Desmopachria hardyae 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 : 104

Desmopachria hardyae Miller and Wolfe , new species

Zoobank.org/ urn:lsid:zoobank.org:act:8B9088E7-DBA3-4710-A3DC-C2568B7EC5FF ( Figs. 15–17 , 70 )

Type Locality. Guyana, Region IX, Katu Wao River nr. Kusad Mts, large vegetated marsh, 2°49.793ʹ N, 59°48.361ʹ W .

Diagnosis. This species differs from all others in the species-group in the shape of the male genitalia. The median lobe in lateral aspect is broad with the apex a narrow, elongate, apically narrowly rounded lobe ( Fig. 15 ). In ventral aspect, the lobe is very broad medially, thereafter narrowed to a narrow, apically pointed apex ( Fig. 16 ). The lateral lobes are unique in the species-group, with the dorsal ramus apically narrow in both lateral and ventral aspects ( Figs. 16, 17 ), and the ventral ramus apically rounded in both ventral and dorsal aspects ( Figs. 16, 17 ). Specimens are pale with the head and pronotum evenly yellow and the elytra evenly pale brown to orange.

Description. Measurements: TL = 1.4 mm, GW = 0.9–1.0 mm, HW = 0.5–0.6 mm, EW = 0.2 mm, TL/GW = 1.5, HW/EW = 2.2. Coloration: Head and pronotum evenly yellow. Elytron pale brown to orange. Head appendages, legs, and ventral surfaces yellow to yellow-orange, darker on surface of metacoxa and abdomen. Male genitalia: Male median lobe in lateral aspect short and broad, ventrally broadly rounded, apex constricted to an elongate, apically narrowly rounded lobe ( Fig. 15 ). Median lobe in ventral aspect broad, medially constricted, apically narrowly constricted, apex terminating in 2 short, spinous processes ( Fig. 16 ). Lateral lobe in lateral aspect basally broad, apically with 2 long rami, ventral ramus apically broadly rounded, dorsal ramus slender, apically narrowly rounded ( Fig. 17 ); in ventral aspect slender, sinuate, apices of rami rounded ( Fig. 16 ).

Variation. There is very little variation in color across the specimens examined.

Etymology. This species is named hardyae in honor of Dr. Susanne H. Hardy, DO.

Distribution. This species is known from several lowland localities in Venezuela and southwestern Guyana ( Fig. 70 ).

Habitat. Specimens were collected from a “large vegetated marsh,” “margins of vegetated creek,” “margins of vegetated pond,” “muddy margins of vegetated farm ponds,” “marshy area,” “large side pools of large river,” “sandy side-pool in floodplain,” “marsh,” “muddy creek,” and “pools along road.”

Type Material. Holotype in CSBD, male labeled, “ GUYANA: Region IX 2°53.412ʹN, 59°51.042ʹW, 114m Katu Wao River nr. Kusad Mts. Margins of vegetated creek leg. Short, Isaacs, Salisbury 26.x.2013; GY13-1026-01A/ SEMC1237013 KUNHM-ENT [label with barcode]/ HOLOTYPE Desmopachria hardyae Miller and Wolfe, 2017 [red label with black line border].” Paratypes: Twenty-two labeled same as holotype except with different specimen barcode labels and each with “… PARATYPE Desmopachria hardyae Miller and Wolfe, 2017 [blue label with black line border];” 11 labeled “ GUYANA: Region IX 2°61.193ʹN, 59°55.336ʹW, 117m nr. Kusad Mts., muddy margins of vegetated farm ponds leg. A. Short 28.x.2013 GY13-1028-02A/…” and barcode and paratype labels; four labeled “VENZUELA: Barinas State 8°16.954ʹW, 70°23.867ʹW, 149m 20km S. Cidudad Boliva; 26.i.2012 leg. Short, Arias,, & Gustafson Muddy creek ; VZ12-0125- 01A/…” and barcode and paratype labels; 53 labeled “VENEUZUELA: Barinas State 8°19.394ʹN, 70°28.238ʹW, 173m ca. 13 km SE Ciudad Bolivia leg. Short, Arias, & Gustafson marsh; 25.i.2012; VZ12-0125-02A/…” and barcode and paratype labels; 15 labeled “ VENEZUELA: Monagas State 9°05.785ʹN; 62°43.818ʹW, 29 m between Morichal Largo & Tembledor; 2.ii.2010; leg, Short, Garci, & Joly; margins of vegetated pond; VZ10-0202-03A/…” and barcode and paratype labels. Specimen catalog numbers are in Table 1 .

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.