Khamul lanceolatus Gates

Gates, M. W., 2008, Description of Khamul, gen. n. (Hymenoptera: Chalcidoidea: Eurytomidae), with a hypothesis of its phylogenetic placement, Zootaxa 1898 (1), pp. 1-33: 30-31

publication ID 10.11646/zootaxa.1898.1.1


persistent identifier

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scientific name

Khamul lanceolatus Gates

n. sp.

Khamul lanceolatus Gates   , n. sp.

( Figs. 4 View FIGURES 2–9 , 16 View FIGURES 10–17 , 18, 20 View FIGURES 18–25 , 30 View FIGURES 26–33 , 58 View FIGURES 52–59 ; variants: 59–64)

Etymology: lanceolatus   (Latin, adjective) = a descriptor meaning lancelike, referring to the mandible.

Diagnosis and identification: Tegula brownish, apical mandibular tooth narrow, almost linear. Preorbital carinae finely produced ventrally but not delimiting a reniform subocular fovea, not produced as a triangular process between lateral ocellus and eye ( Fig. 60 View FIGURES 60–63 ). Marginal venation shorter than in other species of Khamul   ( Fig. 31 View FIGURES 26–33 ) and is bordered anteriorly by a membranous strip. Propodeal median channel distinctly delimited (Fig. 64) and the posterior invagination of the dorsellum is bisected.

Description: Female holotype. Length 5.3 mm. Head, antenna, body, and coxae black. Tegula pale brown. Legs black except for tibiae, tarsi and apical third of femora yellow. Pretarsus brown. Fore wing hyaline, venation brown.

Head. 1.43X as broad as high; 1.2X wider than pronotum; HTE:msp 3.40. POL 5.7X as long as OOL. Width of oral fossa 0.36X width of head. Clypeus separated from supraclypeal area by carina. Preorbital carina of uniform width beneath eye, reniform subocular fovea absent, carina not produced as triangular tooth at vertex. Scape 3.33X as long as broad. Antennal segment relative measurements 40:6:1:26:19:19:17:16:15:32. Clava 1.88X as long as broad.

Mesosoma. Dorsal pronotum 1.74X as broad as long. Mesoscutal midlobe 0.75X as broad as long. Scutellum 0.67X as broad as long; broadly convex dorsally, scutellar boss present, subequal in dimensions to two adjacent umbilicate puncta and surrounding border combined. Dorsellum disc composed of a central -shaped structure, depressed dorsally, connected laterally to submedian carinae ( Fig. 4 View FIGURES 2–9 ); posterior invagination bisected by carina. Propodeal median channel distinct, delimited laterally by carinae, composed of quadrate/ rectangular foveae ( Fig. 4 View FIGURES 2–9 ), channel bordered laterally by smaller, but distinct punctae. Relative measurements marginal:postmarginal:stigmal veins as 20:28:20; stigmal vein straight ( Fig. 31 View FIGURES 26–33 ).

Metasoma. Petiole 4.0X as broad as long in dorsal view; anterolaterally protuberant, anterior carinae weak; transverse ventral carina present basally, abutted by carinae and grooves ( Fig. 59 View FIGURES 52–59 ). Gastral terga measurements in dorsal view on median line as 15:32:50:40:16:6, syntergum not visible in dorsal view.

Male. Unknown. Extralimital male known, see below.

Variation. No appreciable variation in the type material.

Biology. The specimen from Mexico bears a label indicating that it was reared from an egg of Prisopus Gray   (Phasmatodea: Prisopodidae   ) associated with a leaf of Chamaedorea sp.   ( Arecaceae   ). Apparently, the specimen was reared at the San Antonio port-of-entry under some type of isolation. This record would not be a first phasmid egg parasitoid for the superfamily ( Eady 1956), but it would be the first for the Eurytomidae   .

Type material (2♀). Holotype: ♀ ( INBio); COSTA RICA: Guanacaste: Est. Murcilago, 8km S.O. de Cuajiniquil, 100m, 10–28.x.1993, L N 320300_347200, # 2403; COSTA RICA INBIO CRI001672408   . Paratype: ♀ ( USNM; dissected, SEM stub); same as for holotype   .

Other material examined (2♀). COSTA RICA: San José: Ciudad Colón, 800m, iv–v.90, col. Luis Fournier (♀ MZCR); MEXICO: intercepted at San Antonio, TX, 13.vii.1976; ex Prisopus   egg, Chamaedorea   leaf; n. genus – small prepectus!” det. E. Grissell, 1978; “near Neorileya   det. E. Grissell, 1996 (♀ USNM); PERU: Loreto, Explomapo Camp, Riio Napo, Rio Suscari,, 03 15’S 072° 55’W, Lot #382, T. L. Erwin, hand. coll. (♀ USNM).

Discussion and extralimital specimens. Khamul lanceolatus   differs from other species of Khamul   by the presence of an incomplete procoxal carina anteroapically that forms a partial shelf to receive the head. This condition is intermediate between other Khamul species   that have only a faint carina/change of sculpture and members of Philolema   s.l., Aximopsis   s.l., and Chryseida   , etc. that possess a complete carina. Also, K. lanceolatus   does not possess deep notauli as in other species of Khamul   . One male closely resembling K. lanceolatus   has been examined. This specimen is from a disparate Neotropical localities and different enough from the type material that caution is warranted before ascribing it to a specific hypothesis before enough material is at hand to understand intraspecific/sexual variation. Below, the label data for this specimen and brief differential diagnostics are reported.

BRASIL: Par: Oriximin, Alcoa Mine Rao, Rio Trombetas; 7–25.x.82, Rafael, Binde & Vidal, CDC Malaise; 00200087 (1♂ INPA). This unassociated male possesses pronounced preorbital carinae that create a concave habitus in dorsal view ( Fig. 60 View FIGURES 60–63 ), funiculars produced apicoventrally as sharp subtending flange ( Figs. 61–63 View FIGURES 60–63 ), apical margin of the clypeus is arcuate, propodeal sculpture distinctly different medially (Fig. 64), lateral panel of propodeum spanned by six carinae, petiole produced anterolaterally as angular flanges as wellas anteromedially as sharp, medially pointed carina. As no other males are known in this potential “ lanceolatus   species group, male species-group versus specific characters cannot be separated. However, males of other species of Khamul   , in general, do not possess such outstanding preorbital carinae (cf. Figs. 38 View FIGURES 36–43 , 44 View FIGURES 44–51 ), funiculars may be produced but not to the extent described above (cf. Fig. 69 View FIGURES 68–75 ), extreme apex clypeus emarginate (cf. Fig. 15 View FIGURES 10–17 ), propodeal sculpture different (cf. Figs. 46 View FIGURES 44–51 , 56 View FIGURES 52–59 ), lateral panel propodeum with umbilicate punctation, and petiole not flared anterolaterally (cf. Fig. 53 View FIGURES 52–59 ).

With respect to K. lanceolatus   , this specimen is currently placed in Khamul   but initially was suspected to be a new genus near Khamul   .


National Biodiversity Institute, Costa Rica


Smithsonian Institution, National Museum of Natural History


Museo de Zoologia


Tavera, Department of Geology and Geophysics