetae (Pi 1 and Pi 2); 5 postoccipital anterior chaetae (Pa 1, Pa 3 ’, Pa 3 and Pa 5 as macrochaetae; Pa 6 as post-ocular bothriotrichum); 4 postoccipital medial macrochaetae (Pm 1, Pm 3, Pm 5 and Pm 6); 3 post-occipital posterior macrochaetae (Pp 1–3); Pp 1 e and Pe 3 macrochaetae present, posterior to Pp series. Prelabral and labral chaetae smooth and simple (not bifurcate). Labral papillae as in Fig. 26View FIGURES 23 – 31, without spine-like lateral structures. Labial region as in Fig. 27View FIGURES 23 – 31. Maxillary palp with apical and basal appendages smooth, subequal in size; sublobal plate with 3 smooth appendages. Labial palp papilla E with 4 appendages, lateral process apex acuminate. Five proximal chaetae of labial palp smooth; Labial triangle chaetae: M, R, E, L 1 and L 2 ciliate; R not reduced, but smaller than M and E; A 1–5 smooth. All post labial chaetae ciliate.

Thorax. Mesothorax normal, not strongly projecting forward or in a hood shape. Chaetotaxy of Th. II as in Fig. 33View FIGURES 33 – 36, with 1 anterior macrochaeta (a 5), excluding anterior chaetal collar; 5 medial macrochaetae (m 1, m 2, m 2 i 2, m 4 i, m 4); and 13 posterior macrochaetae (p 1, p 1 p, p 1 a, p 2, p 2 a, p 2 e, p 3, p 4, p 4 i, p 5, p 5 pi, p 6, p 6 e); one accessory sensillum near p 6 e. Chaetotaxy of Th. III as in Fig. 34View FIGURES 33 – 36, with 9 anterior macrochaetae (a 1–6 and a 6 i); 5 medial macrochaetae (m 5, m 5 i, m 6, m 6 e and m 7); and 14 posterior macrochaetae (p 1–6, p 1 i 2, p 1 i, p 1 a, p 2 i, p 2 a, p 4 i, p 4 p and p 5 pi); one accessory sensillum near m 6 and other near m 7.

Abdomen. Abd. IV more than twice the length (in the midline) of Abd. III ( Fig. 22). Chaetotaxy of Abd. I as in Fig. 35View FIGURES 33 – 36, with 1 anterior macrochaeta (a 2); and 7 medial macrochaetae (m 2–6, m 4 ip and m 6 e) plus two unnamed chaetae (?); one microsensillum and one sensillum near m 5. Chaetotaxy of Abd. II as in Fig. 36View FIGURES 33 – 36, with 4 anterior chaetae (a 2, a 6 and a 6 e? as macrochaetae; a 5 as bothriotrichum); 5 medial chaetae (m 2 as bothriotrichum; m 3, m 3 ea, m 5 and m 6 as macrochaetae) plus 1 unnamed macrochaeta; and 2 posterior macrochaetae (p 5 and p 6); el macrochaeta present. Chaetotaxy of Abd. III as in Fig. 37View FIGURES 37 – 39, with 4 anterior chaetae (a 1, a 6 and a 7? as macrochaetae; a 5 as bothriotrichum), plus am 6 macrochaeta; 3 medial chaetae (m 2 and m 5 as bothriotricha; m 3 as macrochaeta), plus pm 6 macrochaeta; and 2 posterior macrochaetae (p 6 and p 7); el macrochaeta present; one accessory sensillum near m 2. Chaetotaxy of Abd. IV as in Fig. 38View FIGURES 37 – 39, with 2 macrochaetae in Ai series (Ai 1 and Ai 2); 5 macrochaetae in A series (A 3–6 and A 3 p); 3 macrochaetae in Ae series (Ae 5, Ae 5 p and Ae 7); 6 macrochaetae in B series (B 1–6), plus Be 3 macrochaeta; 3 macrochaetae in C series (C 1, C 2 a and C 3); 6 chaetae in T series (T 1, T 5–7 as macrochaetae; T 2 and T 4 as bothriotricha); 4 macrochaetae in D series (D 1–3 and D 2 a?); 3 macrochaetae in E series (E 1–3); 4 macrochaetae in F series (F 1–3 and F 1 a?); and 4 macrochaetae of uncertain homology (?); five long sensilla present near A series. Chaetotaxy of Abd. V as in Fig. 39View FIGURES 37 – 39, with 2 anterior macrochaetae (a 1 and a 5); 3 medial macrochaetae (m 2, m 3 and m 5); and 5 posterior macrochaetae (p 1, p 3, p 4, p 5 and pap 6).

Legs, Ventral Tube and Furcula. Trochanteral organ well developed, with approximately 15 small spine-like chaetae ( Fig. 28View FIGURES 23 – 31). Hind empodial complex as in Fig. 29View FIGURES 23 – 31, tenent-hair smooth and spatulate, similar in length to unguis; unguis with 4 inner teeth, basal pair larger than the unpaired teeth; external teeth inserted apically in the outer edge of unguis; unguiculus acuminate, with smooth margins. Smooth posterior-distal chaeta on hind tibiotarsus present. Ventral tube with 9 + 9 anterior ciliate chaetae; lateral flaps with 8 + 8 smooth chaetae. Manubrium ventral chaetotaxy with slightly ciliate chaetae, 4 + 4 centrally displaced subapical chaetae ( Fig. 30View FIGURES 23 – 31); dens crenulate, without spines; mucro bidentate, with dental spine ( Fig. 31View FIGURES 23 – 31).

