Glenognatha argyrostilba ( O. Pickard-Cambridge, 1876 ),

Jimmy Cabra-García & Antonio D. Brescovit, 2016, Revision and phylogenetic analysis of the orb-weaving spider genus Glenognatha Simon, 1887 (Araneae, Tetragnathidae), Zootaxa 4069 (1), pp. 1-183: 45-52

publication ID

http://doi.org/10.11646/zootaxa.4069.1.1

publication LSID

lsid:zoobank.org:pub:52FC658C-78C7-49FC-9961-8AC43CA03101

persistent identifier

http://treatment.plazi.org/id/8E0E8F67-7D3E-FFBB-ACBA-0B45FD12D6AE

treatment provided by

Plazi

scientific name

Glenognatha argyrostilba ( O. Pickard-Cambridge, 1876 )
status

new combination

Glenognatha argyrostilba ( O. Pickard-Cambridge, 1876)  new combination

( Figs. 31–37View FIGURE 31View FIGURE 32View FIGURE 33View FIGURE 34View FIGURE 35View FIGURE 36View FIGURE 37, 131View FIGURE 131)

Pachygnatha argyrostilba O. Pickard-Cambridge, 1876: 573  , pl. 59, fig. 8 (male lectotype and female paralectotype from Alexandria, Egypt, deposited in Hope Entomological Collection, Oxford, not examined).

Dyschiriognatha argyrostilba: Simon, 1893: 324  ; Bosmans & Bosselaers 1994: 346, fig. 132–147; Saaristo 2003: 22, fig. 19– 20; Saaristo 2010: 233, fig. 36.24–26; Cabra-García et al. 2014: 1029, figs. 1C, 2B, 4 A, 5B –C, 7B; World Spider Catalog 2015.

Pachygnatha (Dyschiriognatha) argyrostilba: Pavesi, 1895: 504  .

Dyschiriognatha montana Simon, 1897: 868  (male and female syntypes from St. Vincent Islands, Lesser Antilles, deposited in BMNH, examined through photographs of the habitus and male genitalia). New synonymy.

Glenognatha mira Bryant, 1945: 405  (female holotype from Miragoane , Haiti, 2.xi.1934, Darlington leg., deposited in MCZ, examined). New synonymy. 

Dyschiriognatha atlantica Holm, 1969: 63  , fig. 1–5 (male holotype from Sandy bay beach, St. Helena island, 11.i.1966, P. Basilewsky, P. Benoit & N. Leleup leg., deposited in MRAC, not examined); Benoit 1977: 160, figs. 69a –e. Synonymized by Bosmans & Bosselaers 1994.

Glenognatha maelfaiti Baert, 1987: 141  , figs. 1–7 (male holotype from Cerro Maternidad, Santa Cruz, Galápagos, Ecuador, 15.ii –1.iii-1986, deposited in RBINS, not examined, paratypes: 13♀ 2♂ 1 immature from Transect Pto. Ayora-Itabaca, zflank, Santa Cruz, Galápagos, Ecuador, 15.ii –1.iii-1986 Baert, Maelfait et Desender leg., deposited in RBINS 27047, examined; 36♀ 19♂ 5 immature from Santa Cruz, Galápagos, Ecuador, deposited in RBINS, not examined); Cabra-García et al. 2014: 1029, figs. 1N, 3B, 4E, 6C, 8G. New synonymy.

Transfer justification. Study of D. argyrostilba  specimens collected in Africa and drawings of the type material (see Bosmans & Bosselaers 1994), shows that this species has all the synapomorphies of the genus Glenognatha  . Conductor ( Figs. 35B –CView FIGURE 35, 37 A –BView FIGURE 37), embolus ( Figs. 35DView FIGURE 35, 37 A –BView FIGURE 37), paracymbium ( Figs. 35HView FIGURE 35, 37BView FIGURE 37), female genitalia ( Figs. 36 A –D, G –JView FIGURE 36) and tracheal system ( Figs. 36E –F, 36K –MView FIGURE 36) exhibit the typical Glenognatha  morphology.

