Epicadus taczanowskii ( Roewer, 1951 )

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio, 2018, There and back again: More on the taxonomy of the crab spiders genus Epicadus (Thomisidae: Stephanopinae), Zootaxa 4382 (3), pp. 501-530: 516-519

publication ID

https://doi.org/10.11646/zootaxa.4382.3.4

publication LSID

lsid:zoobank.org:pub:87A2B333-09FF-4726-A1EF-0699FB631808

persistent identifier

http://treatment.plazi.org/id/501D87B1-6732-A42E-2390-F94E53E5BFF2

treatment provided by

Plazi

scientific name

Epicadus taczanowskii ( Roewer, 1951 )
status

 

Epicadus taczanowskii ( Roewer, 1951) 

Figs 8A–DView FIGURE 8, 9A–DView FIGURE9, 14E, FView FIGURE 14, 16AView FIGURE 16

Thomisus rugosus TaczanoWski, 1872: 95  (preoccupied by Latreille, 1804).

Stephanopis rugosa (TaczanoWski)  . Keyserling 1880: 177, pl. 4, fig. 97.

Tobias rugosus (TaczanoWski)  . Simon, 1895: 1051, 1053; F. O. Pickard-Cambridge, 1900: 161, pl. 10, figs 37–38. Tobias taczanowskii RoeWer, 1951: 448  (replacement name).

Epicadus taczanowskii ( RoeWer, 1951)  : Machado et al. 2017: 448, figs 2D, E, S11C, S14E, S15B, F.

Type material: Holotype (original designation): male, [Cayenne, French Guiana], (presumed in MZPW, lost).

Paratypes. 4 females, [Cayenne, French Guiana], (presumed in MZPW, lost).

Neotype. 1 ♀, Reserve Naturelle Nationale de la Trinité, [04°36'02"N, 53°24'43"W, Camp Aya , Guyane], C. Courtial leg., XII.2010 ( MCTP 41287View Materials).GoogleMaps 

Note. We get in contact with the curators of institutions where the holotype or syntypes of E. taczanowskii  could be potentially deposited (e.g. MZPWAbout MZPW, MNRJAbout MNRJ, OUMNH, MNHNAbout MNHN, ZMHB), however, this material seems to be lost. Once the species presents remarkable morphological features which allow us to identify it, and the geographical records of the examined material are congruent with those of the holotype, we propose designation of a neotype for E. taczanowskii  .

