A taxonomic revision of the Neotropical myrmicine ant genus Lachnomyrmex Wheeler (Hymenoptera: Formicidae)
Feitosa, R. M.
Brandão, C. R. F.
Zootaxa
2008
1890
1
49
urn:lsid:biosci.ohio-state.edu:osuc_concepts:245584
Insecta
Formicidae
Lachnomyrmex
CoL
Animalia
Lachnomyrmex victori Feitosa & Brandão
Hymenoptera
43
Arthropoda
species
victori
Figures 17, 20
Holotypeworker. BRAZIL: Santa Catarina: Sao Bonifacio, P.E. da Serra do Tabuleiro, 27°49'06''S 48°54'41"W, 8-13.iii.2004, R.R. Silva, B.H. Dietz & N.L. Albuquerquecols, no. 27 [ MZSP]. Paratypes. same data as holotype, nos. 3/27 (3 workers and 1 gyne) [ MZSP]; same data, no. 27 (1 worker) [ CASC]; BRAZIL: Espirito Santo: Santa Teresa, E.B. Santa Lucia, 19°58'09''S 40°32'15''W, 20- 24.i.2002, J.H. Schoereder & C.R. Ribascols, no. 37 (2 workers) [ MZSP]; same data, no. 37 (1 worker) [ USNM]; Santa Catarina: Blumenau, P.E. das Nascentes, 27°06'15''S 49°09'14''W, 20-27.x.2000, R.R. Silva& F. Eberhardtcols, nos. 13/17/20/24 (4 workers) [ MZSP]; Parana: Tunas, P. das Lauraceas, 24°51'16''S 48°43'00''W, 21-29.ii.2001, R.R. Silva& F. Eberhardtcols, nos. 7/9/11/13/17/28/50 (6 workers e 1 gyne) [ MZSP]; same data, no. 7 (1 worker) [ AMNH]; same data, no. 7 (1 worker) [ BMNH]; same data, no. 7 (1 worker) [ ICNC]; same data, no. 7 (1 worker) [ IHVL]; same data, no. 9 (1 worker) [ INBC]; same data, no. 28 (1 worker) [ MIZA]; Sao Paulo: Salesopolis, E.B.B., 12-17.iv.1997, B.H. Dietz & C. I. Yamamotocols, nos. 4/24 (2 workers and 1 gyne) [ MZSP]; same data, no. 7 (1 worker) [ WPMC]; same locality, 20-26.x.1997, C. Klingenberg & C.I. Yamamotocols, no. 22 (1 worker) [ MZSP].
Worker diagnosis. Body irregularly covered by vermiculate, short, relatively sparse rugae; promesonotum moderately convex; metanotal groove shallowly impressed to obsolete; propodeal spines straight; teeth of propodeal lobes reduced and swollen basally; dorsum of postpetiole with more than 10 long hairs; first tergite of gaster devoid of long flexuous hairs.
Holotypemeasurements. HL 0.73; HW 0.72; ML 0.24; SL 0.47; EL 0.14; WL 0.85; PSL 0.17; PL 0.36; PPL 0.14; GL 0.98; TL 3.30; CI 98; SI 66; OI 20. Worker measurements (n=33). HL 0.52-0.76; HW 0.54-0.76; ML 0.16-0.25; SL 0.30-0.51; EL 0.08- 0.16; WL 0.57-0.93; PSL 0.11-0.21; PL 0.22-0.39; PPL 0.12-0.19; TL 2.26-3.51; GL 0.68-1.02; CI 97-103; SI 51-66; OI 15-22. Gyne measurements (n=9). HL 0.69-0.78; HW 0.69-0.79; ML 0.21-0.26; SL 0.44-0.49; EL 0.18-0.21; WL 0.85-1.06; PSL 0.16-0.22; PL 0.35-0.41; PPL 0.13-0.18; GL 0.94-1.17; TL 3.21-3.83; CI 99-101; SI 61-66; OI 24-279. Worker description. Body reddish-brown to black, with gaster and appendages slightly lighter. Body irregularly covered by short, relatively sparse rugae, somewhat longer and longitudinal on head dorsum; mandibles with short longitudinal striae restricted to basal portion; petiole and postpetiole finely and irregularly rugose. Abundant pilosity on head and promesonotum dorsum; dorsum of petiolar node and postpetiole each with more than 10 long hairs; first gastral tergite entirely devoid of long flexuous hairs. Head usually as long as broad, with vertexal margin moderately convex; frontal lobes laterally rounded; eyes with about seven facets on maximum diameter. Promesonotum moderately convex in profile, but distinctly higher than propodeum level; metanotal groove shallow to virtually obsolete; propodeal spines straight; teeth of propodeal lobes swollen and very reduced, with less than one-third of propodeal spines length. Petiolar node moderately elevated, dorsally rounded, and with the posterior face weakly sloped in lateral view; postpetiole weakly convex dorsally and without ventral processes. Gyne. Differing from worker by the following combination of characters: body pilosity denser and shorter, with first tergite of gaster bearing around 10 long flexuous hairs at the anterior portion, near postpetiole insertion; eyes with around 13 facets at greatest diameter; petiolar node comparatively lower.