Etymology. The new species was named after its type locality. Bahiana  in Portuguese refers to who is born in Bahia State.

Habitat. The new species was collected from Chapada Diamantina National Park, in southern region of Caatinga Phytogeographic Domain, at the peak of “Pico do Barbado ” (at approximately 2033 meters of altitude), directly from exposed granitic rocks, during the raining season. Several collections were made in the surrounding areas and Entomobrya bahiana  sp. nov. was not found in any other locality.

Remarks. In the abdominal chaetotaxy, we considered as macrochaetae some large ciliate chaetae without broadened curved tips (sensu Soto-Adames et al. 2008), but with similar sized alveoli when compared to typical macrochaetae.

Entomobrya bahiana  sp. nov. is unique among the Neotropical species of the genus in the sum of the following characters: coloration (bluish without pigment over head, most of Th. II, anterior Abd. IV, tibiotarsi and distal furca), complexity of dorsal chaetotaxy, simple prelabral chaetae (not bifurcate), and lanceolate unguiculi ( Christiansen 1958, 1963, Arlé 1939, 1959, Arlé & Guimarães 1978, Soto-Adames 2002 b). Regarding color pattern, the new species is somehow similar to other uniformly pigmented Neotropical species, like: E. ciliata Börner, 1907  , E. infuscata Handschin, 1927  , E. litigiosa Denis, 1931  , E. longiseta Soto-Adames, 2002 b  , E. violacea Thibaud & Najt, 1987  and E. wheeleri Folsom, 1921  , but differs from all of them in the absence of pigments over most of Th. II and part of Abd. IV ( Christiansen 1963, Soto-Adames 2002 b). Concerning the dorsal chaetotaxy, Entomobrya bahiana  sp. nov. presents few resemblances with E. longiseta  and E. linda Soto-Adames, 2002 b  in the anterior half of head chaetotaxy (excepting the presence of S0 only in the new species) and partially in Abd. III, while differs in presenting a clearly more complex chaetotaxy in Th. II –III, Abd. II and IV ( Soto-Adames 2002 b). A detailed comparison among the three species is presented in Table 2.

Abbreviations used to represent characteristics: (-) absent; (+) present; (a) anterior; (m) medial; (p) posterior; (i) internal; (e) external.

Traditional Entomobrya  taxonomy is based mostly in color pattern ( Christiansen 1958, 1963, Christiansen & Bellinger 1980). However, the analysis of detailed dorsal chaetotaxies shows several species with similar color pattern and very distinct number and disposition of body chaetae, as presented by Jordana & Baquero (2005). At the current time, no other Brazilian Entomobrya  species was analyzed regarding its dorsal chaetotaxy, making it difficult to doubtless identify other species across the country. The review of the Brazilian (and part of the Neotropical) Entomobrya  species is in need to elucidate past identifications and to guide new descriptions to come.

Entomobrya bahiana  sp. nov. is the thirteenth species of the genus recorded to Brazil, along with E. aipatse Arlé, 1959  , E. ataquensis Arlé, 1959  , E. decora ( Nicolet, 1847)  , E. egleri Arlé & Guimarães, 1978  , E. griseoolivata ( Packard, 1873)  , E. inaequalis Denis, 1924  , E. nivalis ( Linnaeus, 1758)  , E. paroara Arlé & Guimarães, 1978  , E. spectabilis Reuter, 1895  , E. tupiana Arlé, 1939  , E. uambae Arlé, 1959  and E. wasmanni Handschin, 1924  ( Abrantes et al. 2010, 2012).

TABLE 2. Comparison of species of Neotropical Entomobrya.

  E. longiseta E. bahiana  sp. nov.
Th. II dorsal macrochaetae 0a+2m+4p    
Th. III dorsal macrochaetae 2a+1m+4p    

Kingdom

Animalia

Phylum

Arthropoda

Class

Entognatha

Order

Collembola

Family

Entomobryidae

Genus

Entomobrya

Loc

Entomobrya bahiana Bellini & Cipola

Bellini, Bruno C., Cipola, Nikolas G. & Godeiro, Nerivânia N. 2015
2015
Loc

E. longiseta

Soto-Adames 2002
2002
Loc

E. linda

Soto-Adames 2002
2002
Loc

E. violacea

Thibaud & Najt 1987
1987
Loc

E. egleri Arlé & Guimarães, 1978

Arle & Guimaraes 1978
1978
Loc

E. paroara Arlé & Guimarães, 1978

Arle & Guimaraes 1978
1978
Loc

E. aipatse Arlé, 1959

Arle 1959
1959
Loc

E. ataquensis Arlé, 1959

Arle 1959
1959
Loc

E. uambae Arlé, 1959

Arle 1959
1959
Loc

E. tupiana Arlé, 1939

Arle 1939
1939
Loc

E. litigiosa

Denis 1931
1931
Loc

E. infuscata

Handschin 1927
1927
Loc

E. inaequalis

Denis 1924
1924
Loc

E. wasmanni

Handschin 1924
1924
Loc

E. wheeleri

Folsom 1921
1921
Loc

E. ciliata Börner, 1907

Borner 1907
1907
Loc

E. spectabilis

Reuter 1895
1895
Loc

E. griseoolivata (

Packard 1873
1873
Loc

E. decora (

Nicolet 1847
1847
Loc

E. nivalis (

Linnaeus 1758
1758