Other material examined. PANAMA: Colón: 3 males, Porto Bello , 9°32'56"N, 79°39'10"W, 12 August 1936, A.M. Chickering ( MCZAbout MCZ)GoogleMaps  ; 4 males, Barro Colorado Island ( Canal Zone ), 9°09'07"N, 79°50'47"W, 28 July 1936, A.M. Chickering ( MCZAbout MCZ)GoogleMaps  ; 1 male, June 1939; 4 males, July 1939 (MCZ); 2 males, 1–4J July 1950; 4 males, 1 female, 16–20 July 1950; 2 males, 23 July 1950; 4 males, 7 November 1950; 1 male, 2 July 1954; 1 male, 2 August 1954; 2 males, 15 August 1954; 2males, 4 February 1958; 1 male, 20 February 1958 (same collector and locality as previous specimens, MCZ); 1 female, Forest Reserve ( Canal Zone ), 9°04'39"N, 79°38'57"W, August 1939, A.M. Chickering ( MCZAbout MCZ)GoogleMaps  . BRAZIL: Pará: 2 males, Belém, Ilha de Cotijuba , 1°14'23"S, 48°32'47"W, November 2004, N.F. Lo-Man-Hung ( MPEG 4588View Materials)GoogleMaps  ; 1 male, November 2004, E.B.O. Marques (MPEG 4589); 1 male, November 2004, D.R. Santos-Souza (MPEG 4590); 1 male, Mata da UFPA, 1°27'20"S, 48°29'24"W, 18 August 2006, BGoogleMaps  . Calzavara (MPEG 4155); 1 male, 18 August 2006, Generino (MPEG 4175); 1 male, Vale do Igarapé Mutum, Platô do Rio Juruti , 2°36'11"S, 56°12'36"W, 4 August 2004, D.F. Candiani ( MPEG 8764View Materials)GoogleMaps  ; 1 male, Novo Progresso, Campo de Provas Brigadiro Veloso ( Serra do Cachimbo ), 9°22'02"S, 55°01'11"W, 12 September 2003, A.B. Bonaldo ( MPEG 5369View Materials)GoogleMaps  ; 1 male, 9 September 2003, same locality and collector ( MPEG 5435View Materials)GoogleMaps  . Amazonas: 6 males, 29 females, [labelled as “ Amazonas ”] ( MNHN 2617View Materials)  ; 4 males, Manaus, Fazenda Araçá, 3°07'40"S, 59°57'04"W, 8 July 1988, A.A. Lise (INPA); 1 female, Tefé , 3°21'07"S, 64°42'59"W ( MNHN 4270View Materials)GoogleMaps  . Rondônia: 1 male, Porto Velho , 8°48'10"S, 63°55'05"W, 8 July 2012, R.P. Indicatti ( MZSP 51461View Materials)GoogleMaps  . Acre: 1 female, Senador Guiomard, Reserva Extrativista de Catuaba , 10°08'43"S, 67°43'29"W, 2002, E.F. Morato ( IBSP 135288View Materials)GoogleMaps  . Bahia: 2 females, [labelled as “ Bahia ”] ( MNHN 18652View Materials)  ; 1 female, Fazenda Boa Esperança , 11°00'45"S, 40°51'19"W, 1973, A.T. Emothe ( IBSP 2697View Materials)GoogleMaps  . Mato Grosso: 2 females, [labelled as “ Mato Grosso ”] ( MNHN 10358View Materials ex.)  ; 1 female, Barra do Tapirape , 10°25'45"S, 51°16'53"W, 1–23 December 1961, B. Malkin ( AMNHAbout AMNH)GoogleMaps  ; 1 male, Canarana / Querência ( Fazenda Tanguro ), 13°04'25"S, 52°22'54"W, 10 June 2006, G. Dall'osto ( MPEG 22624View Materials)GoogleMaps  ; 1 male, 10 June 2006, D.F. Candiani (MPEG 22626); 1 male, 16 June 2006, N.F. Lo-Man-Hung (MPEG 22628); 1 male, 17 June 2006, D.F. Candiani (MPEG 22629). Espírito Santo: 1 male, Aracruz ( REFMU do Morro Aricanga ), 19°49'11"S, 40°14'14"W, 14–16 October 2005, TGoogleMaps  . Souza et al. (IBSP 133484); Minas Gerais: 1 female, Belo Horizonte, Estação Ecológica da UFMGAbout UFMG, 19°52'28''S, 43°58'22"W, 25 October 2008, IGoogleMaps  .L.F. Magalhães (UFMG 5852). São Paulo: 1 male, Itapevi , 23°32'13"S, 46°57'03"W, 1999, C. Bertim & V. Onófrio ( IBSPAbout IBSP 121962)GoogleMaps  .

Diagnosis. The females of E. taczanowskii  are similar to those of E. dimidiaster  sp. nov. in the general shape of opisthosoma, however, they differ in the rounded tips of the opisthosomal projections and in the granulose prosoma with a LBLAbout LBL ( Figs 8A, BView FIGURE 8, 16AView FIGURE 16); Males of E. taczanowskii  are very similar to those of E. dimidiaster  sp. nov. and E. trituberculatus  , being distinguishable only by the position of the TF and emergence area of embolous in ten o’clock position ( Fig. 9CView FIGURE9).

Description. Female ( MCTPAbout MCTP 41287 Neotype): Anterior eye row recurved and posterior slightly procurved, almost straight. Prosoma pale yellow with dark granules aggregated on the median region; front with clypeus presenting a dark upside-down V-shaped mark and ALE bearing short black stripes running parallel with this clypeal mark; TWS and LBLAbout LBL extending to the PME; thoracic MS discrete; chelicerae pale yellow with a diagonal dark stripe ( Figs 8A, BView FIGURE 8, 14FView FIGURE 14, 16AView FIGURE 16). Sternum, endites and labium with same color as prosoma. Opisthosoma pale yellow with dark granules outlining its dorsal edges, with an anterior pair of black stains, three opisthosomal projections facing backward and concave anterior border. Epigynum with copulatory openings facing sideways, separated by a large and flattened median septum; median field delimited by curved lateral folds that resemble upside-down commas ( Fig. 8CView FIGURE 8). Secondary spermathecae very large, almost the same size as primary ones; secondary spermathecae spherical ( Fig. 8DView FIGURE 8).

