Opamyrma, Yamane, Seiki, Bui, Tuan Viet & Eguchi, Katsuyuki, 2008
publication ID |
https://doi.org/ 10.5281/zenodo.274260 |
DOI |
https://doi.org/10.5281/zenodo.6229905 |
persistent identifier |
https://treatment.plazi.org/id/706887EE-B150-FFD8-FF4C-FDE4E33FF876 |
treatment provided by |
Plazi |
scientific name |
Opamyrma |
status |
gen. nov. |
Opamyrma gen. n.
( Figs. 1–12 View FIGURES 1 – 3 View FIGURES 4 – 6 View FIGURES 7 – 9 View FIGURES 10 – 12 )
Type species. Opamyrma hungvuong sp. n.
Worker description. Preoccipital carina complete, almost encircling the head slightly before its posterior margin (“poc” in Fig. 4 View FIGURES 4 – 6 ). Venter of head with a distinct and complete median furrow, with each anterolateral corner forming a process (“alc” in Fig. 3 View FIGURES 1 – 3 ). Clypeus posteriorly margined with a distinct continuous carina (“pcc” in Fig. 3 View FIGURES 1 – 3 ); median part of clypeus rather clearly divided into posterior horizontal portion and anterior steep slope; the posterior portion broadly inserted between antennal sockets, extending anteriorly to the level of posterior margin of the sockets; lateral part of clypeus narrow from front to back. Mandibular base with closed trulleum (“trl” in Fig. 3 View FIGURES 1 – 3 ). Labrum on its outer face with at least two rows of peg-like denticles, each with more than 10 denticles (“lpd” in Fig. 3 View FIGURES 1 – 3 ). Eye absent. Frontal lobe absent. Antennal sockets completely exposed in full-face view, directing almost dorsad, located in a large, roundly excavated area whose anterior wall is steep just behind the posterior margin of clypeus; the area not clearly defined posteriorly. Antenna 12- segmented, gradually incrassate from segment II to XII.
Mesosoma elongate, with a single furrow (“msf” in Figs. 6 View FIGURES 4 – 6 & 7 View FIGURES 7 – 9 ) which is deep and flexible and separates pronotum from the remaining part of mesosoma. Metapleural gland bulla round, occupying posterior twofifths of ventrolateral part of the pleuron; metapleural trench running below the bulla. Junction of dorsal and posterior faces of propodeum round without any transverse carina; posterior face of propodeum laterally without spines/carinae. Propodeal spiracle situated relatively low on the side of propodeum, near the weak furrow separating metapleuron from lateral side of propodeum. Propodeal lobe present, low and round.
Mid- and hind tibiae each with a reduced barbulate anterior spur (“ats” in Fig. 8 View FIGURES 7 – 9 ) and a well-developed pectinate posterior spur (“pts” in Fig. 8 View FIGURES 7 – 9 ). Pretarsal claws simple, without teeth.
Waist consisting of a single segment (petiole); petiole elongate, narrowly attached to abdominal segment III (gastral segment I), virtually without anterior peduncle; tergo-sternal sutures of petiole present as longitudinal furrows on ventrolateral edges that meet medially at 1/3 length of petiole from the base (“tss” in Fig. 10 View FIGURES 10 – 12 ); the sternite of petiole reduced to a small posteroventral sclerite, bounded by the conspicuous tergo-sternal sutures; petiolar spiracle located anteriorly on the lateral face of petiole at its mid-height.
Gaster very long, laterally compressed, especially in posterior portion, in profile highest at the posterior end of abdominal segment VI (“absg-VI” in Fig. 11 View FIGURES 10 – 12 ). Segment III (“absg-III” in Fig. 11 View FIGURES 10 – 12 ) seen from above longer than broad, narrowed basally, longer than segments IV, V and VI, having a free anterior face above the helcium; anteriormost part of abdominal sternite III (“abs-III” in Fig.11 View FIGURES 10 – 12 ) produced anteriad to the same level as the anteriormost part of tergite III (“abt-III” in Fig. 11 View FIGURES 10 – 12 ). Segment IV with differentiated presternite (“ps-IV” in Fig. 11 View FIGURES 10 – 12 ). Spiracles on segments V–VII concealed by the preceding segments. Segment VII (“absg-VII” in Fig. 11 View FIGURES 10 – 12 ) longest among the segments III–VII. Pygidium (“abt-VII” in Fig. 11 View FIGURES 10 – 12 ) and hypopygium (“abs-VII” in Fig. 11 View FIGURES 10 – 12 ) unarmed.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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