Key to the southern South American Eurhopalothrix

AntWiki: The Ants --- Online

Key to the southern South American Eurhopalothrix species based on Chaul (2022).

See below for Portuguese and Spanish versions of this key.

Note: This key does not include Eurhopalothrix oxente, which was described after it was published.


1

  • Dorsum of head, mesosoma and metasoma entirely covered on appressed squamose setae. Small species (HW 0.38–0.45) (Fig. 3) => Eurhopalothrix bruchi (Argentina; Brazil: SC, PR, SP, RJ, MG, ES, BA; Paraguay)
  • Pilosity never as above, species either mostly glabrous having conspicuous standing setae, sparsely distributed, easily countable, forming symmetrical pairs and ground pilosity never squamose. Various sizes, usually larger than above => 2
Figure 3. Eurhopalothrix bruchi with its unique pilosity among the Neotropical Eurhopalothrix composed of a dense cover of appressed squamosed setae. Scale bar is 1 mm. (Chaul (2022), Fig. 3)

2

return to couplet #1

  • Transverse arched ridge present on face => 3
  • Transverse arched ridge absent on face => 4

3

return to couplet #2

Figure 4. Transverse arched carinae on head. A, carina on clypeus of Eurhopalothrix clypeata (UFV-LABECOL-000773, image by Jack Longino); B, carina on frontovertex of E. depressa (CASENT0636778, image by Jack Longino). (Chaul (2022), Fig. 4)

4

return to couplet #2

  • Dorsum of head, mesosoma and metasoma devoid of standing setae (Fig. 5, A) => Eurhopalothrix spectabilis (Brazil: BA, MG, SP, PR, SC; Paraguay).
  • Dorsum of head, mesosoma and metasoma having standing “pompon-like” setae (Fig. 5, B) => 5
Figure 5. Presence (black arrowheads) and absence of large, spatulate setae on dorsum of body. A, E. spectabilis (UFVLABECOL-008985); B, Eurhopalothrix reichenspergeri (UFV-LABECOL-000725). (Chaul (2022), Fig. 5)

5

return to couplet #4

  • Infradental propodeal lamella expanded at least in its upper portion (Fig. 6, A) => 6
  • Infradental propodeal lamella small and adjunct to the curvature of the propodeal descending surface (Fig. 6, B) => 7
Figure 6. Development of infradental lamella. A, expanded, subquadrate lamella of E. pilulifera (CASENT0618717, image by Brendon Boudinot); B, thin lamella, accompanying propodeal descending surface of Eurhopalothrix speciosa (CASENT0280767, image by Estella Ortega). (Chaul (2022), Fig. 6)

6

return to couplet #5

  • Projecting setae on anterior margin of scape considerably different from those on its dorsal surface. Infradental lamella expanded across its entire length. Large species (HW 0.96) => Eurhopalothrix lenkoi (Brazil: BA, ES, SP)
  • Scape without differentiated setae on its anterior margin when compared to those on its dorsal surface. Infradental lamella becomes thin on its lowermost level (Fig. 6, A). Small species (HW 0.53–0.58) => Eurhopalothrix pilulifera (Bolivia; Brazil: BA, GO)
Figure 6. Development of infradental lamella. A, expanded, subquadrate lamella of E. pilulifera (CASENT0618717, image by Brendon Boudinot); B, thin lamella, accompanying propodeal descending surface of Eurhopalothrix speciosa (CASENT0280767, image by Estella Ortega). (Chaul (2022), Fig. 6)

7

return to couplet #5

  • Dorsum of head with three pairs of standing setae; promesonotum with two pairs (both at the mesonotal level). Eye large, easily larger than diameter of tip of pompon-like seta as seen from above (Fig. 7, A) => Eurhopalothrix speciosa (Brazil: MG, RJ, SP, SC)
  • Dorsum of head with nine pairs of standing setae; promesonotum with four pairs (two at the pronotum level and two at the mesonotum level). Eye small, not much larger than diameter of tip of pompon-like seta as seen from above (Fig. 7, B) => Eurhopalothrix reichenspergeri (Brazil: MG, SP, SC)
Figure 7. Full-face view of heads of A, E. speciosa (CASENT0280767, image by Estella Ortega) and B, E. reichenspergeri (UFV-LABECOL-010765) comparing head setation and evincing the relative size of the compound eyes by comparing the eyes with expanded tips of the specialized setae. (Chaul (2022), Fig. 7)


