Hydropsyche asiatica Ulmer 1905

Pandher, Manpreet S., Kaur, Simarjit, Parey, Sajad H. & Saini, Malkiat S., 2017, Review of genus Hydropsyche Pictet 1834 (Insecta: Trichoptera: Hydropsychidae) from India, Zootaxa 4365 (3), pp. 331-360 : 344-349

Hydropsyche asiatica Ulmer 1905

( Figs. 64–68 )

Hydropsyche asiatica Ulmer 1905 , 91

Neotype. We designate here a neotype for Hydropsyche asiatica Ulmer 1905 . The holotype of this species was deposited in the Stettin Museum, Szczecin, Poland ( Ulmer 1905). According to Dr. Janusz Majecki (personal communication, 5 August 2017), “I received information from Mr. Kocela who works in [the] National Museum in Szczecin. According to him, [the] entire old collection of insects and other invertebrates was destroyed by burning during 50–60thies [sic], due to "infection" by some fungi and insects. Unfortunately these destroyed specimens/ species were not recorded so I am afraid that [the] holotype of Hydropsyche asiatica has disappeared irreversibly.” A second male specimen from Java mentioned by Ulmer (1905) as probably belonging to this species, described as somewhat smaller but with some “gradual” differences in the genitalia, also apparently was deposited in the Stettin Museum and is lost. No other specimens have been reported before now. The original description is ambiguous as well as incomplete, creating uncertainty about the identity of this species and its distinction from H. hamifera Ulmer 1905 and H. askalaphos Malicky and Chantaramongkol 2000 . Therefore, in compliance with the International Code of Zoological Nomenclature (1999, Article 75.1), a neotype is selected from among a series of specimens collected by the senior author from the Himalayan state of Sikkim (original type locality) and conforming with the limited details of the original description.

Redescription of adult male. Colour in alcohol dark brown with yellowish golden pubescence, dorsum of head light brown, posterior setal warts on head golden. Length from tip of head to apices of folded forewings about 12.5 mm (n = 7); maxillary palps each about 2.75 mm long; 2nd segment twice as long as 3rd segment, 5th segment about as long as 1st–4th combined; labial palps each about 1.00 mm long. Forewings each about 11.25 mm (n = 7) long (as per original description, expanded wings extending 23 mm); membranes transparent golden yellow with very fine bright reticulate pattern. Length of each hindwing 8.25 mm (n = 7).

Male genitalia ( Figs. 64–68 ): Abdominal segment IX longitudinally short; anterolateral margins convex; dorsomedian keel directed posterad, digitate in dorsal view; dorsally and laterally granulose, positioned posteriorly; anteroventral margin slightly constricted; anterodorsal margin notched in dorsal view; posterolateral lobe on each side round, posterior spine row appearing to be continuous with setal row on posterolateral slope of median keel. Depression between segment IX and tergum X almost U–shaped. Body of tergum X short longitudinally, quadrangular in lateral view, roundly quadrate in dorsal view; apicoventral setose lobes modified into two small pointed projections directed posterad in dorsal and lateral views; apicodorsal lobes each triangular in shape with rounded apices lying between apicoventral setose lobes in dorsal view, pointed apically with small setae in lateral view; dorsal interlobular gap very negligible. Inferior appendages each 2–segmented, basal segment (coxopodite) long, broad basally, slightly dilating distally from mid length in lateral view; curved mesad in ventral view. Phallic apparatus simple, convex ventrally, then concave for short distance subapically in lateral view; endotheca with pair of broad, incurved acute apices in ventral view.

Material examined: Neotype: Male. “ India: Sikkim: Arhitar Lake , 1450 m, 27°11’12”N, 88°44’34” E, 30-v- 2009, Pandher & Parey”, NZC.

Additional Material: 3 males, 1 female, collection data same as of neotype; Golitar , 2200 m, 27°10’N, 88°29’E, 25-iv-2009, 2 males, Pandher & Parey, NZC; Mangan, 1100 m, 27°29’52”N, 88°32’52”E, 12-v-2009, 4 males, 2 females, Pandher & Parey, NZC . Uttarakhand: Diwalikhal , 2100 m, 30°6’2”N, 79°1’7”E, 10-vi-2009, 1 male, Pandher & Parey, NZC; Karanparyag, 900 m, 20-vi-2008, 1 male, Pandher & Parey, NZC; Mori, 1250 m, 29- ix-2008, 3 males, Pandher & Parey, NZC. Jammu & Kashmir; Pahalgam, 2100 m, 15-viii-2009, 6 males, 2 females,Pandher & Parey, NZC (all in alcohol).

Distribution: India: Sikkim, Uttarakhand, West Bengal. Nepal.

MAP.

Diagnosis: This species belongs to the Hydropsyche asiatica Group. Hydropsyche asiatica is closely similar to H. hamifera Ulmer 1905 as per the original description. Its male genitalia are similar to those of other species of this group based on characteristics cited by different workers ( Malicky and Chantaramongkol 2000 and Oláh and Johanson, 2008), but forewings of this species are very different from those of other species in the group, being transparent, deep yellow (yellowish brown or slightly fuscous in other species of this group) and with very fine bright spots or maculations. The male genitalia of this species are very similar to those of H. askalaphos Malicky and Chantaramongkol 2000 , reported from Thailand, in the shape of male genitalia in dorsal view, but the median keel is much broader, the apicoventral setose lobes are more rounded and better defined, and the depression of segment IX–tergum X is very small in lateral view in H. askalaphos , whereas the median keel is digitate in dorsal view, the apicoventral setose lobes are represented by very small pointed projections, and the depression between segment IX and tergum X is wide and U-shaped in lateral view in H. asiatica .

Figures

FIGURES 64–68. Hydropsyche spp., male genitalia. 64–68, H. asiatica Ulmer: 64, left lateral; 65, dorsal; 66, right inferior appendage, ventral; 67, phallus, left lateral; 68, phallus, ventral.