Synonymy justification. Examination of the available type material of D. montana  , G. mira  and G. maelfaiti  , shows that these types have the diagnostic characters of G. argyrostilba  and these three species should be considered as junior synonyms. Male palps of D. montana  and G. maelfaiti  have the conductor lamina sinuous in ventral view and the conductor retrolateral apophysis tip sharpened as observed in G. argyrostilba  . In addition, the uterus externus of G. mira  and G. maelfaiti  is wider than long as characteristic for G. argyrostilba  . It was not possible to examine the female genitalia of D. montana  , nevertheless based on the male palp and the female chelicerae morphology we consider it as a junior synonym of G. argyrostilba  .

Diagnosis. Males and females of G. argyrostilba  resemble those of G. dentata  and G. tangi  by the presence of pore-bearing and setae-bearing depressions on the lateral surface of the carapace ( Figs. 31 A, EView FIGURE 31, 37D –EView FIGURE 37). Males can be distinguished from the former by the absence of tooth-like projections on the conductor lamina ( Fig. 37 AView FIGURE 37) and from the latter by the shape of the conductor lamina which is sinuous in ventral view ( Figs. 35BView FIGURE 35, 37 AView FIGURE 37). Females can be distinguished from both species by the UE which is wider than long ( Figs. 36 A, GView FIGURE 36).

Description. Male and female described by Bosmans & Bosselaers (1994). Additional data.

Male ( CAS 9056025). Habitus as in Figures 31 A –DView FIGURE 31. Cephalothorax with lateral pore-bearing and setae-bearing depressions ( Fig. 31 AView FIGURE 31). Chelicerae with reduced CFO ( Fig. 33 AView FIGURE 33). Prt2 and Prt3 closer to each other than to Prt1 ( Figs. 33 A, CView FIGURE 33). Ret2 and Ret3 closer to each other than to Ret1 ( Fig. 33B –CView FIGURE 33). Palp as in Figures 35E –HView FIGURE 35. Conductor enclosing the embolus ( Figs. 35 A, EView FIGURE 35).

Female ( CAS 9056025). Habitus as in Figure 31E –HView FIGURE 31. Cephalothorax with lateral pore-bearing and setaebearing depressions ( Fig. 31EView FIGURE 31). Sternum with setae-bearing depressions ( Fig. 37CView FIGURE 37). Chelicerae as in Figures 33D – FView FIGURE 33. Tracheal system as in Figures 36E –FView FIGURE 36. Genitalia as in Figure 36 A –DView FIGURE 36. Spermathecae well-developed ( Fig. 36DView FIGURE 36). UE entire ( Fig. 36 AView FIGURE 36).

Variation. Male total length 1.6–2.2 (N =10; average 2.0), cephalothorax length 0.8–1.2 (N = 10; average 1.0), femur I length 1.0–1.3 (N = 10; average 1.2). Female total length 2.1–2.6 (N = 10; average 2.4), cephalothorax length 0.9–1.1 (N = 10; average 1.0), femur I length 1.1–1.4 (N = 10; average 1.2). Habitus and chelicerae of Ecuadorian specimens as in Figures 32View FIGURE 32 and 34View FIGURE 34.

Distribution. Known from the Neotropical and Afrotropical regions ( Fig. 131View FIGURE 131).

Additional material examined (N = 31). ECUADOR: Galápagos: Isabela, [0º55´S, 91º0´W], elev. 2m, 2– 15.iii.1989, Peck & Sinclair leg., 1♂ ( AMNH); [0º16´S, 90º41´W], elev. [300m], 10.iv.1982, Y. Lubin leg., 2♀ ( MCZ 125476View Materials).GoogleMaps 