Chave para as espécies de Eurhopalothrix do sul da América do Sul

1

  • Dorso da cabeça, mesossoma e metassoma cobertos por setas escamosas apressas. Espécie pequena (HW 0.38–0.45) (Fig. 3) => Eurhopalothrix bruchi (Argentina; Brazil: SC, PR, SP, RJ, MG, ES, BA; Paraguay)
  • Pilosidade do corpo nunca como descrita acima. Espécies glabras ou com conspícuas setas eretas, espaçadas e formando pares simétricos que são facilmente contáveis. Pilosidade apressa nunca escamosa. Espécies normalmente maiores que acima => 2
Figure 3. Eurhopalothrix bruchi with its unique pilosity among the Neotropical Eurhopalothrix composed of a dense cover of appressed squamosed setae. Scale bar is 1 mm. (Chaul (2022), Fig. 3)

2

return to couplet #1

  • Carena arqueada transversal presente na face => 3
  • Carena arqueada transversal ausente na face => 4

3

return to couplet #2

Figure 4. Transverse arched carinae on head. A, carina on clypeus of Eurhopalothrix clypeata (UFV-LABECOL-000773, image by Jack Longino); B, carina on frontovertex of E. depressa (CASENT0636778, image by Jack Longino). (Chaul (2022), Fig. 4)

4

return to couplet #2

  • Dorso da cabeça, mesossoma e metassoma sem setas eretas (Fig. 5, A) => Eurhopalothrix spectabilis (Brazil: BA, MG, SP, PR, SC; Paraguay)
  • Dorso da cabeça, mesossoma e metassoma com setas eretas, similares a “pom-poms” (Fig. 5, B) => 5
Figure 5. Presence (black arrowheads) and absence of large, spatulate setae on dorsum of body. A, E. spectabilis (UFVLABECOL-008985); B, Eurhopalothrix reichenspergeri (UFV-LABECOL-000725). (Chaul (2022), Fig. 5)

5

return to couplet #4

  • Lamela infradental do propódeo ampla, expandida (Fig. 6, A) => 6
  • Lamela infradental do propódeo pequena e acompanhando a curvatura da face descendente do propódeo (Fig. 6, B) => 7
Figure 6. Development of infradental lamella. A, expanded, subquadrate lamella of E. pilulifera (CASENT0618717, image by Brendon Boudinot); B, thin lamella, accompanying propodeal descending surface of Eurhopalothrix speciosa (CASENT0280767, image by Estella Ortega). (Chaul (2022), Fig. 6)

6

return to couplet #5

  • Setas que se projetam na margem anterior do escapo consideravelmente diferente daquelas na superfície dorsal. Lamela infradental do propódeo expandida em toda sua extensão. Espécie maior (HW 0.96) => Eurhopalothrix lenkoi (Brazil: BA, ES, SP)
  • Escapo sem setas diferenciadas entre sua superfície dorsal e aquelas próximas da sua margem anterior. Lamela infradental do propódeo afunilada em sua porção mais baixa (Fig. 6, A). Espécie menor (HW 0.53–0.58) => Eurhopalothrix pilulifera (Bolivia; Brazil: BA, GO)

7

return to couplet #5

  • Dorso da cabeça com três pares de setas eretas; promesonoto com dois pares (ambos na altura que corresponderia ao mesonoto). Olhos grandes, muito maiores que o diâmetro das setas eretas da cabeça na vista dorsal da cabeça (Fig. 7, A) => Eurhopalothrix speciosa (Brazil: MG, RJ, SP, SC)
  • Dorso da cabeça com nove pares de setas eretas; promesonoto com quatro pares (dois na altura que corresponderia ao pronoto e dois na altura do mesonoto). Olhos pequenos, não muito maiores que o diâmetro das setas pom-pom na vista dorsal da cabeça (Fig. 7, B) => Eurhopalothrix reichenspergeri (Brazil: MG, SP, SC)
Figure 7. Full-face view of heads of A, E. speciosa (CASENT0280767, image by Estella Ortega) and B, E. reichenspergeri (UFV-LABECOL-010765) comparing head setation and evincing the relative size of the compound eyes by comparing the eyes with expanded tips of the specialized setae. (Chaul (2022), Fig. 7)