Etymology. The name of this species is an homage to Victor Vieira da Silva, son of the colleague myrmecologist Rogerio Rosa da Silva.
Comments. While examining specimens of Lachnomyrmex plaumannifrom the MZSPcollection, one of us (RMF) noticed that there was a morphologically distinct subgroup of individuals, all collected in the same range of L. plaumanni. In the pin of one of these individuals there was a manuscript note made by Father Thomas Borgmeierin which he recognized a group of workers that differed from the typical L. plaumanniby the larger size and straight propodeal spines, rather than the curved ones of the latter. The study of recently collected Lachnomyrmexspecimens deposited in the MZSPcollection, led us to recognize these specimens and several others as a different and undescribed species sympatric with L. plaumanni. FIGURE 17. Paratypeworker of Lachnomyrmex victorifrom Santa Catarina, Brazil: A, head in full face view; B, lateral view; C, dorsal view. Image by Michele Esposito, specimen CASENT0173877. FIGURE18. Distribution maps for the Lachnomyrmexspecies ( L. fernandezi, L. grandis, L. laticeps, L. lattkei, L. longinoi, L. pilosus, and L. platynodus). FIGURE19. Distribution maps for the Lachnomyrmexspecies ( L. haskinsi, L. mackayi, L. nordestinus, L. plaumanni, L. regularis, and L. scrobiculatus). FIGURE20. Distribution map for the Lachnomyrmexspecies ( L. amazonicus, L. longinodus, and L. victori). Further than the characters pointed out by Borgmeier, workers of L. victorican be distinguished from L. plaumanniand the other congeners also by the promesonotum only moderately elevated, metanotal suture ill impressed, dorsum of postpetiole with more than 10 long hairs, and first gastral tergite devoid of long hairs. As far as we know, L. victorioccurs in the Atlantic Forest of southeastern Brazil, at 300-1050melevation. As in L. plaumanni, there is a single record of a L. victoriworker foraging in the vegetation. It was collected on the trunk of Croton floribundus (Euphorbiaceae), in the state of Sao Paulo (M.S. Morini, pers. comm.).
Additional material examined. BRAZIL: Bahia: Ilheus, iv.1996, J. Assiscol. (1 gyne) [ CPDC]; same locality, x.1996, L.S. Ramoscol., no. 5119 (2 workers) [ CPDC]; Marau, 23.x.1998, J.R.M. Santoscol. (1 worker) [ MZSP]; Sao Jose, Vitoria Puaias, 15°03'N 39° 20'W, 22.v.2000, J.R.M. Santoscol., no. A38 (1 worker) [ CPDC]; Parana: Bocaiuva, v.1963, F. Plaumanncol., no. 4000 (1 gyne) [ MZSP]; same locality, xi.1963, F. Plaumanncol., no. 3870 (1 worker) [ MZSP]; Santa Catarina: Chapeco, vi.1960, F. Plaumanncol. (1 gyne) [ MZSP]; Concordia, ix.1959, F. Plaumanncol., no. 8296a (1 worker) [ MZSP]; Ibicare, vii.1959, F. Plaumanncol., no. 3128 (4 workers) [ MZSP]; Nova Teutonia, ix.1954, F. Plaumanncol., no. 8216 (4 workers and 2 gynes) [ MZSP]; same locality, xi.1957, F. Plaumanncol. (1 worker) [ MZSP]; same locality, xii.1958, F. Plaumanncol., no. 8307 (1 worker) [ MZSP]; same locality, vii.1959, F. Plaumanncol. (1 worker) [ MZSP]; same locality, vi.1960, F. Plaumanncol., no. 3960 (1 worker and 1 gyne) [ MZSP]; same locality, vi.1963, F. Plaumanncol., no. 3710 (1 gyne) [ MZSP]; Seara, viii.1958, F. Plaumanncol., no. 2708 (3 workers) [ MZSP]; same data (1 worker) [ MZSP]; Sao Paulo: Cunha, P.E. da Serra do Mar, Nucleo Indaia, 23°15'03''S 45°00'26"W, 21-22.iv.2001, R.R. Silva& A.A. Tavarescols, no. 31 (3 workers) [ MZSP]; Mogi das Cruzes, P.N.M. da Serra do Itapeti, Trilha do Esquilo, 22.iv.1999, 23°29'22''S 46°11'55"W, A.S.M. Cassarotticol., no. C2.2 (1 worker) [ CPMS]; Ribeirao Grande, P.E. Intervales, Barra Grande, 24°18'30''S 48°25'10''W, 5.ii.1999, A.A. Tavarescol., no. T2-15 (1 gyne) [ MZSP].
