Dendrelaphis Boulenger 1890
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2025
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| _version_ | 1866902084510547968 |
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| author | Kraus, Fred |
| author_facet | Kraus, Fred |
| contents | <p>Given that van Rooijen <i>et al.</i> (2015) recognized six <i>Dendrelaphis</i> species in Melanesia</p><p>and I recognize ten, it seems useful to provide an updated key to the species in that region. I exclude the two species (<i>D. keiensis</i>, <i>D. striolatus</i>) clearly extralimital to Melanesia, for which the key provided by van Rooijen <i>et al.</i> (2015) is sufficient. Van Rooijen <i>et al.</i> (2015) also considered <i>D. punctulatus</i> to be restricted to Australia and, hence, extralimital to Melanesia, and they placed all New Guinean snakes formerly assigned to <i>D. punctulatus</i> in <i>D. macrops</i>. However, snakes I have collected from eastern Papua New Guinea do not accord with <i>D. macrops</i> and presumably represent true <i>D. punctulatus</i>. This issue requires further investigation, but in the meantime I conservatively include <i>D. punctulatus</i> in the key below.</p><p>1 Adults black/dark gray above and below, chin and throat white, juveniles gray or brown............................. 2</p><p>- Adults other than black with white chin and throat........................................................... 4</p><p>2 Pale vertebral stripe present on anterior body......................................................... <i>D. roseni</i></p><p>- Pale vertebral stripe absent on anterior body................................................................ 3</p><p>3 Labials and chin matte white heavily stained or dusted with black, no sharp demarcation between color fields on supralabials; hemipenis without large spines basally, calyculate distally, with large transverse ridge that encircles entire organ..... <i>D. atra</i></p><p>- Labials and chin glossy white with few or no glossy black markings, black on dorsal portions of supralabials sharply demarcated from white on ventral portions; hemipenis with large spines basally and many small spines distally, transverse ridge limited to a semicircle on left of sulcus spermaticus........................................................ <i>D. anthracina</i></p><p>4 Head speckled with dark markings; EY much smaller than EN......................................... <i>D. lorentzii</i></p><p>- Head unspeckled with dark markings; EY subequal to or larger than EN.......................................... 5</p><p>5 Tail and top of head black; body paler with wide (ca. 1 scale width) and widely separated, oblique black bars... <i>D. lineolatus</i></p><p>- Tail and top of head same color as body; no wide, oblique black bars on body..................................... 6</p><p>6 Black postocular stripe absent........................................................................... 7</p><p>- Black postocular stripe present........................................................................... 8</p><p>7 EY> EN;> 140 subcaudals..................................................................... <i>D. macrops</i></p><p>- EY ≤ EN; <140 subcaudals.................................................................. <i>D. punctulatus</i></p><p>8 Venter with large black spots interspersed amongst small dark speckles................................ <i>D. gastrostictus</i></p><p>- Venter uniform or with few dark markings but no larger black spots or dense speckling.............................. 9</p><p>9 Dorsum with pale vertebral stripe anteriorly....................................................... <i>D. papuensis</i></p><p>- Vertebral scales same color as surrounding scales........................................................... 10</p><p>10 Each dorsal scale margined with black, forming narrow oblique lines along each scale row; hemipenis with large spines basally, many small spines distally................................................................... <i>D. melanarkys</i></p><p>- Dorsal scales not margined with black to form narrow oblique lines along each scale row; hemipenis without large spines basally, calyculate distally.................................................................... <i>D. calligastra</i></p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15296164 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Dendrelaphis Boulenger 1890 Kraus, Fred Biodiversity Taxonomy Animalia Chordata Squamata Colubridae Dendrelaphis <p>Given that van Rooijen <i>et al.</i> (2015) recognized six <i>Dendrelaphis</i> species in Melanesia</p><p>and I recognize ten, it seems useful to provide an updated key to the species in that region. I exclude the two species (<i>D. keiensis</i>, <i>D. striolatus</i>) clearly extralimital to Melanesia, for which the key provided by van Rooijen <i>et al.</i> (2015) is sufficient. Van Rooijen <i>et al.</i> (2015) also considered <i>D. punctulatus</i> to be restricted to Australia and, hence, extralimital to Melanesia, and they placed all New Guinean snakes formerly assigned to <i>D. punctulatus</i> in <i>D. macrops</i>. However, snakes I have collected from eastern Papua New Guinea do not accord with <i>D. macrops</i> and presumably represent true <i>D. punctulatus</i>. This issue requires further investigation, but in the meantime I conservatively include <i>D. punctulatus</i> in the key below.</p><p>1 Adults black/dark gray above and below, chin and throat white, juveniles gray or brown............................. 2</p><p>- Adults other than black with white chin and throat........................................................... 4</p><p>2 Pale vertebral stripe present on anterior body......................................................... <i>D. roseni</i></p><p>- Pale vertebral stripe absent on anterior body................................................................ 3</p><p>3 Labials and chin matte white heavily stained or dusted with black, no sharp demarcation between color fields on supralabials; hemipenis without large spines basally, calyculate distally, with large transverse ridge that encircles entire organ..... <i>D. atra</i></p><p>- Labials and chin glossy white with few or no glossy black markings, black on dorsal portions of supralabials sharply demarcated from white on ventral portions; hemipenis with large spines basally and many small spines distally, transverse ridge limited to a semicircle on left of sulcus spermaticus........................................................ <i>D. anthracina</i></p><p>4 Head speckled with dark markings; EY much smaller than EN......................................... <i>D. lorentzii</i></p><p>- Head unspeckled with dark markings; EY subequal to or larger than EN.......................................... 5</p><p>5 Tail and top of head black; body paler with wide (ca. 1 scale width) and widely separated, oblique black bars... <i>D. lineolatus</i></p><p>- Tail and top of head same color as body; no wide, oblique black bars on body..................................... 6</p><p>6 Black postocular stripe absent........................................................................... 7</p><p>- Black postocular stripe present........................................................................... 8</p><p>7 EY> EN;> 140 subcaudals..................................................................... <i>D. macrops</i></p><p>- EY ≤ EN; <140 subcaudals.................................................................. <i>D. punctulatus</i></p><p>8 Venter with large black spots interspersed amongst small dark speckles................................ <i>D. gastrostictus</i></p><p>- Venter uniform or with few dark markings but no larger black spots or dense speckling.............................. 9</p><p>9 Dorsum with pale vertebral stripe anteriorly....................................................... <i>D. papuensis</i></p><p>- Vertebral scales same color as surrounding scales........................................................... 10</p><p>10 Each dorsal scale margined with black, forming narrow oblique lines along each scale row; hemipenis with large spines basally, many small spines distally................................................................... <i>D. melanarkys</i></p><p>- Dorsal scales not margined with black to form narrow oblique lines along each scale row; hemipenis without large spines basally, calyculate distally.................................................................... <i>D. calligastra</i></p> |
| title | Dendrelaphis Boulenger 1890 |
| topic | Biodiversity Taxonomy Animalia Chordata Squamata Colubridae Dendrelaphis |
| url | https://doi.org/10.5281/zenodo.15296164 |