Published November 26, 2024
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TABLE 2 in Morphology of the egg-case and larva of Paracymus aeneus (Germar) (Coleoptera: Hydrophilidae)
Authors/Creators
- 1. Natural History Division, Kitakyushu Museum of Natural History and Human History, 2 - 4 - 1 Higashida, Yahatahigashi-ku, Kitakyushushi, Fukuoka-ken, 805 - 0071 Japan.
- 2. Ishikawa Insect Museum, Inu- 3, Yawata-machi, Hakusan-shi, Ishikawa-ken, 920 - 2113 Japan.
Description
TABLE 2. Comparison of morphological characters of immature stages of Paracymus. For references, see Table 1.
| Character | P. aeneus | P. pygmaeus | P. subcupreus | P. rufocinctus |
|---|---|---|---|---|
| Egg-case | ||||
| Mast of egg-case | Long, slender | ? | Short, stout | Long, slender |
| Larva | ||||
| Number of nasale teeth | 3 | 4 | 4 | 3 and small ventral irregular teeth |
| Epistomal lobe | Projecting as far as nasale | Not projecting further than nasale | Projecting as far as nasale | Distinctly projecting further than nasale |
| Shape of epistomal lobe | Rounded | Rounded, slightly angulate | Rounded | Angulate |
| Number of setae on gFR2 | 2 | 2 | 2 | 3 (two on apex, one lateral) |
| FR2 | Present, pore-like | ? | Absent | ? |
| Position of PA7 | Midlength of head capsule | ? | Posterior third of head capsule | ? |
| Number of inner teeth on mandible | 3 | 3 | 3 | 2 |
| Antennal segment 2 | Without cuticular spines | ? | Without cuticular spines | With cuticular spines |
| Dorsal surface of stipes | Largely membranous | Sclerotized? | Sclerotized | Sclerotized |
| Maxillary palpomere 1 | Incompletely cylindrically sclerotized | ? | Incompletely cylindrically sclerotized | Cylindrically sclerotized |
| Cuticular spines on maxillary palpomere 1 | Absent | Present | Present | Absent |
| Dorsal teeth on mentum | A few teeth | ? | Many teeth (L1), a few teeth (L3) | Many teeth |
| Secondary setae on distal margin of mentum | 2–4 pairs | ? | 6 or 7 pairs | 3 pairs |
| Cuticular spines on anterior corner of mentum | Present (indistinct or absent in L3) | ? | Absent? | Absent? |
| Cuticular spines of prementum | Present | ? | Present | Absent |
| Ligula | Short | Long, as long as palpus | Long, slightly shorter than or as long as palpus | Very long, more than twice as long as palpus |
| Ligula | Partly sclerotized | ? | Sclerotized | Membranous |
| Position of LA12 on ligula | Apical area | ? | Apical area | Subapical area |
| Thorax and abdomen | Weakly lobed | Lobed | Weakly lobed | Strongly lobed |
| Dorsal sclerites of abdominal segments 2–6 | One pair of small, oval sclerites | Single sclerite, transverse | Single sclerite, transverse | One pair of sclerites and two transverse sclerites |
| Abdominal lobes | Membranous | ? | Membranous | Sclerotized |
......continued on the next page
Notes
Published as part of Minoshima, Yûsuke N. & Watanabe, Kohei, 2024, Morphology of the egg-case and larva of Paracymus aeneus (Germar) (Coleoptera: Hydrophilidae), pp. 211-212 in Zootaxa 5541 (2) on page 211, DOI: 10.11646/zootaxa.5541.2.5, http://zenodo.org/record/14240956
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Related works
- Is part of
- Journal article: 10.11646/zootaxa.5541.2.5 (DOI)
- Journal article: urn:lsid:plazi.org:pub:FF8A7E070C091B0ABA77774D423CFFF7 (LSID)
- Journal article: http://publication.plazi.org/id/FF8A7E070C091B0ABA77774D423CFFF7 (URL)
- Journal article: http://zenodo.org/record/14240956 (URL)
- Journal article: http://zoobank.org/C0E15E91-BAAD-463D-8647-2E795BF7EC1E (URL)