New records. SOUTH AND CENTRAL AMERICA: CUBA: Pinar del Río: Soroa , [22º46´S, 82º59´W], elev. [82m], 27–29.iv.1983, P.J. Sangler & Iliana Fernandez G. leg., 1♂ ( USNM)GoogleMaps  ; San Vicente, [20º5´S, 75º46´W], elev. [125m], 7.ii.1981, P. J. Spangler & A. Vega leg., 2♂ 6♀ ( USNM)GoogleMaps  . Sancti Spiritus: Gaviña, Sierra Escambray  , [21º56´S, 79º26´W], elev. [67m], 13.ii.1981, P.J. Spangler & A. Vega leg., 1♀ ( USNM)GoogleMaps  . HAITI: Sud: Lévy (1 Km NE), [18º18´N, 73º 51´W], elev. [185m], 10–11.ix.1981, P. Spangler & R. Faitoute leg., 1♂ ( USNM)GoogleMaps  . JAMAICA: Kingston: [18º16´S, 77º6´W], elev. [341m], 26.viii.1934, Darlington leg., 1♂ ( MCZ 125504View Materials)GoogleMaps  . DOMINICA: [15º26´S, 61º20´W], elev. [310m], 5.x.1964, P. J. S. leg., 1♀ ( USNM)GoogleMaps  . ECUADOR: El Oro: Arenillas (18 Km SE), La Cuca. Exp. Sta. , [3º33´S, 80º2´W], elev. [77m], 22.v.1979, Jos J. Anderson leg., 1♀ 1♂ ( USNM)GoogleMaps  ; Guayas: Naranjal (30 Km N), [2º40´S, 79º36´W], elev. [24m], 24.xii.1977, Jos J. Anderson leg., 1♀ 1♂ ( USNM)GoogleMaps  ; Manabí: Chone , [0º41´S, 80º5´W], elev. [65m], 7.i.1978, P. J. Spangler & J. Anderson leg., 1♂ ( USNM)GoogleMaps  . BRAZIL: Ceará: Fortaleza, UFCE, Campus de Itaperi [3º47´S, 38º33´W], elev. [26m], 8.vii.2011, R. Azevedo leg., 1♀ ( IBSP 166730View Materials)GoogleMaps  ; 1♀ (IBSP 166732). Bahia: Mucugê, Reserva Particular do Patrimônio Natural Adília Paraguassu , [12º59´S, 41º23´W], elev. [1067m], 3–7.vii.2005, J. P. Souza & Alves leg., 1♀ ( IBSP 56557View Materials)GoogleMaps  . Paraná: Porto Rico, [22º47´S, 53º16´W], elev. [271m], v.2009, E. R. Cunha leg., 1♂ ( MPEG 15435View Materials)GoogleMaps  . AFRICA. NIGERIA: Kabba: Kabba ,: [7º50´N, 6º4´E], elev. [458m], 19–23.ii.1949, B. Malkin leg., 2♀ 2♂ ( CAS 9056025View Materials)GoogleMaps  . REPUBLIC OF CÔTE D'IVOIRE: [Vallée du Bandama region]: Bouaké , [7º41´N, 5º1´W], elev. [350m], 7.x.1995, Russel-Smith A. leg., 1♂ ( MRAC 227412View Materials)GoogleMaps  . CAMEROON: [Southwest Region]: Matute, Tiko, [4º7´N, 9º24´E], elev. [30m], 14.iv.–6.v.1949, B. Malkin 1♂ ( CAS 9039595View Materials)GoogleMaps  .

MCZ

Museum of Comparative Zoology

CAS

California Academy of Sciences

AMNH

American Museum of Natural History

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Tetragnathidae

Genus

Glenognatha

Loc

Glenognatha argyrostilba ( O. Pickard-Cambridge, 1876 )

Jimmy Cabra-García & Antonio D. Brescovit 2016
2016
Loc

Glenognatha maelfaiti

Cabra-Garcia 2014: 1029
Baert 1987: 141
2014
Loc

Dyschiriognatha argyrostilba:

Cabra-Garcia 2014: 1029
Saaristo 2010: 233
Saaristo 2003: 22
Bosmans 1994: 346
Simon 1893: 324
1994
Loc

Dyschiriognatha atlantica

Benoit 1977: 160
Holm 1969: 63
1977
Loc

Pachygnatha argyrostilba

Pickard-Cambridge 1876: 573
Loc

Pachygnatha (Dyschiriognatha) argyrostilba: Pavesi, 1895 : 504

Pavesi 1895: 504
Loc

Dyschiriognatha montana

Simon 1897: 868
Loc

Glenognatha mira

Bryant 1945: 405