Hoplopleura longula Neumann, 1909

Kozina, Paulina, Izdebska, Joanna N. & Kowalczyk, Rafal, 2021, The first description of the nymphal stages of Hoplopleura longula (Psocodea: Anoplura: Hoplopleuridae) from the harvest mouse Micromys minutus (Rodentia: Muridae), Biodiversity Data Journal 9, pp. 63747-63747 : 63747

Hoplopleura longula Neumann, 1909

Micromys minutus Type host: Micromys minutus (Pallas, 1771)

Micromys glareolus Other hosts: Micromys glareolus Schreber, 1780 in Krištofik and Lysy (1992);

Microtus arvalis Pallas, 1778 and Sorex araneus Linnaeus, 1758 in Wegner (1966b)

Materials

Type status: Other material. Occurrence : lifeStage: 1 nymph first instar; Taxon : scientificName: Hoplopleura longula Neumann , 1909; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Psocodea ; family: Hoplopleuridae ; genus: Hoplopleura ; Location : continent: Europe; country: Poland; locality: area of the Bialowieza National Park ; verbatimCoordinates: 52°45'23.3"N 23°52'23.6"E; georeferenceProtocol: GPS; Identification: identifiedBy: Kozina P.; Event: samplingProtocol: host Micromys minutus; eventDate: 20-09-1949; Record Level: institutionCode: UGDIZPMMmHHl1N 1 Type status: Other material. Occurrence : lifeStage: 1 nymph first instar and 1 nymph second instar; Taxon : scientificName: Hoplopleura longula Neumann , 1909; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Psocodea ; family: Hoplopleuridae ; genus: Hoplopleura ; Location : continent: Europe; country: Poland; locality: area of the Bialowieza National Park ; verbatimCoordinates: 52°45'23.3"N 23°52'23.6"E; georeferenceProtocol: GPS; Identification: identifiedBy: Kozina P.; Event: samplingProtocol: host Micromys minutus; eventDate: 08-12-1949; Record Level: institutionCode: UGDIZPMMmHHl2N1, UGDIZPMMmHHl1N 2 Type status: Other material. Occurrence : lifeStage: 2 nymph third instar; Taxon : scientificName: Hoplopleura longula Neumann , 1909; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Psocodea ; family: Hoplopleuridae ; genus: Hoplopleura ; Location : continent: Europe; country: Poland; locality: area of the Bialowieza National Park ; verbatimCoordinates: 52°45'23.3"N 23°52'23.6"E; georeferenceProtocol: GPS; Identification: identifiedBy: Kozina P.; Event: samplingProtocol: host Micromys minutus; eventDate: 07-10-1949; Record Level: institutionCode: UGDIZPMMmHHl1N3, UGDIZPMMmHHl2N3

Description

Nymph I (Figs 2 , 3 ). Legs large in proportion to the rest of the body, rapid growth with moulting to stage II; body length 0.53 mm (Table 2 ). Head. A poorly-marked line dividing the head and thorax. Ventral side: anterior part with the mouth rather depressed, not pronounced; convex scales around the mouth and in the site of the future gular plate; VMHS, OS and AHS present; VPHS very long, close to 75% of head length. Dorsal side: margins of the head shield poorly outlined; AHS, DAHS, PAS present; OSHS and ISHS present, very distant; ADHS and PDHS present, reaching half of the first thorax segment; a considerable number of convex, U-shaped scales. Thorax. Dorsal side: DPTS reaching anterior part of the thorax; DPtS, DMsS and DMtS shifted towards mid-portion of the body. Abdomen. Ovoid (directly after hatching: more elongated). MAS four in number; AnS present, two in number.

Nymph II (Figs 4 , 5 ). Body length: 0.78 mm (Table 2 ). Head. Wider than long; anterior part of the head shield square with smooth margins. Head well pronounced against the thorax (indentation visible at the contact point of both parts). Ventral side: large, concave scales around the mouth; head margins covered imbricately with scales (U-shaped); VMHS, OS and AHS present; VPHS constituting 50% of the head length. Dorsal side: AHS, DAHS and PAS present; ISHS and OSHS closely arranged; PCHS visible; ADHS and PDHS (reaching second segment of the abdomen) present; MHS minute. Thorax. Dorsal side: DPTS reaching beginning of the abdomen; pronounced border between the thorax, head and abdomen. Abdomen. Disproportionately large relative to the rest of the body, barrel-shaped, densely covered with U-shaped scales; traces of segmentation visible; MAS eight in number. After x-ray, structure of nymph III visible.

Nymph III (Figs 6 , 7 ). Body of an adult, in the final stages of moulting, individual visible through the cuticle; body size sometimes smaller than in nymph II; body length: 0.87 mm (Table 2 ). Head. Wider than long. Ventral side: convex scales present, yet not as large as in nymph II; poorly visible on the head margins; VMHS, OS and AHS present; VPHS constitutes 50% of head length. Dorsal side: ISHS and OSHS present, similar length as in nymph II; PDHS long, reaching second segment of the abdomen, ADHS present. Thorax. Clearly visible borders between the thorax, head and abdomen. Dorsal side: DPTS reaching third segment of the thorax. Abdomen. Ovoid, elongated; MAS eight in number. After x-ray, sometimes adult individual visible (particular the plates and posterior part of the abdomen).

Biology

The lice demonstrated topographic preferences - a tendency for congregating along the sides of the host’s body and on both sides of the head (between the ears and on the neck) (Fig. 8 )(Table 1 ).

Figures

Figure 2. Hoplopleura longula nymph I, ventral (left) and dorsal (right) view.

Figure 3. Hoplopleura longula nymph I, dorsal view.

Figure 4. Hoplopleura longula nymph II, ventral (left) and dorsal (right) view.

Figure 5. Hoplopleura longula nymph II, dorsal view.

Figure 6. Hoplopleura longula nymph III, ventral (left) and dorsal (right) view.

Figure 7. Hoplopleura longula nymph III, dorsal view.

Figure 8. Topographic preferences of all stages of Hoplopleura longula on host's body: A - dorsal and B - ventral view.