Rasopone Identification

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The table shown here is table 2 from: Longino, J.T. and M.G. Branstetter. 2020. Phylogenomic species delimitation, taxonomy, and ‘bird guide’ identification for the Neotropical ant genus Rasopone (Hymenoptera: Formicidae). Insect Systematics and Diversity. 4(2):1;1–33 (doi:10.1093/isd/ixaa004). In this study they explain: Identification should be carried out using diagnoses in individual species accounts, Figs. 6–13, and Table 2. These figures are standard images and a distribution map of each species, with species in order of mean HW. Specimen identification can be done by measuring the HW, going to that HW in the figures, and working up and down from there to locate potentially matching species. Table 2 provides a list of species in order of size, with key characteristics and geographic ranges." Text from the species accounts are also found on their respective Antwiki species pages and the Rasopone morphospecies page.

Longingo and Branstetter provided some context about these Rasopone identification resources.

The Rasopone identification resources are incomplete due to sampling limitations:

"The sampling of Rasopone species is still a long way from complete. Even with the intensive sampling in Middle America, we were able to examine a total of only 549 species occurrences (i.e., not counting duplicate occurrences of the same species within individual collection events). Among these, we recognized 29 species, but eight of these, nearly 30%, are still known from single occurrences. Panama and South America in particular are terra incognita, where a combination of greater sampling and DNA sequencing would undoubtedly reveal many additional species.

Details about the specimens used for this study:

This study was based on 549 separate species occurrence records. Most of the examined material was from the Middle American corridor (Veracruz, Mexico to Nicaragua). Almost all the specimens were from Winkler or Berlese samples of sifted leaf litter and rotten wood from wet forest habitats. Most material was from large-scale biodiversity inventory projects in Central America and southern Mexico, spanning 25 yr (Projects ALAS, LLAMA, and ADMAC). All holotypes and paratypes associated with the new species described here have unique specimen-level identifiers (‘specimen codes’) affixed to each pin, and most dry-mounted non-type specimens do as well. Specimen codes should not be confused with collection codes, which are associated with particular collection events. When reported, collection codes follow the collector. Collection data are derived from a specimen database and are not direct transcriptions of labels. Latitudes and longitudes, when present, are reported in decimal degrees, as a precise point (five decimal places) followed by an error term in meters. Material examined is not listed in the species accounts, but instead is available as digital supplementary material to this article (Supp Table 1 [online only]), at the journal’s website. Images of holotypes, distribution maps, and all specimen data on which this paper is based are available on AntWeb, where they are subject to future modification (data corrections and reidentifications).

Species HW CI SI PTI Clypeus Petiole Mandible Range Figures
Rasopone pluviselva 0.76–0.93  79–97  66–81  57–70  Truncate  Intermediate  Striate  Honduras-Panama 
Rasopone minuta 0.79–0.96  78–96  70–85  51–63  Truncate  Tapered  Smooth  Chiapas-Honduras 
Rasopone JTL043 0.85–1.04  81–98  72–87  54–65  Truncate  Cuboidal  Smooth  Ecuador 
Rasopone JTL048 0.88–1.08  80–98  73–89  49–59  Truncate  Intermediate  Smooth  French Guiana 
Rasopone MAS010 0.90–1.10  79–97  72–87  53–64  Truncate  Tapered  Striate  Costa Rica 
Rasopone cryptergates 0.96–1.18  77–95  71–87  51–63  Truncate  Cuboidal  Striate  Costa Rica 
Rasopone JTL042 0.99–1.21  81–99  71–87  49–60  Truncate  Intermediate  Striate  Colombia-Brazil 
Rasopone JTL034 0.99–1.22  83–102  69–85  52–64  Truncate  Intermediate  Smooth  Puebla-Honduras 
Rasopone lunaris 1.00–1.22  82–100  70–85  54–66  Truncate  Intermediate  Smooth  South America 
Rasopone guatemalensis 1.00–1.22  77–94  77–95  51–62  Truncate  Tapered  Smooth  Chiapas-Guatemala 
Rasopone costaricensis Form c 1.00–1.23  79–96  80–97  48–58  Truncate  Tapered  Striate  Costa Rica 
Rasopone JTL027 1.00–1.23  75–91  86–106  58–70  Truncate  Cuboidal  Striate  Panama 
Rasopone costaricensis 1.03–1.26  78–95  76–93  48–59  Truncate  Tapered  Striate  Costa Rica 
Rasopone politognatha 1.05–1.28  83–101  74–90  50–62  Truncate  Intermediate  Smooth  Chiapas-Nicaragua 
Rasopone JTL035 1.05–1.28  87–107  69–85  48–58  Truncate  Intermediate  Smooth  Veracruz 
Rasopone JTL049 1.07–1.31  82–100  69–85  55–67  Truncate  Intermediate  Smooth  Colombia 
Rasopone costaricensis Form b 1.07–1.31  77–94  82–100  49–60  Truncate  Tapered  Striate  Costa Rica 
Rasopone JTL047 1.09–1.33  86–105  66–81  53–65  Truncate  Intermediate  Smooth  French Guiana 
Rasopone panamensis 1.11–1.35  79–97  75–92  52–63  Truncate  Cuboidal  Striate  Costa Rica-Panama 
Rasopone subcubitalis 1.13–1.38  80–98  76–93  50–61  Truncate  Intermediate  Striate  Chiapas-Honduras 
Rasopone ferruginea 1.14–1.39  82–101  74–90  48–59  Sinuous  Tapered  Striate  Mexico-Nicaragua 
Rasopone JTL040 1.16–1.42  82–100  66–80  53–65  Truncate  Cuboidal  Smooth  Colombia 
Rasopone JTL041 1.19–1.45  83–101  74–91  50–61  Truncate  Tapered  Smooth  Colombia 
Rasopone costaricensis Form a 1.19–1.46  76–93  79–97  50–61  Truncate  Intermediate  Smooth  Costa Rica 
Rasopone JTL030 1.26–1.54  79–97  74–90  51–63  Truncate  Tapered  Striate  Panama 
Rasopone JTL037 1.27–1.55  80–98  83–101  46–56  Truncate  Intermediate  Striate  Guatemala 
Rasopone mesoamericana 1.33–1.62  80–98  76–93  50–61  Truncate  Tapered  Striate  Chiapas-Costa Rica 
Rasopone JTL029 1.37–1.67  84–102  67–81  50–61  Truncate  Intermediate  Striate  Panama 
Rasopone cubitalis 1.40–1.71  82–100  82–100  50–61  Sinuous  Cuboidal  Smooth  Nicaragua-Costa Rica 
Rasopone titanis 1.51–1.84  84–102  78–96  52–64  Sinuous  Tapered  Smooth  Chiapas 
Rasopone breviscapa 1.53–1.87  90–110  71–87  Truncate  Intermediate  Striate  Bolivia 
Rasopone rupinicola 1.53–1.87  78–96  95–117  Sinuous  Intermediate  Smooth  Panama-Colombia 

Additional Resources