Aenictosymbia Maruyama, 2014
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publication ID |
https://doi.org/ 10.11646/zootaxa.3796.2.8 |
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publication LSID |
lsid:zoobank.org:pub:9F9DA323-128B-44A7-9414-798B50DAAC44 |
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DOI |
https://doi.org/10.5281/zenodo.4915257 |
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persistent identifier |
https://treatment.plazi.org/id/47028781-714F-FFBA-7E91-FAE5AF19FB30 |
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treatment provided by |
Felipe |
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scientific name |
Aenictosymbia Maruyama |
| status |
gen. nov. |
Aenictosymbia Maruyama View in CoL , gen. n.
( Figs. 10–32 View FIGURES 10–12 View FIGURES 13–23 View FIGURES 24–32 )
Type species: Aenictosymbia cornuta Maruyama View in CoL , sp. n.
Description. Body ( Figs. 10–12 View FIGURES 10–12 ) myrmecoid, slender, glossy.
Head ( Figs. 10–13 View FIGURES 10–12 View FIGURES 13–23 ) almost spherical, with horn on anterior part of frons, gently narrowed posteriad, constricted at base to form “neck”; medial area of head slightly depressed; eyes moderate in size, prominent; antennae ( Figs. 10–13 View FIGURES 10–12 View FIGURES 13–23 ) generalized, but segment I strongly thickened.
Mouthparts: Labrum ( Fig. 14 View FIGURES 13–23 ) generalized, rather irregularly with setae, without pseudopores; hypopharynx ( Fig. 14 View FIGURES 13–23 ) with mesal area bearing 3 campanifom sensillae, 3 setulae antero-medially, 4 setulae along lateral margin. Mandibles ( Fig. 15 View FIGURES 13–23 ) almost symmetric, but left mandible slightly thicker, with 2 patches of minute pseudopores around mesal area of dorsal disc, and 2 setae near base of outer margin. Mentum ( Fig. 16 View FIGURES 13–23 ) sub-trapezoidal, with 2–4 pseudopores, several setae around lateral margin. Labium ( Fig. 17 View FIGURES 13–23 ): apodeme with lateral lobe short, gently curved, rounded at apex, without medial projection; prementum with 2 real pores and 1 setal pore antero-laterally, strongly sclerotized along anterior margin to connect both bases of palpi; palpus with segment I long, more than 2 time as long as II, with patch of some minute setae near base ( Fig. 17 View FIGURES 13–23 : arrow; probably sensillae); segment III narrow, elongate; maxilla ( Fig. 18 View FIGURES 13–23 ) generalized, no or few pseudopores overall; lacinia with 5 spines near apex, densely with pubescence; galea curved near apex.
Pronotum ( Figs. 10–12 View FIGURES 10–12 , 19, 20 View FIGURES 13–23 ) elongate, constricted around basal 1/3, shallowly sulcate at midline; prosternite ( Fig. 20 View FIGURES 13–23 ) subtriangular, elongate, convex at midline; triangular sclerite present ( Fig. 20 View FIGURES 13–23 : arrow) from middle to near base of cavity.
Mesoventrite ( Fig. 21 View FIGURES 13–23 ) short, completely fused with metaventrite, weakly carinate between processes of both; metaventrite long, more than 2 times as long as mesoventrite; mesocoxal cavity slightly margined postero-laterally. Elytra ( Fig. 22 View FIGURES 13–23 ) rounded, well convex above; hind wings developed.
Legs ( Figs. 23–25 View FIGURES 13–23 View FIGURES 24–32 ) long, slender; claws developed; fore leg ( Fig. 23 View FIGURES 13–23 ) with coxa projected at base; base of femur projected ventrad; tarsal segments subequal in length; mid leg ( Fig. 24 View FIGURES 24–32 ) with coxa small, slightly longer than trochanter; tarsal segments becoming smaller from base to apex; hind leg ( Fig. 25 View FIGURES 24–32 ) with coxa deeply notched at middle (Fig, 25: arrow); tarsal segments becoming smaller from base to apex.
Abdomen strongly constricted at base (segments II–VI); tergite II rather long, shallowly emarginate on anterior margin; tergite III elongate, dilated apicad; sternite III with posterior area strongly triangularly convex ( Fig. 11 View FIGURES 10–12 : arrow; no distinct gland openings); tergites IV–VII short, transverse; stermites IV–VII large, strongly convex; tergite VIII with anterior margin rounded, without pseudopores or minute setae; sternite VIII with anterior margin slightly produced, rounded; tergite and sternite IX fused at base of tergite X of which anterior margin submembranous, truncate.
Male: median lobe of aedeagus ( Figs. 29, 30 View FIGURES 24–32 ) urceolate, strongly produced paramerally at base, with a pair of exposed sclerites of internal sac; paramere ( Fig. 31 View FIGURES 24–32 ) with basal part of paramerite short, narrow; velum extended near apex of apical lobe.
Female: spermatheca ( Fig. 32 View FIGURES 24–32 ) coiled at base, with apical part small.
Differential diagnosis. This genus is similar to Aenictophila Seevers, 1965 , in general appearance, the states of meso- and metaventrites, and abdomen, but the convexity of the abdominal sternites is simpler in Aenictosymbia . In Aenictophila , the posterior areas of both sternites III and IV are strongly convex, and their surfaces have distinct gland opening patches, including trichome-like bundles of pubescence on sternite III.
Etymology. A combination of the host genus name Aenictus , and the Greek words syn (meaning "with", "together") and bios (meaning "life", "living"), meaning a symbiont of Aenictus ants. Gender feminine.
Distribution. Central Thailand.
Systematic notes. This genus apparently belongs to the Aenictophila generic group, which is composed of myrmecoid genera of Lomechusini , namely, Aenictophila , Mimaenictus Kistner & Jacobson, 1975 , Procantonnetia Kistner & Jacobson, 1975 , Weissflogia Kistner, 1997. These genera including Aenictosymbia share an exoskeletal modification of a gland on abdominal sternite III (III–V in some genera). This characteristic, including the presence of a gland on sternite III, is not observed in other Lomechusini genera and suggests monophyly of the generic group. Phylogenetics and a detailed morphological study are in progress by MM and his colleagues.
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