The type locality of Misumenops pallens (Keyserling, 1880) is Brazil, Blumenau (Santa Catarina state?) [After Lehtinen & Marusik (2008)] but may be widespread at least across South America. There are several reported localities for it in South America, however almost all need renewed verification. The range is said to be "Guatemala to Argentina" although the presence of this species in Central American zone is dubius based only on few uncertain Guatemalan specimens, and possibly based on misidentifications (in Edwards 2017, Compare Misumessus quinteroi).
The location and identify of the original Keyserling material (in Keyserling 1880) from "Vera Paz area in Guatemala" remains unclear. It is possibly in Naturhistorisches Museum Wien (NMW = Vienna, austria) or Natural History Museum (NHM = London, UK). The identity needs to be reclarified.
The location and identify of the Godman and Salvin material from Guatemala in (F.O.Pickard-Cambridge (1900)) remains unclear. "Of this latter form there is also in the Godman and Salvin collection an example from Guatemala.". This material should be in NHM. The identity needs to be reclarified.
In Edwards 2017 for Misumessus oblongatus (senior synonym of Misumena americana) it says "I also have been unable to corroborate a Guatemala record as reported by the World Spider Catalog (2017), although it is possible that this species extends along the eastern coast of Mexico to eastern parts of Central America. If indeed a Misumessus, it is more likely that the Guatemala record represents Misumessus quinteroi sp. nov. as well, as there are verified records of M. quinteroi sp. nov. from eastern Guatemala." Also "Furthermore, Gertsch (1939) noted that Pickard-Cambridge (1900) mistakenly synonymized Misumenops pallens (Keyserling, 1880) with Misumena americana (= M. oblongus). Combining the information from Gertsch (1939) and Pickard-Cambridge (1900), it is apparent that there were two epigynal forms, one associated with M. americana, and one with M. pallens, and the Guatemala record matched the M. pallens form. Gertsch did not include this record in his distribution of M. oblongus. Therefore the Guatemala record of M. oblongus is considered erroneous - however neither of these referenced published studies detail any Guatemalan material (either that originally of Keyserling or later material of Pickard-Cambridge).
The species, Misumena pallens Keyserling, 1880 later as Misumenops pallens (Keyserling, 1880) was orignally described from a series of material which translates (p.97) as "This species seems to have a very wide distribution, in the Viennese k. k. Court cabinets are exemplars from Colombia and Brazil, I have some from New Granada and from the Vera Paz area in Guatemala. In the Zoological Museum of Warsaw is a female from Vathaypampa in Peru".
Lehtinen & Marusik (2008) designated a female lectotype for Misumena pallens Keyserling, 1880 from among the syntypes preserved in Naturhistorisches Museum Wien (NMW) as "Lectotype of Misumena pallens Keyserling, 1880 designated here from Brazil: Blumenau, leg. Hetschko (NMW acquisition no. 1886 XI 28)." *See also comment below about some Colombian material in the Keyserlng Collection. They do not clarify the fate of material from other orginal localities.
Lehtinen & Marusik (2008) do not provide any detailed description of their lectotype material, only comparing select characters to other taxa. They do not give clear views on the identification of past material by other authors, only vague statements such as "The syntypes of neither M. pallidus nor M. pallens were studied by Rinaldi (J. Gruber, pers. comm., 2006), but only Brazilian samples identified by Mello- Leitão, Piza, Soares, etc." and "Many of these species must be transferred from Misumenops to the still unnamed ‘‘Misumenops’’ pallens-group ( = Metadiaea sensu Rinaldi, 1988, in part) or to other unnamed taxa."
Elsewhere, F.O.Pickard-Cambridge (1900) compares the epigyne of several important speciemens "8. Misumenops americanus, Female vulva (type), 8a ditto female from St. Vincent" against another "9 Misumenops americanus, var. pallens, female vulva; 9a ditto, variety (Our figures are taken from Keyserling's types)". This suggests some syntypic material of Keyserling may be in th BMNH instead. He discussed the shape of the vulva of material assigned to pallens, however such features has proved variable in other taxa by later authors, and several of the non-type specimens used here can be misidentifications.
.^Note this species is later treated as the female of the older synonym of the North American Misumessus oblongatus (Keyserling 1880) from the male]
*They also mention other NMW collections under another species Misumenops pallidus (Keyserling, 1880) with "Two females and one juvenile specimen from Colombia, leg. Nolken (NMW acquisition no. 1873 I 15) most probably formed part of the original syntypes, but as all the original labels were changed 60–70 years ago, the possible original handwriting of Keyserling could not be checked. However, these specimens belong either to ‘‘Misumena’’ pallens Keyserling, 1880 or to a closely related species.". With labeling uncertainty, could this material be syntypic of M.pallens?