Copelatus nakamurai Guéorguiev, 1970

Alarie, Yves, Michat, Mariano C., Watanabe, Kohei, Shaverdo, Helena, Wang, Liang-Jong & Watts, Chris H. S., 2022, An outlook on larval morphology of Copelatinae diving beetles with phylogenetic considerations (Coleoptera: Adephaga, Dytiscidae), Zootaxa 5175 (2), pp. 151-205 : 175

publication ID

https://doi.org/ 10.11646/zootaxa.5175.2.1

publication LSID

lsid:zoobank.org:pub:C4601ABE-4C6F-48BA-BA24-3339A44DC15C

DOI

https://doi.org/10.5281/zenodo.7003370

persistent identifier

https://treatment.plazi.org/id/3B0087B3-145A-FF9E-FF3A-FF0CFEDD4344

treatment provided by

Plazi

scientific name

Copelatus nakamurai Guéorguiev, 1970
status

 

Copelatus nakamurai Guéorguiev, 1970 View in CoL

Source of material. The two instar II and five instar III larvae studied were reared ex ovo from adults collected at the following locality: Japan. Kasamatshu-cho, Mudoji , Gifu Prefecture, 4.V.2018. Y. Yoshimura, leg.

Diagnosis (instar III). The third instar of Copelatus nakamurai can easily be distinguished from that of the other species studied in this paper by the following combination of characters: HL = 0.80 mm; L3 <2.00 mm; U <0.40 mm; head capsule subquadrate, strongly constricted at level of occipital region ( Fig. 28 View FIGURES 28–29 ), scale-like sculpticels lacking over frontoclypeus, present over parietale; anterior margin of frontoclypeus narrowly convex, extending mesally well beyond adnasalia ( Fig. 28 View FIGURES 28–29 ); adnasalia margined with elongate acute teeth ( Fig. 64 View FIGURE 64 ); MP2/MP1> 1.50; GA/MP1> 1.50; 1.30 <LP2/LP1 <1.90; inner margin of stipes lacking a dorsal linear row of spinulae; profemur with less than 3 PV and 4 AV secondary setae; metafemur with less than 3 AV secondary setae; urogomphus composed of one urogomphomere; U/HW <0.40; U/LAS <0.50; Palaearctic.

Description, instar II

Body: Measurements and ratios aimed to characterize body shape are shown in Table 4 View TABLE 4 .

Head: Head capsule subquadrate, strongly constricted at level of occiput; anterior margin of frontoclypeus narrowly convex, extending well beyond level of adnasalia; scale-like sculpticels lacking over frontoclypeus, welldeveloped over parietale; adnasalia margined with elongate acute teeth (see Fig. 64 View FIGURE 64 ); HL = 0.61 mm; A/MP = 1.49; MP/LP = 2.06; MP2/MP1 = 1.60; GA/MP1 = 1.91; LP2/LP1 = 2.24; MNL/MNW = 3.11.

Thorax: L3 = 1.23 mm.

Abdomen: LAS = 0.45 mm; LAS subcylindrical, slightly constricted posteriorly at point of insertion of urogomphi. Urogomphus: U = 0.26 mm, composed of one urogomphomere; U/HW = 0.41; U/LAS = 0.58.

Chaetotaxy: Parietale with 8 temporal spines; position and number of secondary setae on legs are shown in Table 5 View TABLE 5 .

Description, instar III ( Figs 28–29 View FIGURES 28–29 , 64 View FIGURE 64 ). As second-instar larva except as follows:

Body: Measurements and ratios aimed to characterize body shape are shown in Table 6.

Head ( Figs 28 View FIGURES 28–29 , 64 View FIGURE 64 ): HL = 0.81–0.84 mm; A/MP = 1.42–1.46; MP/LP = 2.02–2.25; MP2/MP1 = 1.51–1.74; GA/MP1 = 1.75–1.99; LP2/LP1 = 1.55–1.78; MNL/MNW = 2.85–2.98.

Thorax: L3 = 1.66–1.72 mm.

Abdomen ( Fig 29 View FIGURES 28–29 ): LAS = 0.66–0.69 mm; Urogomphus, U = 0.31–0.33 mm, composed of one urogomphomere; U/HW = 0.35–0.38; U/LAS = 0.45–0.49.

Chaetotaxy: Parietale with 9–10 temporal spines; position and number of secondary setae on legs are shown in Table 7 View TABLE 7 .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Dytiscidae

Genus

Copelatus

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