Diversification deep in the heart of Texas: seven new grasshopper species and establishment of the Melanoplus discolor species group (Orthoptera, Acrididae, Melanoplinae) Author Hill, JoVonn G. https://orcid.org/0000-0002-1892-7117 Mississippi Entomological Museum, Department of Molecular Biology, Biochemistry, Entomology, and Plant Pathology, Mississippi State University, Mississippi, USA jgh4@msstate.edu text ZooKeys 2023 2023-06-01 1165 101 136 http://dx.doi.org/10.3897/zookeys.1165.104047 journal article http://dx.doi.org/10.3897/zookeys.1165.104047 1313-2970-1165-101 0F260E39BDA6424385ABBCBF6D8F8D0D 4A5353677A5E5B5497EE0534F28A28A3 Melanoplus susdentatus sp. nov. Figs 2F , 3F , 4F , 9A-J , 14 , 18 Type material. Holotype : 1♂, USA, TX, Comal Co. 3.8 mi NW FIsher, 30.0051 , -98.3190 , 16 July 2020, J.G. Hill; Ashe juniper savanna. Deposited in the Mississippi Entomological Museum. Other specimens examined. Texas: Comal Co., 6.6 mi E Bulverde , 29.8283 , -98.3127 , 26 August 2022 , J.G. Hill ( 3♂ , 1♀ ) ; 3.8 mi Fisher , 30.0051 , -98.3190 , 16 July 2020 , J.G. Hill ( 2♂ ) . Hayes Co., 6.7 mi NE Dripping Springs , 30.269 , -98.1506 , 28 August 2022 , J.G. Hill , J.R. Fisher ( 3♂ , 1♀ ) ; 3.96 mi SW Pioneer Town , 29.9591 , -98.1662 , 2 August 2021 , J.G. Hill ( 1♂ ) ; 2.4 mi N Woodcreek , 30.0635 , -98.1063 , 23 July 2021 , J.G. Hill ( 1♂ ) ; 2 mi S Wimberly , 5 August 1953 , N.W. Wasseman ( 1♂ ) ; 4.5 mi N Wimberly , 30.0635 , -98.1061 , J.G. Hill ( 5♂ , 2♀ ) . Travis Co., 4.12 mi W Bee Cave , 30.2945 , -98.0182 , 29 August 2022 , J.G. Hill , J.R. Fisher ( 4♂ , 1♀ ) . Diagnosis. Male cerci that are broadly falcate (Figs 2F , 9A, B ), and the internal male genitalia with the aedeagal sheath that does not project to the distal edge dorsal valves. Dorsal valves are thin plates that are arched along the caudal margin and are produced laterally to the ventral valves, giving the aedeagus a narrow or thin appearance in caudal or dorsal views (Figs 3F , 4F ). The ventral valves are slightly shorter than the dorsal valves (Fig. 9F ). Most similar to M. kendalli and M. balcones . Melanoplus susdentatus is easily separated from M. kendalli by having an aedeagal sheath that does not reach the distal margin of the dorsal valves and the curved nature of the dorsal valves (Figs 8C-G , 9C-G ), and from M. balcones by the shorter, rounded valves found in that species (Fig. 9D, F ). Figure 8. Melanoplus susdentatus sp. nov. A dorsal view of male terminalia B lateral view of male terminalia C dorsal view of phallic complex D lateral view of phallic complex E dorsal view of aedeagus F lateral view of aedeagus G caudal view of the aedeagus H dorsal view of epiphallus I caudal view of epiphallus J habitus. Figure 9. Melanoplus balcones sp. nov. A dorsal view of male terminalia B lateral view of male terminalia C dorsal view of phallic complex D lateral view of phallic complex E dorsal view of aedeagus F lateral view of aedeagus G caudal view of the aedeagus H dorsal view of epiphallus I caudal view of epiphallus J habitus. Measurements. Male measurements. (mm): ( n = 10) Body length 17.5-21.5 (mean = 19.6); pronotum length 3.5-4.7 (mean = 4.1); tegmen length 4.1-5.1 (mean = 4.5); hind femur length 9.6-11.5 (mean = 10.6); cerci length 0.8-1.0 (mean = 1.0); basal width of cercus 0.5-0.6 (mean = 0.6); mid-cercal width 0.4-0.5 (mean = 0.5); cerci apex width 0.2-0.3 (mean = 0.3). Female measurements. (mm): ( n = 4) Body length 18.5-21.1 (mean = 19.9); pronotum length 4.2-4.7 (mean = 4.5); tegmen length 4.1-5.9 (mean = 5.0); hind femur length 10.7-12.3 (mean = 11.7) Dorsal ovipositor valve length 1.2-1.3 (mean = 1.3); ventral ovipositor valve length 1.0 (mean = 1.0). Habitat. Ashe Juniper savanna (Fig. 18A ). Etymology. From the Latin sus for hog and dentatus for toothed. In reference to the dorsal valves being shaped like the distal ends of the incisors and tusk of Sus scrofa L., a notorious invasive species in Texas. Suggested common name. Hog-toothed pouncer.