CTENIPOCORINI, Sites, 2022

Sites, Robert W., 2022, Phylogeny and revised classification of the saucer bugs (Hemiptera: Nepomorpha: Naucoridae), Zoological Journal of the Linnean Society 195, pp. 1245-1286 : 1264-1265

TRIBE CTENIPOCORINI TRIB. NOV.

FIG. 4A

Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: 12EF5622-B1D8-465E-8393-3311969AB761

Diagnosis: Males and females both have twosegmented fore tarsi with paired, movable pretarsal claws ( Fig. 4a ), which is the plesiomorphic condition. The nymphs have two meso- and metatarsal segments, another plesiomorphic condition, which distinguishes this tribe from the other tribes in Laccocorinae , which each have only a single segment. Adults have stout spines on the meso- and metatibiae. The aedeagus and parameres are symmetrical, which along with the

PHYLOGENY OF NAUCORIDAE ( HEMIPTERA ) 1265

pygophores, are dramatically different between species from the Old and New Worlds, and possibly also within each hemisphere. The body shape tends to be slightly wider at the middle and the fore femora less robust than in most other saucer bugs.

Comments: The two analyses yielded different topologies in the relationship of Ctenipocoris with the remainder of the subfamily. The BI analysis recovered Ctenipocoris as sister to the remainder of Laccocorinae and is here recognized also as the new tribe Ctenipocorini . The hypothesis in ML is less likely from the standpoint of character evolution, because the alternative character state of a suite of characters descriptive of Laccocorinae would have to have convergently evolved multiple times in other clades to support this topology.

Although Ctenipocoris is essentially circumtropical in lentic habitats, it is uncommonly collected. This widespread, disjunct distribution with few species and uncommon occurrence suggests that Ctenipocoris might have previously been more diverse and was outcompeted by other taxa, such as Pelocoris in the New World and species of Naucorinae in the Old World. In a treatment of Telmatotrephes Stål, 1854 (Nepidae) , which similarly is distributed in both hemispheres and represented by relatively few species, Lansbury (1972) also considered the discontinuous distribution to be evidence of a relict group in decline. A key to identify the Neotropical species of Ctenipocoris was presented by Herrera (2013).

Included taxa: This tribe is represented by only the genus Ctenipocoris and eight described species. A few additional undescribed species are represented in the Enns Entomology Museum, University of Missouri, and other museum collections.

Figures

Figure 4. Foretibiae and foretarsi of Laccocorinae: Ctenipocoris asiaticus (a), Heleolaccocoris ovatus (b), Namtokocoris dalanta (c).