Clave para las especies sureñas de Eurhopalothrix de América del Sur

1

  • Dorso de la cabeza, mesosoma y metasoma totalmente cubiertos de setas escamosas adpresas. Especie pequeña (HW 0.38–0.45) (Fig. 3) => Eurhopalothrix bruchi (Argentina; Brazil: SC, PR, SP, RJ, MG, ES, BA; Paraguay)
  • Pilosidad nunca como arriba. Especies glabras o con setas erguidas conspicuas, escasamente distribuidas y fácilmente contables, formando pares simétricos. Pilosidad baja, cuando presente, nunca escamosa. Especies normalmente más grandes que arriba => 2
Figure 3. Eurhopalothrix bruchi with its unique pilosity among the Neotropical Eurhopalothrix composed of a dense cover of appressed squamosed setae. Scale bar is 1 mm. (Chaul (2022), Fig. 3)

2

return to couplet #1

  • Carena arqueada transversal presente en el dorso de la cabeza => 3
  • Cresta arqueada transversal ausente en el dorso de la cabeza => 4

3

return to couplet #2

Figure 4. Transverse arched carinae on head. A, carina on clypeus of Eurhopalothrix clypeata (UFV-LABECOL-000773, image by Jack Longino); B, carina on frontovertex of E. depressa (CASENT0636778, image by Jack Longino). (Chaul (2022), Fig. 4)

4

return to couplet #2

  • Dorso de la cabeza, mesosoma y metasoma sin setas erguidas (Fig. 5, A) => Eurhopalothrix spectabilis (Brazil: BA, MG, SP, PR, SC; Paraguay)
  • Dorso de la cabeza, mesosoma y metasoma con setas erguidas, similar a pompones (Fig. 5, B) => 5
Figure 5. Presence (black arrowheads) and absence of large, spatulate setae on dorsum of body. A, E. spectabilis (UFVLABECOL-008985); B, Eurhopalothrix reichenspergeri (UFV-LABECOL-000725). (Chaul (2022), Fig. 5)

5

return to couplet #4

  • Lamela propodeal infradental grande, expandida (Fig. 6, A) => 6
  • Lamela propodeal infradental pequeña y adjunta a la curvatura de la face descendente del propodeo (Fig. 6, B) => 7
Figure 6. Development of infradental lamella. A, expanded, subquadrate lamella of E. pilulifera (CASENT0618717, image by Brendon Boudinot); B, thin lamella, accompanying propodeal descending surface of Eurhopalothrix speciosa (CASENT0280767, image by Estella Ortega). (Chaul (2022), Fig. 6)

6

return to couplet #5

  • Setas proyectadas en el margen anterior del escapo considerablemente diferentes de las de su superficie dorsal. Lamela infradental expandida en toda su longitud. Especie más grande (HW 0.96) => Eurhopalothrix lenkoi (Brazil: BA, ES, SP)
  • Escapo sin setas diferenciadas en su margen anterior en comparación con las de la superficie dorsal. Lamela infradental es delgada en su nivel más inferior (Fig. 6, A). Especie más pequeña (HW 0.53–0.58) => Eurhopalothrix pilulifera (Bolivia; Brazil: BA, GO)

7

return to couplet #5

  • Dorso de la cabeza con tres pares de setas erguidas; promesonoto con dos pares (ambos a nivel mesonotal). Ojo grande, mucho más grande que el diámetro del ápice de las setas en forma de pompones vistas desde arriba (Fig. 7, A) => Eurhopalothrix speciosa (Brazil: MG, RJ, SP, SC)
  • Dorso de la cabeza con nueve pares de setas erguidas; promesonoto con cuatro pares (dos a nivel del pronoto y dos a nivel del mesonoto). Ojo pequeño, no mucho más grande que el diámetro del ápice de las setas en forma de pompones vistas desde arriba (Fig. 7, B) => Eurhopalothrix reichenspergeri (Brazil: MG, SP, SC)
Figure 7. Full-face view of heads of A, E. speciosa (CASENT0280767, image by Estella Ortega) and B, E. reichenspergeri (UFV-LABECOL-010765) comparing head setation and evincing the relative size of the compound eyes by comparing the eyes with expanded tips of the specialized setae. (Chaul (2022), Fig. 7)

Referencess

Retrieved from "https://antwiki.org/wiki/index.php?title=Key_to_the_southern_South_American_Eurhopalothrix&oldid=718986"