Carinadelius Ranjith & van Achterberg, 2021

Ranjith, A. P., Achterberg, C. Van, Samartsev, K. G. & Nasser, M., 2021, Discovery of the chelonine tribeAdeliini Viereck, 1918 (Hymenoptera: Braconidae) from the Indian subcontinent with the description of a new genus from south India, Zootaxa 4926 (1), pp. 1-25 : 4-6

publication ID

https://doi.org/ 10.11646/zootaxa.4926.1.1

publication LSID

lsid:zoobank.org:pub:F151B4E4-26FD-42CE-9F4D-0D8931AAF93F

DOI

https://doi.org/10.5281/zenodo.4531862

persistent identifier

https://treatment.plazi.org/id/6A7F6D98-D1D5-40D6-AFBE-0E3D788FD5CD

taxon LSID

lsid:zoobank.org:act:6A7F6D98-D1D5-40D6-AFBE-0E3D788FD5CD

treatment provided by

Plazi

scientific name

Carinadelius Ranjith & van Achterberg
status

gen. nov.

Carinadelius Ranjith & van Achterberg gen. nov.

Figs 1–2 View FIGURE 1 View FIGURE 2

urn:lsid:zoobank.org:act:6A7F6D98-D1D5-40D6-AFBE-0E3D788FD5CD

Type species: Carinadelius medicus Ranjith & van Achterberg sp. nov.

Description. Female.

Head. Antenna with 21 antennomeres ( Fig. 2A View FIGURE 2 ). Scape without modifications, longer than wide ( Fig. 2A View FIGURE 2 ). Pedicel short ( Fig. 2A View FIGURE 2 ). Terminal antennomere blunt ( Fig. 2A View FIGURE 2 ). Antennomeres 3–8 longer than wide, rest as long as wide ( Fig. 2A View FIGURE 2 ). Head slightly transverse in anterior view ( Fig. 1B View FIGURE 1 ). Eyes long setose ( Figs 1B & C View FIGURE 1 ). Labrum concealed by clypeus ( Fig. 1B View FIGURE 1 ). Malar suture present ( Fig. 1B View FIGURE 1 ). Head wider than long in dorsal view ( Fig. 1C View FIGURE 1 ). Ocelli small, arranged in equilateral triangle ( Fig. 1C View FIGURE 1 ). Frons slightly concave medially ( Fig. 1C View FIGURE 1 ). Occipital carina complete dorsally ( Fig. 1C View FIGURE 1 ), absent ventrally, not connected with hypostomal carina ( Figs 1A & E View FIGURE 1 ). Vertex faintly crenulate medially near occipital carina ( Fig. 1C View FIGURE 1 ). Mandible curved ( Fig. 1B View FIGURE 1 ). Face weakly convex in lateral view ( Fig. 1E View FIGURE 1 ). Tentorial pit rather small ( Fig. 1B View FIGURE 1 ). Palps short. Maxillary palp 5-segmented. Labial palp 3-segmented ( Fig. 1E View FIGURE 1 ).

Mesosoma. Mesosoma dorso-ventrally flattened ( Fig. 1E View FIGURE 1 ). Propleuron crenulate posteriorly and laterally ( Fig. 1E View FIGURE 1 ). Propleural lobe present ( Fig. 1E View FIGURE 1 ). Mesoscutum smooth, setose, with indistinct lateral carina and distinct posterior transverse carina ( Fig. 1D View FIGURE 1 ). Notauli absent ( Fig. 1D View FIGURE 1 ). Scutellar sulcus arch-shaped, crenulated ( Fig. 1D View FIGURE 1 ). Scutellum smooth, sparsely setose ( Fig. 1D View FIGURE 1 ). Lateral sides of scutellum distinctly crenulate ( Fig. 1D View FIGURE 1 ). Metanotum smooth ( Fig. 1D View FIGURE 1 ). Mesopleuron smooth ( Fig. 1E View FIGURE 1 ). Precoxal sulcus long, smooth sometimes weakly crenulate ( Fig. 1E View FIGURE 1 ). Metapleuron smooth with distinct medial pit ( Fig. 1E View FIGURE 1 ). Propodeum with distinctly marginated smooth areas ( Fig. 1F View FIGURE 1 ). Propodeum slightly curved in lateral view, not differentiated into anterior and posterior part ( Figs 1E & F View FIGURE 1 ). Posterior side of propodeum with distinct midlongitudinal carina and vertical lateral carina ( Fig. 1F View FIGURE 1 ). Medial transverse carina interrupted by areola ( Fig. 1F View FIGURE 1 ). Propodeal areola pentagonal, slightly sculptured anteriorly ( Fig. 1F View FIGURE 1 ). Propodeal spiracles round ( Fig. 1F View FIGURE 1 ).

