Table 1 Review of published descriptions of the labio-maxillary complex of Macrosiagonini
Taxon with reviewed reference | Maxilla | Labium |
|---|---|---|
Metoecus paradoxus (Linné), sensu Yablokov-Khnzoryan [45] | One segmented galea atrophied, much shorter than palpomere II; lacinia short, 3 × shorter than palpomere II | Ligula absent |
Macrosiagon spinipennis (Gerstaecker) sensu Gerstaecker [49] | One segmented galea as long as 4-segmented maxillary palpus; lacinia short, as long as palpomeres I and II combined | Labium not figured |
Macrosiagon bimaculatum (Fabricius), sensu Gerstaecker [49] | One segmented galea 1.35 × longer than 4-segmented maxillary palpus; lacinia short, as long as palpomeres I and II combined | Ligula as long as 2 distal labial palpomeres, bilobed at apex |
Macrosiagon bimaculatum (Fabricius), sensu Yablokov-Khnzoryan [45] | Two segmented galea 1.7 × longer than 3-segmented maxillary palpus, lacinia short, shorter than palpomere II | Ligula as long as 2 distal labial palpomeres, bilobed at apex |
Macrosiagon excavatum(Champion), sensu Manfrini de Brewer [51] | One segmented galea atrophied, much shorter than palpomere II; lacinia prolonged, much longer than palpomeres I-III combined | Ligula almost as long as 2 distal labial palpomeres with two prolonged lobes |
Macrosiagon flavipennis (Leconte), sensu Manfrini de Brewer [50, 51] | One(?) segmented galea 1.15 × longer than maxillary palpus; lacinia fused with stipes | Ligula absent |
Macrosiagon dimidiatum (Fabricius), sensu Hentz [28] | One segmented galea 2 × longer than maxillary palpus; distinct lacinia as long as palpomeres I-IV combined | Ligula present (but drawing is too small to be commented in more detail) |
Macrosiagon dimidiatum (Fabricius), sensu Williams [47] | Two segmented galea 1.4 × longer than maxillary palpus; fused stipes and lacinia shorter than palpomeres I-IV combined | Ligula much shorter than 2 distal labial palpomeres, bilobed at apex |
Macrosiagon dimidiatum (Fabricius), sensu Falin [48] | Two segmented galea 2 × shorter than maxillary palpus; fused stipes and lacinia shorter than palpomeres I-IV combined | Ligula much shorter than 2 distal labial palpomeres, bilobed at apex |
Macrosiagon caffrum (FÃ¥hraeus) sensu Franciscolo [39] | One-segmented galea with subclavate apex, lacinia long. Palpus not figured | Labium not figured |
Macrosiagon sp. (from Zanzibar) sensu Franciscolo [39] | One-segmented galea with clavate apex, lacinia knob-like. Palpus not figured | Labium not figured |
Melanosiagon serraticornis gen. et sp. nov | Galea at least as long as 2 basal palpomeres | Ligula with two prolonged lobes |