Measurements: eye diameters and interdistances: AME 0.12, ALE 0.20, PME 0.15, PLE 0.11, AME–AME 0.30, AME–ALE 0.19, PME–PME 0.41, PME–PLE 0.17; MOQ length 0.62, MOQ posterior width 0.54, MOQ anterior width 0.52; leg formula: 1-2-4-3: leg I—femur 4.21/ patella 2.38/ tibia 2.76/ metatarsus 1.95/ tarsus 1.41/ total 12.71; II—3.35/ 2.27/ 2.59/ 1.96/ 1.23/ 11.40; III—2.10/ 1.42/ 1.34/ 1.10/ 0.66/ 6.62; IV—2.52/ 1.20/ 1.59/ 1.41/ 0.64/ 7.36. Total body length 10.61; prosoma length 4.72, width 4.48; opisthosoma length 5.89; clypeus height 0.50; sternum length 2.09, width 1.52; endites length 1.00, width 0.53; labium length 0.67, width 0.76.

Male (from Canarana; MPEGAbout MPEG 022624): Eye arrangement as is female, ALE on discrete ocular mounds. Prosoma granulated, predominantly orange, darker at sides and median region ( Figs 9A, BView FIGURE9). Sternum orange with darker borders, labium endites and chelicerae reddish-brown. Clypeus orange with two diagonal darker taints ( Fig. 9BView FIGURE9). Opisthosoma light yellow, with discrete lateral projections, similar with those of males of E. dimidiaster  sp. nov. and E. taczanowskii  . Legs with orange femora, tibiae, tarsi and metatarsi; patellae yellow. Palpi with discoid tegulum, RTA long, acute and with margins bended, DTA pointed retrolaterally with tip directed upwards ( Fig. 9DView FIGURE9); TF emerging from tegulum at ten o’clock position ( Fig. 9CView FIGURE9).

Measurements: eye diameters and interdistances: AME 0.06, ALE 0.08, PME 0.07, PLE 0.04, AME–AME 0.12, AME–ALE 0.08, PME–PME 0.21, PME–PLE 0.10; MOQ length 0.28, MOQ posterior width 0.20, MOQ anterior width 0.19; leg formula: 1-2-4-3: leg I—femur 1.09/ patella 0.50/ tibia 0.70/ metatarsus 0.50/ tarsus 0.40/ total 3.19; II—0.92/ 0.50/ 0.68/ 0.50/ 0.40/ 3.00; III—0.72/ 0.36/ 0.44/ 0.33/ 0.22/ 2.07; IV—0.70/ 0.32/ 0.50/ 0.39/ 0.24/ 2.15. Total body length 2.56; prosoma length 1.30, width 1.24; opisthosoma length 1.26; clypeus height 0.22; sternum length 0.63, width 0.60; endites length 0.32, width 0.16; labium length 0.18, width 0.24.

Distribution. BRAZIL: São Paulo, Minas Gerais, Espírito Santo, Mato Grosso, Bahia, Acre, Rondônia, Amazonas, Pará; PANAMA: Colón ( Fig. 17BView FIGURE 17).

Variation. Females of E. taczanowskii  are most commonly found in vivo presenting a pale-yellow body coloration ( Figs 8AView FIGURE 8, 16AView FIGURE 16), but they may be pink ( Fig. 14EView FIGURE 14) or whitish with reddish-brown opisthosoma ( Fig. 14FView FIGURE 14).

MZPW

Polish Academy of Science, Museum of the Institute of Zoology

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

MNHN

Museum National d'Histoire Naturelle

MCZ

Museum of Comparative Zoology

AMNH

American Museum of Natural History

UFMG

Universidade Federal de Minas Gerais

IBSP

Instituto Biologico de Sao Paulo

LBL

Maria Curie-Sklodowska University

MCTP

Museu de Ciencias

MPEG

Museu Paraense Emilio Goeldi

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Thomisidae

Genus

Epicadus

Loc

Epicadus taczanowskii ( Roewer, 1951 )

Machado, Miguel, Teixeira, Renato Augusto & Lise, Arno Antonio 2018

2018
Loc

Thomisus rugosus

TaczanoWski, 1872 : 95

Loc

Stephanopis rugosa

Keyserling 1880 : 177

Loc

Tobias rugosus

Simon, 1895 : 1051 F. O. Pickard-Cambridge, 1900 : 161 RoeWer, 1951 : 448

Loc

Epicadus taczanowskii (

Machado et al. 2017 : 448