Dvivarnus

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This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions. If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale): Talamas E, Mikó I, Copeland R (2016) Revision of Dvivarnus (Scelionidae, Teleasinae). Journal of Hymenoptera Research (49) : 1–23, doi. Versioned wiki page: 2016-04-28, version 97028, https://species-id.net/w/index.php?title=Dvivarnus&oldid=97028 , contributors (alphabetical order): Pensoft Publishers. Citation formats to copy and paste BibTeX: @article{Talamas2016JournalofHymenopteraResearch, author = {Talamas, Elijah J. AND Mikó, István AND Copeland, Robert S.}, journal = {Journal of Hymenoptera Research}, publisher = {Pensoft Publishers}, title = {Revision of Dvivarnus (Scelionidae, Teleasinae)}, year = {2016}, volume = {}, issue = {49}, pages = {1--23}, doi = {10.3897/JHR.49.7714}, url = {http://jhr.pensoft.net/articles.php?id=7714}, note = {Versioned wiki page: 2016-04-28, version 97028, https://species-id.net/w/index.php?title=Dvivarnus&oldid=97028 , contributors (alphabetical order): Pensoft Publishers.} } RIS/ Endnote: TY - JOUR T1 - Revision of Dvivarnus (Scelionidae, Teleasinae) A1 - Talamas E A1 - Mikó I A1 - Copeland R Y1 - 2016 JF - Journal of Hymenoptera Research JA - VL - IS - 49 UR - http://dx.doi.org/10.3897/JHR.49.7714 SP - 1 EP - 23 PB - Pensoft Publishers M1 - Versioned wiki page: 2016-04-28, version 97028, https://species-id.net/w/index.php?title=Dvivarnus&oldid=97028 , contributors (alphabetical order): Pensoft Publishers. M3 - doi:10.3897/JHR.49.7714 Wikipedia/ Citizendium: <ref name="Talamas2016Journal of Hymenoptera Research">{{Citation | author = Talamas E, Mikó I, Copeland R | title = Revision of Dvivarnus (Scelionidae, Teleasinae) | journal = Journal of Hymenoptera Research | year = 2016 | volume = | issue = 49 | pages = 1--23 | pmid = | publisher = Pensoft Publishers | doi = 10.3897/JHR.49.7714 | url = http://jhr.pensoft.net/articles.php?id=7714 | pmc = | accessdate = 2024-12-13 }} Versioned wiki page: 2016-04-28, version 97028, https://species-id.net/w/index.php?title=Dvivarnus&oldid=97028 , contributors (alphabetical order): Pensoft Publishers.</ref> See also the citation download page at the journal.

Taxonavigation

Ordo: Hymenoptera
Familia: Scelionidae

Name

Dvivarnus Rajmohana & Veenakumari – Wikispecies link – Pensoft Profile

• Dvivarnus Rajmohana & Veenakumari, 2011: 40 (original description. Type: Dvivarnus punctatus Rajmohana & Veenakumari, by monotypy. Diagnosis, keyed).