Wings. Fore wing: fore wing infuscated below pterostigma and near vein cu-a ( Fig. 2C View FIGURE 2 ). Pterostigma wide ( Fig. 2C View FIGURE 2 ). Vein 1SR+M connected with vein 1-M ( Fig. 2C View FIGURE 2 ). Vein M+CU distinctly curved ( Fig. 2C View FIGURE 2 ). Vein cu-a postfurcal ( Fig. 2C View FIGURE 2 ). Vein r absent ( Fig. 2C View FIGURE 2 ). Vein r-m absent ( Fig. 2C View FIGURE 2 ). Vein m-cu postfurcal ( Fig. 2C View FIGURE 2 ). Veins 2-SR and SR1 connected with pterostigma ( Fig. 2C View FIGURE 2 ). Vein 1-R1 long ( Fig. 2C View FIGURE 2 ). Veins 2-1A and CU1b absent ( Fig. 2C View FIGURE 2 ). Subdiscal cell open ( Fig. 2C View FIGURE 2 ). Hind wing: hind wing with 3 hamuli. Basal cell narrow. Vein M+CU longer than 1-M. Vein 1-1A absent.

Legs. Middle coxa with dorsal transverse groove ( Fig. 1E View FIGURE 1 ). Hind coxa smooth ( Fig. 1E View FIGURE 1 ). Hind femur and tibia distinctly flattened ( Fig. 1A View FIGURE 1 ). Hind tibial spurs long. Hind basitarsus long. Tarsal claw simple.

Metasoma. Metasoma smooth, 6-segmented ( Fig. 2B View FIGURE 2 ). Tergites 1–3 immovably joined ( Fig. 2B View FIGURE 2 ). First tergite distinctly notched antero-medially ( Fig. 2B View FIGURE 2 ). First and second metasomal suture absent ( Fig. 2B View FIGURE 2 ). Ovipositor sheath exerted, setose apically. Ovipositor without dorsal nodus and ventral serrations.

Etymology. Name formed by combining the generic name Adelius and ‘carina’, because of the midlongitudinal carina on the propodeum and the incomplete occipital carina. Gender: masculine.

Distribution. Oriental region ( India).

Comparative diagnosis. The ventrally reduced occipital carina and the midlongitudinal carina and vertical lateral carina posteriorly of the propodeum are considered to be apomorphic characters of the new genus. In addition, the new genus exhibits another peculiar character, its propodeum is not divided into anterior and posterior parts by means of a complete transverse carina which separates it from other genera. This carina may be reduced in Adelius . These characters combined separate Carinadelius from other genera within the tribe. In the keys provided by Belokobylskij (1988, 1998), He & Chen (2000), Shimbori et al. (2019) Carinadelius comes close to Adelius because of the smooth metasoma and evenly fused metasomal tergites 1–3. The combination of the smooth metasoma and absence of first and second metasomal sutures places this genus within the group containing Adelius and Myriola . The smooth marginated areas on the propodeum found in Carinadelius are different from those in Adelius + Myriola . Apart from the apomorphic characters Carinadelius exhibits some other interesting characters like absence of fore wing vein r and position of vein cu-a. Carinadelius differs from Adelius in having the unique carination of the propodeum (propodeum without midlongitudinal carina posteriorly in Adelius ), ventrally absent occipital carina which is not connected with hypostomal carina (occipital carina complete, connected with hypostomal carina in Adelius ), fore wing vein M+CU distinctly curved (more or less straight in Adelius ), vein r absent (present or absent in Adelius ).

Carinadelius is also similar to Myriola in having an undivided propodeum. However, it differs from Myriola in having the following characters: fore wing vein 1-R1 present and long (vein 1-R1 absent in Myriola ), malar space distinctly longer than basal width of mandible (distinctly shorter than basal width of mandible in Myriola ), fore wing vein r absent (present in Myriola ), fore wing infuscated (hyaline in Myriola ). The smooth metasoma in Carinadelius separates it from the genera Paradelius , Sculptomyriola and Sinadelius in which metasomal tergites 1–3 are sculptured. Even though other adeliine genera exhibit a fixed number of antennomeres (22 in Sinadelius and 20–21 in other genera), it is found that number of antennomeres is highly variable at least in the genus Adelius (E.M. Shimbori, personal communication).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Braconidae

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