Desmopachria kemptonae Miller and Wolfe, 2018

Miller, Kelly B. & Wolfe, G. William, 2018, Nine New Species in the Desmopachria nitida Species-Group of the Neotropical Genus Desmopachria Babington, 1841 (Coleoptera: Adephaga: Dytiscidae: Hydroporinae: Hyphydrini), The Coleopterists Bulletin 72 (1), pp. 97-112 : 105

Desmopachria kemptonae Miller and Wolfe , new species

Zoobank.org/ urn:lsid:zoobank.org:act:EBFEE7D5-D0F1-4F04-A3E4-7FC68A6C557C ( Figs. 18–21 , 69 )

Type Locality. Venezuela, Barinas State, ca. 13 km SE Ciudad Bolivia, 8°19.394ʹ N, 70°28.238ʹ W, 173 m.

Diagnosis. Only male genitalic differences characterize members of this species. The median lobe in lateral aspect is straight to the apex, which is elongate and sharply pointed ( Fig. 18 ). In ventral aspect, the median lobe is very broad basally, then abruptly constricted and apically narrowed to the sharply bifid apex ( Fig. 19 ). The lateral lobe is also uniquely shaped with the dorsal ramus elongate, expanded medially and sharply pointed, and the ventral ramus is transversely broad and apically broadly rounded ( Figs. 20, 21 ). Specimens are pale yellow with the head and pronotum evenly yellow and the elytron evenly light brown. The broad male median lobe that is apically strongly narrowed to a narrowly bispinous apex is somewhat similar to Demopachria nitidoides Young and D. margarita , but D. kemptonae has the median lobe straight in lateral aspect ( Fig. 18 ), the ventral ramus of the lateral lobe broadly lobate, and the dorsal ramus pointed and curved mediad in ventral aspect ( Figs. 20, 21 ).

Description. Measurements: TL = 1.3–1.4 mm, GW = 1.0 mm, HW = 0.5 mm, EW = 0.2–0.3 mm, TL/GW = 1.4, HW/EW = 2.0–2.1. Coloration: Head and pronotum evenly yellow. Elytron evenly light brown. Head appendages, legs, and ventral surfaces uniformly orange. Male genitalia: Male median lobe in lateral aspect broad basally, apical portion slender, straight, evenly tapered to sharp point ( Fig. 18 ). Median lobe in ventral aspect very broad basally, abruptly narrowed medially, thereafter evenly tapered to sharply bifid apex ( Fig. 19 ). Lateral lobe in lateral aspect broad basally, apically deeply bifid, ventral lobe short, apically rounded, dorsal lobe curved and apically sharply pointed ( Figs 20 ); in ventral aspect moderately broad, apex of ventral ramus broad, apically broadly rounded, apex of dorsal ramus slightly curved mediad, narrowly rounded ( Fig. 21 ).

Variation. Specimens vary in the intensity of coloration of the dorsal surfaces, possibly because some are more teneral than others.

Etymology. This species is named kemptonae in honor of Dr. Christine Kempton, MD.

Distribution. This species is known from a few localities in Venezuela ( Fig. 69 ).

Habitat. According to label data, specimens were collected from a “large lagoon” and a “marsh.”

Type Material. Holotype in MIZA, male labeled, “ VENEZUELA: Barinas State 8°19.394ʹN, 70°28.238ʹW 173m ca. 13 km SE Ciudad olivai leg. Short, Arias, & Gustafson marsh; 25.i.2012: VZ12-0125-02A/ SEMC1030673 KUNHM-ENT [barcode on label]/ HOLOTYPE Desmopachria kemptonae Miller and Wolfe, 2017 [red label with black line border].” Paratypes: Thirteen labeled same as holotype except with different specimen barcode labels and each with “… PARATYPE Desmopachria kemptonae Miller and Wolfe, 2017 [blue label with black line border];” 10 labeled, “VENEZUALA: Guárico State 8°31.705ʹN, 66°22.602ʹW, 145m c. 65 km S. Las Mercedes 9.i.2009; leg. Short, Miller Garc´ıa & Camacho; large lagoon w/ veg.; VZ09-0109-01X” with various KUNHM-ENT barcode labels (see Table 1) and paratype label as above; two labeled, “ VENEZUELA: Bol´ıvar State 07°53.220ʹN, 62°10.239ʹW, 245 m 30 km S. Upata; 12.vii.2010 leg. Short, Tellez, & Camacho roadside marsh; VZ10-0712-01A/…” and barcode labels SEMC0909338 and SEMC0909345 and paratype label as above .

Figures

Figs. 1–32. Male genitalia of Desmopachria species in the D. nitida species-group. D. curseenae: Median lobe – 1) Right lateral aspect; 2) Ventral aspect; Right lateral lobe – 3) Right lateral aspect; 4) Ventral aspect. D. delongi: Median lobe – 5) Right lateral aspect; 6) Ventral aspect; Right lateral lobe – 7) Right lateral aspect; 8) Ventral aspect. D. gingerae: Median lobe – 9) Right lateral aspect; 10) Ventral aspect; 11) Right lateral lobe, right lateral aspect. D. gyrationi: Median lobe – 12) Right lateral aspect; 13) Ventral aspect; 14) Right lateral lobe, right lateral aspect. D. hardyae: Median lobe – 15) Right lateral aspect; 16) Ventral aspect; 17) Right lateral lobe, right lateral aspect. D. kemptonae: Median lobe – 18) Right lateral aspect; 19) Ventral aspect; Right lateral lobe – 20) Right lateral aspect; 21) Ventral aspect. D. lloydi: 22) Median lobe, ventral aspect; 23) Apices of median lobe, anterior aspect; Right lateral lobe – 24) Right lateral aspect; 25) Ventral aspect. D. singhae: Median lobe – 26) Right lateral aspect; 27) Ventral aspect; 28) Right lateral lobe, right lateral aspect. D. vohrae: Median lobe – 29) Right lateral aspect; 30) Ventral aspect; Right lateral lobe – 31) Right lateral aspect; 32) Ventral aspect.

Figs. 69–70. Distribution of Desmopachria species in the D. nitida species-group. 69) D. delongi, D. gyrationi, and D. kemptonae; 70) D. gingerae and D. hardyae.