Description

Number of basiconic sensilla on A7: 0. Number of basiconic sensilla on A8: 2. Color of radicle: yellow. Length of radicle: shorter than apical width of clypeus. Length of A3: as long as pedicel or longer. Number of basiconic sensilla on A12: 1. Number of mandibular teeth: 3. Mandibular teeth: ventral tooth the longest. Facial striae: present. Dorsal limit of facial striae: facial striae exceeding horizontal plane at margin of anterior ocellus. Torular triangle: present. Height of torular triangle: less than height of clypeus. Central keel: present. Surface of dorsal frons in dorsal view: convex. Orbital carina: present. Genal patch: absent. Vertex patch: absent. Hyperoccipital carina: absent. Anterior margin of occipital carina dorsally: crenulate. Pronotal cervical sulcus: present. Sculpture of pronotal cervical sulcus: shallowly foveolate. Pronotal suprahumeral sulcus: present. Sculpture of pronotal suprahumeral sulcus: foveolate. Proximity of suprahumeral and pronotal cervical sulci: pronotal suprahumeral sulcus terminating before reaching pronotal cervical sulcus. Posterior pronotal sulcus: absent. Sculpture of propleural epicoxal sulcus: foveolate. Sculpture of posterior scutellar sulcus: foveolate. Sculpture of mesoscutal suprahumeral sulcus: foveolate. Length of mesoscutal suprahumeral sulcus: less than one half length the distance from the tegula to the anterior apex of mesoscutum. Sculpture of mesoscutal humeral sulcus: foveolate. Lateral scutoscutellar sulcus: reaching transaxillar carina. Transaxillar carina: present. Setae on lateral margin of mesoscutellum: present. Posterior scutellar sulcus: present. Acropleural sulcus: present. Length of acropleural sulcus: elongate. Subalar pit: present. Course of prespecular sulcus and mesepimeral sulcus: not continuous dorsally. Mesopleural pit: present. Sculpture of femoral depression: transversely rugose. Mesopleural carina: present. Proximity of ventral apex of mesopleural carina and ventral mesopleural carina: carinae adjacent. Sculpture of mesopleural epicoxal sulcus: foveolate. Sculpture of postacetabular sulcus: foveolate. Sculpture of mesopleuron below femoral depression: areolate rugose. Episternal foveae: indistinguishable from surface sculpture. Sculpture of mesepimeral sulcus: foveolate. Metascutellar spine: present. Shape of metascutellar spine in dorsal view: pointed. Length of metascutellar spine: longer than proximal striated region of metascutellum. Apical semitransparent lamella on metascutellar spine: absent. Sculpture of metascutellum: longitudinally striate throughout. Proximal striation of metascutellum: extending onto surface of metanotal spine.Setation of central propodeal area: present. Posterior propodeal projection: present. Metapleural sulcus: present. Setation of metapleuron: Area delimited posteriorly by paracoxal and vertical part of metapleural sulcus is covered with dense setae, remainder of metapleuron glabrous. Sculpture of paracoxal sulcus: foveolate. Dorsal margin of T1 in lateral view: concave. Length of pits on anterior T1: almost reaching posterior margin of tergite. Transverse line of pits on anterior T1: present. Transverse line of pits on anterior T2: present. Lateral patch on T2: present. Transverse line of pits on anterior T3: absent. Width of T3: as wide or slightly wider than mesoscutum. Sculpture of T3: punctate. Length of apical setae on T3: not longer than non-apical setae. Posterolateral patch on T3: present. Lateral patch on T4: present. Lateral patch on T6: present. Transverse line of pits on anterior S2: present. Felt field on S2: present. Transverse line of pits on anterior S3: absent.

Diagnosis

Per the characters presented by Veenakumari et al (2011), Dvivarnus can be differentiated from other teleasines by the combination of the dense punctation found throughout T3 and S3, the presence of paired mesoscutellar spines, the absence of lateral propodeal carina and the presence of an inverted U-shaped carina dorsally surrounding the metasomal depression. Punctation on T3 can be found in some species of Trimorus (Fig. 20), but the punctation is surrounded by rugulae of varying intensity. In Dvivarnus, the punctation is uniform throughout most of the tergite and is not accompanied by additional sculptural elements. Specimen USNMENT01109195 (Fig. 20) also has spines derived from the metapleural carina, which are not present in Dvivarnus. Additional characters for the identification of Dvivarnus are presented in the key to teleasines with mesoscutellar spines.

