Desmopachria delongi 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 : 101

Desmopachria delongi Miller and Wolfe , new species

Zoobank.org/ urn:lsid:zoobank.org:act:C6FC03C3-4C59-4760-B207-A9A3E472BC4C ( Figs. 5–8 , 69 )

Type Locality. Suriname, Sipaliwini, Raleighvallen Nature Reserve, Voltzberg trail, detrital pools along stream, 4°40.910ʹ N, 56°11.138ʹ W .

Diagnosis. This species has male genitalia moderately modified with the median lobe in lateral aspect short and evenly curved ( Fig. 5 ). In ventral aspect, the median lobe is moderately broad medially, apically abruptly narrowed, and apically narrowly bispinous ( Fig. 6 ). The lateral lobe is bifid with each ramus relatively elongate, the dorsal one apically rounded, the ventral one apically curved and pointed ( Figs. 7, 8 ). Specimens are pale with the head and pronotum evenly yellow-orange and the elytra evenly brown. The short, stout median lobe with the lateral margins sinuate and apically convergent to a bispinous apex ( Fig. 6 ) is unique in the D. nitida species-group.

Description. Measurements: TL = 1.4–1.5 mm, GW = 0.9–1.0 mm, HW = 0.5 mm, EW = 0.3 mm, TL/GW = 1.5, HW/EW = 1.8–1.9. Coloration: Head and pronotum evenly yellow-orange. Elytron evenly brown. Ventral surfaces and appendages orange. Male genitalia: Male median lobe in lateral aspect short, moderately broad basally, apically narrow, curved and apically narrowly rounded ( Fig. 5 ). Median lobe in ventral aspect broad basally, lateral margins convergent apically, broadly sinuate, apically abruptly constricted to sharply bifid apex ( Fig. 6 ). Lateral lobe in lateral aspect very large, broad basally, curved apically, terminating in 2 long lobes, ventral lobe somewhat sinuate, apically pointed and setose, dorsal lobe narrow basally, apically slightly expanded with apex rounded ( Figs. 7, 8 ).

Variation. No noticeable variation was detected.

Etymology. This species is named delongi in honor of Dr. Mahlon R. DeLong, MD.

Distribution. This species is only known from the type locality in Suriname ( Fig. 69 ).

Habitat. Specimens were collected from “detrital pools along stream” and “margin of stream.”

Type Material. Holotype in NZCS, male labeled, “ SURINAME: Sipaliwini District 04°40.910ʹN, 56°11.138ʹW, 78 m Raleighfallen nature Reserve Voltzberg trail; detrital pools along stream; leg. A. Short, C. McIntosh 30.vii.2012; SR12-0730-01B/ SEMC1113593 KUNHM-ENT [label with barcode]/ HOLOTYPE Desmopachria delongi Miller and Wolfe, 2017 [red label with black line border].” Paratypes: Five labeled same as holotype except with different specimen barcode labels and each with “… PARATYPE Desmopachria delongi Miller and Wolfe, 2017 [blue label with black line border].” 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.