Pérez­Miles 1998 : 96 Bertani 2000 : 30 Cyriocosmus nigriventris Mello­Leitão, 1939 Metriopelma Hapalopus Metriopelma M . breyeri Becker, 1878 Cyriocosmus nigriventris Mello­Leitão, 1939 Metriopelma Hapalopus Hapalopus nigriventris ( Mello­Leitão, 1939 ) Revision of Cyriocosmus Simon, 1903, with notes on the genus Hapalopus Ausserer, 1875 (Araneae: Theraphosidae) Fukushima, Caroline Sayuri Bertani, Rogério Jr, Pedro Ismael Da Silva Zootaxa 2005 846 1 31 3JKGP Perez-Miles, 1998 Perez-Miles 1998 [264,759,1482,1508] Arachnida Theraphosidae Hapalopus Animalia Araneae 18 19 Arthropoda species butantan comb. nov.     Cyriocosmus butantan:  Pérez­Miles 1998: 96, figs 1–7. Holotypemale, IBSP 4948, ref. 55.854–2, and three paratypesmales refs. 55.854–2, 55.854–6, 55.854–7, from U.H.E. Balbina, Uatuman River, Presidente Figueiredo, Amazonas, Brazil, 13 January 1988, team of collectors of IBSP, examined;  Cyriocosmus elegans:  Bertani 2000: 30–31, 36 (misidentification).  Additional material examined: 1 female, IBSP9654 from Manaus, Amazonas, Rescue team from IBSP, February 1988, ref. 56112(3), 1 female, IBSP10968, 1 female, IBSP10969 from Balbina, Amazonas, U.H.E. Balbina, Faunal Rescue team from IBSP, ref. 55.854 and 55.854–5, respectively; 1 female, IBSP9252 from same locality and collector, May 1988, ref. 56765 (1).   FIGURES 51–54.  Hapalopus butantan. (51–53) Male holotype (IBSP 4948), Brazil, Amazonas, Uatuman River, Presidente Figueiredo. Left Palpal bulb, retrolateral (51), prolateral (52). (53) Left leg I tibial apophysis. (54) Female (IBSP 9654), Brazil, Amazonas, U.H.E. Balbina, Manaus. Spermatheca, dorsal. Scale bar = 1 mm. E = embolus, MB = membranous basis, PA = paraembolic apophysis, PI = prolateral inferior keel, PS = prolateral superior keel, R = ring­shaped keel. Diagnosis: Male can be distinguished by the presence of a palpal tibial apophysis with two megaspines and by the short paraembolic apophysis originating from a ring­shaped keel ( Figs 51–52). Female differs by the heart­shaped sclerotized portion of the spermatheca ( Fig. 54). Female ( IBSP9654): Total length, not including chelicerae or spinnerets, 29.67. Cephalothorax length 11.17, width 10.83. Anterior eye row procurved, posterior row slightly recurved. Eye sizes and interdistances: AME 0.33, ALE 0.38, PME 0.33, PLE 0.33; AME­ AME 0.22, AME­ALE 0.11, PME­PME 0.94, PME­PLE 0.05, ALE­PLE 0.11 AME­PME 0.15, ALE­ALE 1.22, PLE­PLE 1.22. Eye tubercle length 1.28, width 1.83; clypeus absent. Fovea procurved, slightly deep and wide. Labium length 1.17, width 1.67, with 8 cuspules, maxillae with approximately 50 cuspules on the inner corner. Sternum length 4.33, width 4.17. Sigilla: second pair more than one diameter from margin, third pair twice diameter of first pair, more than one diameter from margin, fourth pair twice diameter of third pair, more than one diameter from margin. Chelicerae with 14 well developed teeth on promargin and a lateral row of small teeth. Tarsi I–IV densely scopulate, tarsi I divided by a narrow band of setae, II–IV widely divided by setae. Metatarsi I–II densely scopulate along 1/3 of article, III scopulate along 1/5 and IV without scopulae. Length of legs and palpal segments in Table 6. Spination: femurs I–IV and palp 0; patellae I–IV and palp 0; tibiae I v 0­0­1 (apical), II v 0­0­1 (apical), III v 0­0­2 (apicals), p 1­0­0; IV v 0­0­2 (apicals), p 0­1­0, r 0­0­1 and palp v 0­0­2 (apicals); metatarsi I v 0­2­2 (apicals); II v 0­2­4 (apicals), p 0­1­1; III v 0­2­3 (2 apicals), p 1­1­2, r 0­1­1; IV v 1­2­7 (5 apicals), p 1­1­1, r 1­2­1. Coxae I–IV without stridulatory hairs. Spermathecae with a single receptacle having a membranous base. Posterior lateral spinnerets with three articles, basal as long as digitiform apical, median half length of both; lateral median spinnerets with one article. Urticating typeIV hair on dorsum of the abdomen. Cephalothorax dark brown with a wide bright yellow area on the border; labium, maxillae, sternum and coxae reddish brown; legs light brown. Abdomen with a characteristic pattern ( Fig. 55).   FIGURE 55.  Hapalopus butantanfemale (IBSP 9654), Brazil, Amazonas, U.H.E. de Balbina, Presidente Figueiredo, color pattern. From left top, in clockwise direction: cephalothorax, dorsal abdomen, lateral abdomen and ventral abdomen.   TABLE 6.  Hapalopus butantan, female (IBSP 9654). Measurements of legs and palp.    I II III IV Palp  Femur 6.5 5.92 5.67 7.0 5.83  Patella 4.58 3.92 3.42 3.67 3.5  Tibia 4.75 4.2 4.0 5.33 3.75  Metatarsus 3.92 3.92 5.17 7.83 ­­­ Distribution: Known only from typelocality, U.H.E. Balbina, Presidente Figueiredo, State of Amazonas, Brazil.    Cyriocosmus nigriventris Mello­Leitão, 1939, holotypefemale from Falcon, Venezuela, deposited in Basel Museum ( Switzerland), not examined, was transferred to  Metriopelmaby Pérez­Miles (1998), based on the presence of a single oval spermatheca. However, the original illustration given by Mello­Leitão shows a specimen with a very characteristic abdominal color pattern, a lateral series of six red spots on each side and two median anterior red spots. The ventral abdomen is dark with one lateral series with four red spots at each side. This pattern, as well as the presence of a single oval spermatheca, is similar to the one presented in species of  Hapalopus, which can be found in Venezuela. The female of the typespecies of the genus  Metriopelma,  M. breyeriBecker, 1878is undescribed and it is not possible to know whether it has one or two spermathecae. Thus,  Cyriocosmus nigriventris Mello­Leitão, 1939is transferred from  Metriopelmato  Hapalopus,and a new combination  Hapalopus nigriventris( Mello­Leitão, 1939)is proposed.