Comments

The species of Dvivarnus are extremely similar in most pleural characters and differ primarily by features of the head, pronotum, and metasoma. Sexual dimorphism is exhibited mostly in the pattern of setation and striation of the frons. In males, the glabrous area above the interantennal process is less distinct and the density of setation throughout the frons varies greatly. The facial striae in males extend dorsally throughout the frons whereas in females the striation is absent from the center portion of the frons.
We examined two morphospecies of males that we were unable to unambiguously associate with the female of Dvivarnus elektrolythron. One morphospecies (USNMENT01109164, Figs 46–50) shares with Dvivarnus elektrolythron the pattern of striation on the lateral pronotum (Fig. 50) and the longitudinal furrow on the metanotal trough (Fig. 48). However, it has distinct notauli (Fig. 46) and Dvivarnus elektrolythron has none, and the posterior margin of the mesoscutellum between the mesoscutellar spines is concave in USNMENT01109164, and medially pointed in Dvivarnus elektrolythron. The other morphospecies (USNMENT01109212, Figs 40–45) has the opposite arrangement of characters: it shares with Dvivarnus elektrolythron the absence of notauli and the presence of a pointed posterior margin of the mesoscutellum (Figs 40, 43) but it has a foveolate metanotal trough (Fig. 43) and the lateral pronotum is predominantly smooth (Fig. 45). In the absence of additional specimens that would allow us to thoroughly assess intraspecific variability in males, or molecular or biological data, we consider it best to document the morphology of these males and present them as undetermined at the species-level.

Key to teleasines with mesoscutellar spines

Key to teleasines with mesoscutellar spines — E. Talamas , I. Mikó , R. Copeland

1		Radicle shorter than distal width of clypeus (Figs 15–19); lateral propodeal carina absent (Figs 36, 43, 48); metasomal depression surrounded dorsally by an inverted U-shaped carina (Figs 48, 43, 36); T3 and S3 densely punctate (Figs 21–23, 25, 29); metascutellar spine longitudinally striate throughout (Figs 5–6, 31, 36–37; T3 with lateral patch (Figs 21–23)     Dvivarnus
–		Radicle as long as distal width of clypeus (Figs 1–2); lateral propodeal carina present (Figs 9–10); metasomal depression not surrounded dorsally by continuous carina (Figs 9–10); T3 and S3 not densely punctate (Figs 12, 14, 24), or punctation with interstitial rugulae (Fig. 20); metascutellar spine smooth in distal half (Figs 7–8); T3 without lateral patch (Figs 12, 14, 24)    2
2		Metasomal depression without marginal setae (Figs 8, 10); netrion sulcus distinct (Fig. 4); apex of metascutellar spine unbranched (Figs 8, 14)     Gryonoides
–		Metasomal depression with marginal setae (Figs 7, 9); netrion sulcus not visible in lateral view (Fig. 3); metascutellar spine with bifurcate apex     Trimorus carus species group

Key to species Dvivarnus (females)

Key to species Dvivarnus (females) — E. Talamas , I. Mikó , R. Copeland

1		Frons with central keel separate from carinae of torular triangle (Fig. 15); mesoscutellum with posterior margin between mesoscutellar spines medially convex in dorsal view (Fig. 28, 31); pronotum with posterior portion transversely striate (Fig. 30); lateral patch on T4 present as a dense tuft of setae (Fig. 22); T5 with lateral patch present (Fig. 22)     Dvivarnus elektrolythron Talamas & Mikó, sp. n.
–		Frons with central keel extending to torular triangle (Figs 16–18); mesoscutellum with posterior margin concave between mesoscutellar spines in dorsal view (Figs 26, 33, 36); pronotum with posterior portion predominantly smooth (Figs 25, 32, 34–35); lateral patch on T4 broad (Figs 39, 21, 23) ; T5 without lateral patch (Figs 21, 23)    2
2		Torular triangle setose (Figs 16–17); sulcus in metanotal trough foveolate (Fig. 5); lateral face of pronotum with epomial carina (Fig. 25)     Dvivarnus agamades (Kozlov & Lê)
–		Torular triangle without setation (Fig. 18); sulcus in metanotal trough present as an elongate furrow (Figs 6, 36–37); lateral face of pronotum without epomial carina (Fig. 34)     Dvivarnus mikuki Talamas & Mikó, sp. n.