1416638513
2004-03-08
2004-03-13
2004-03-08
MZSP
R. R. Silva, B. H. Dietz & N. L. Albuquerque
Brazil
-27.818335
Sao Bonifacio, P. E. da Serra do Tabuleiro
1
-48.911392
Santa Catarina
Holotype
1416638519
2004-03-08
2004-03-13
2004-03-08
MZSP
R. R. Silva, B. H. Dietz & N. L. Albuquerque
Brazil
-27.818335
Sao Bonifacio, P. E. da Serra do Tabuleiro
1
-48.911392
Santa Catarina
Paratypes
1416638510
2004-03-08
2004-03-13
2004-03-08
CASC
R. R. Silva, B. H. Dietz & N. L. Albuquerque
Brazil
-27.818335
Sao Bonifacio, P. E. da Serra do Tabuleiro
1
-48.911392
Santa Catarina
1416638489
2002-01-20
2002-01-24
2002-01-20
MZSP
J. H. Schoereder & C. R. Ribas
Brazil
-19.969168
Santa Teresa
1
-40.5375
E. B. Santa Lucia
Espirito Santo
1416638498
2002-01-20
2002-01-24
2002-01-20
USNM
J. H. Schoereder & C. R. Ribas
Brazil
-19.969168
Santa Teresa
1
-40.5375
E. B. Santa Lucia
Espirito Santo
1416638507
2000-10-20
2000-10-27
2000-10-20
MZSP
R. R. Silva, F. Eberhardt
Brazil
-27.104168
Blumenau
1
-49.15389
P. E. das Nascentes
Santa Catarina
1416638518
2001-02-21
2001-02-29
2001-02-21
MZSP
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638522
2001-02-21
2001-02-29
2001-02-21
AMNH
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638528
2001-02-21
2001-02-29
2001-02-21
BMNH
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638512
2001-02-21
2001-02-29
2001-02-21
ICNC
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638542
2001-02-21
2001-02-29
2001-02-21
IHVL
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638534
2001-02-21
2001-02-29
2001-02-21
INBC
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638546
2001-02-21
2001-02-29
2001-02-21
MIZA
R. R. Silva, F. Eberhardt
Brazil
-24.854445
Tunas
1
-48.716667
P. das Lauraceas
Parana
1416638538
1997-04-12
1997-04-17
1997-04-12
MZSP
B. H. Dietz & C. I. Yamamoto
Brazil
Salesopolis
Sao Paulo
1416638526
1997-04-12
1997-04-17
1997-04-12
WPMC
B. H. Dietz & C. I. Yamamoto
Brazil
Salesopolis
Sao Paulo
1416638527
1997-10-20
1997-10-26
1997-10-20
MZSP
C. Klingenberg & C. I. Yamamoto
Brazil
Salesopolis
Sao Paulo
1416638541
1996-04
CPDC
J. Assis
Brazil
Ilheus
Bahia
1416638547
1996-10
CPDC
L. S. Ramos
Brazil
Ilheus
Bahia
1416638525
1998-10-23
MZSP
J. R. M. Santos
Brazil
Marau
Bahia
1416638511
2000-05-22
CPDC
J. R. M. Santos
Brazil
15.05
Vitoria Puaias
1
-39.333332
Sao Jose
Bahia
1416638532
1963-05
MZSP
F. Plaumann
Brazil
Bocaiuva
Parana
1416638529
1963-11
MZSP
F. Plaumann
Brazil
Bocaiuva
Parana
1416638520
1960-06
MZSP
F. Plaumann
Brazil
Chapeco
Santa Catarina
1416638531
1959-09
MZSP
F. Plaumann
Brazil
Concordia
Santa Catarina
1416638530
1959-07
MZSP
F. Plaumann
Brazil
Ibicare
Santa Catarina
1416638536
1954-09
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638548
1957-11
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638533
1958-12
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638514
1959-07
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638523
1960-06
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638537
1963-06
MZSP
F. Plaumann
Brazil
Nova Teutonia
Santa Catarina
1416638544
1958-08
MZSP
F. Plaumann
Brazil
Seara
Santa Catarina
1416638550
1958-08
MZSP
F. Plaumann
Brazil
Seara
Santa Catarina
1416638552
2001-04-21
2001-04-22
2001-04-21
MZSP
P. E. da Serra do Mar, R. R. Silva, A. A. Tavares
Brazil
-23.250834
Nucleo Indaia
1
-45.00722
Cunha
Sao Paulo
1416638540
1999-04-22
CPMS
A. S. M. Cassarotti
Brazil
-23.489445
Trilha do Esquilo
1
-46.198612
Mogi das Cruzes, P. N. M. da Serra do Itapeti
Sao Paulo
1416638561
1999-02-05
MZSP
A. A. Tavares
Brazil
-24.308332
Barra Grande
1
-48.419445
Ribeirao Grande, P. E. Intervales
Sao Paulo