Taxon Treatment

• Talamas, E; Mikó, I; Copeland, R; 2016: Revision of Dvivarnus (Scelionidae, Teleasinae) Journal of Hymenoptera Research, (49): 1-23. doi

Images

Figure 1–4. 1 Trimorus sp., female (OSUC 186090), head, anterior view 2 Gryonoides pulchellus Dodd, female (USNMENT00872146), head, anterior view 3 Trimorus sp., female (OSUC 192417), pronotum, anterolateral view 4 Gryonoides glabriceps Dodd, female (USNMENT00872142), pronotum, anterolateral view. Scale bars in millimeters.  Figure 5–10. 5 Dvivarnus agamades, female (USNMENT01109190), mesosoma, posterolateral view 6 Dvivarnus mikuki, female (USNMENT01109213), mesosoma, posterolateral view 7 Trimorus sp., female (OSUC 186090), posterior mesosoma, dorsolateral view 8 Gryonoides glabriceps Dodd, female (USNMENT00872142), posterior mesosoma, dorsolateral view, anterolateral view 9 Trimorus sp., female (OSUC 1924417), mesosoma, posterior view 10 Gryonoides glabriceps Dodd, female (USNMENT00872142), mesosoma, posterior view. Scale bars in millimeters.  Figure 11–12. 11 Trimorus sp., female (OSUC 186090) head, mesosoma, metasoma, lateral view 12 Trimorus sp., male (OSUC 345677), head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.  Figure 13–14. Gryonoides glabriceps, female (USNMENT00872142), 13 head, mesosoma, metasoma, lateral view 14 head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.  Figure 15–19. 15 Dvivarnus elektrolythron, female holotype (USNMENT01109168), head and antennae, anterior view 16 Dvivarnus agamades, female (USNMENT01109190), head, anterior view 17 Dvivarnus agamades, male (USNMENT01109177), head, anterior view 18 Dvivarnus mikuki, female paratype (USNMENT01109214), head and antenna, anterior view 19 Dvivarnus mikuki, male (USNMENT01109158), head, anterior view. Scale bars in millimeters.  Figure 20–24. 20 Trimorus sp., female (USNMENT01109195), head, mesosoma, metasoma, dorsal view 21 Dvivarnus mikuki, female (USNMENT01109213), metasoma, dorsolateral view 22 Dvivarnus elektrolythron, female (USNMENT01109168), metasoma, dorsolateral view 23 Dvivarnus agamades, female (USNMENT01109174), metasoma, dorsolateral view 24 Trimorus sp., female (OSUC 186090), metasoma, posterodorsal view. Scale bars in millimeters.  Figure 25–26. Dvivarnus agamades. 25 female (USNMENT01109183), head, mesosoma, metasoma, lateral view 26 female (USNMENT01109174), head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.  Figure 28–31. Dvivarnus elektrolythron, female holotype (USNMENT0109168) 28 head, mesosoma, metasoma, dorsal view 29 metasoma, dorsal view 30 pronotum, anterolateral view 31 posterior mesosoma, dorsal view. Scale bars in millimeters.  Figure 32–33. Dvivarnus mikuki. 32 female holotype (USNMENT01059120), head, mesosoma, metasoma, lateral view 33 female paratype (USNMENT01059121), head, mesosoma, metasoma, dorsal view. Scale bars in millimeters.  Figure 34–39. Dvivarnus mikuki, female paratype (USNMENT010591135) 34 mesosoma, anterolateral view 35 posterior pronotum, lateral view 36 mesosoma, posterior view 37 posterior mesosoma, posterolateral view 38 metasoma, dorsolateral view 39 T3–T5, dorsolateral view. Scale bars in millimeters.  Figure 40–45. Dvivarnus sp., male (USNMENT01109212). 40 head and mesosoma, dorsal view 41 metasoma, dorsal view 42 head and mesosoma, lateral view 43 mesosoma, posterodorsal view 44 head, anterior view 45 pronotum, anterolateral view Scale bars in millimeters.  Figure 46–50. Dvivarnus sp., male (USNMENT01109164) 46 head, mesosoma metasoma, dorsal view 47 head and mesosoma, lateral view 48 mesosoma, posterolateral view 49 head, anterior view 50 pronotum, anterolateral view. Scale bars in millimeters.